AQUA CHEM INC
S-4/A, 1999-01-05
FABRICATED PLATE WORK (BOILER SHOPS)
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<PAGE>   1
 
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 5, 1999
    
                                                      REGISTRATION NO. 333-60759
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
   
                                AMENDMENT NO. 6
    
                                       TO
                                    FORM S-4
                          REGISTRATION STATEMENT UNDER
                           THE SECURITIES ACT OF 1933
 
                                AQUA-CHEM, INC.
             (Exact name of Registrant as specified in its charter)
 
<TABLE>
<S>                             <C>                             <C>
           DELAWARE                          3443                         39-1900496
(State or other jurisdiction of  (Primary Standard Industrial   (I.R.S. Employer Identification
incorporation or organization)          Classification                      Number)
                                         Code Number)
</TABLE>
 
                            7800 NORTH 113TH STREET
                                  P.O. BOX 421
                          MILWAUKEE, WISCONSIN, 53201
                                 (414) 359-0600
  (Address, including zip code, and telephone number, including area code, of
                   Registrants' principal executive offices)
 
                               JEFFREY A. MILLER
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                AQUA-CHEM, INC.
                            7800 NORTH 113TH STREET
                                  P.O. BOX 421
                          MILWAUKEE, WISCONSIN, 53201
                                 (414) 359-0600
  (Address, including zip code, and telephone number, including area code, of
                         agent for service of process)
 
                Please address a copy of all communications to:
 
                           ANDREW J. GUZIKOWSKI, ESQ.
                          WHYTE HIRSCHBOECK DUDEK S.C.
                           111 EAST WISCONSIN AVENUE
                                   SUITE 2100
                           MILWAUKEE, WISCONSIN 53202
                                 (414) 273-2100
 
APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this Registration Statement.
 
If the securities being registered on this Form are being offered in connection
with the formation of a holding company and there is compliance with General
Instruction G, check the following box. [ ]
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<PAGE>   2
 
                                   PROSPECTUS
 
[AQUA-CHEM LOGO]
                                AQUA-CHEM, INC.
 
  OFFER TO EXCHANGE 11 1/4% SENIOR SUBORDINATED NOTES DUE 2008 FOR ANY AND ALL
EXISTING NOTES (AS DEFINED) AS DESCRIBED HEREIN. WITHDRAWAL RIGHTS WITH RESPECT
 TO THE EXCHANGE OFFER (AS DEFINED) ARE EXPECTED TO EXPIRE AT THE EXPIRATION OF
                              THE EXCHANGE OFFER.
THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON FEBRUARY 5,
                             1999, UNLESS EXTENDED.
 
     Aqua-Chem, Inc., a Delaware corporation (the "Company"), hereby offers (the
"Exchange Offer"), upon the terms and subject to the conditions set forth in
this prospectus (the "Prospectus") and the accompanying letter of transmittal
(the "Letter of Transmittal"), to exchange up to $125,000,000 aggregate
principal amount of its 11 1/4% Senior Subordinated Notes Due 2008 (the
"Exchange Notes"), which have been registered under the Securities Act of 1933,
as amended (the "Securities Act"), pursuant to a Registration Statement (as
defined) of which this Prospectus is a part, for a like principal amount of its
outstanding 11 1/4% Senior Subordinated Notes Due 2008 (the "Existing Notes"
and, together with the Exchange Notes, the "Notes"). The Existing Notes were
originally issued in a transaction that was exempt from registration under the
Securities Act (the "Private Offering") and since such issuance have been resold
to (i) qualified institutional buyers ("QIBs") in reliance on, and subject to
the restrictions imposed pursuant to, Rule 144A under the Securities Act ("Rule
144A") and (ii) non-U.S. persons outside the United States of America in
accordance with Regulation S under the Securities Act ("Regulation S"). The
terms of the Exchange Notes are identical in all material respects to the terms
of the Existing Notes that are to be exchanged therefor, except that the
Exchange Notes have been registered under the Securities Act and will not bear
legends restricting the transferability thereof, certain registration rights
relating to the Existing Notes will terminate upon completion of the Exchange
Offer, and, if the Exchange Offer is not consummated by December 21, 1998,
additional interest will accrue at the rate of 0.50% per annum until but not
including the date the Exchange Offer is consummated. See "Description of the
Notes" and "The Exchange Offer." For federal income tax purposes, an exchange
made pursuant to the Exchange Offer should not constitute a taxable exchange.
See "The Exchange Offer -- Certain Effects of the Exchange Offer."
 
     Based on interpretations by the staff of the Securities and Exchange
Commission (the "Commission" or "SEC"), as set forth in no-action letters issued
to third parties, the Company believes the Exchange Notes issued pursuant to the
Exchange Offer may be offered for resale, resold and otherwise transferred by
holders thereof (other than any such holder that is an "affiliate" of the
Company within the meaning of Rule 405 under the Securities Act) without
compliance with the registration and prospectus delivery provisions of the
Securities Act, provided that such Exchange Notes are acquired in the ordinary
course of such holders' business, such holders are not engaged in and do not
intend to engage in, a distribution of such Exchange Notes and such holders have
no arrangement or understanding with any person to participate in the
distribution of such Exchange Notes. However, the Commission has not considered
the Exchange Offer in the context of a no-action letter and therefore there can
be no assurance that the staff of the Commission would make a similar
determination with respect to the Exchange Offer as in such other circumstances.
 
     The Existing Notes are, and the Exchange Notes will be, general unsecured
senior subordinated obligations of the Company and subordinate in right of
payment to all existing and future Senior Indebtedness (as defined) of the
Company. The Existing Notes rank, and the Exchange Notes will rank, pari passu
in right of payment to all existing and future Senior Subordinated Indebtedness
(as defined) of the Company and senior to any future subordinated indebtedness
of the Company. As of September 30, 1998, the Company (i) had no outstanding
Senior Subordinated Indebtedness, (ii) had no outstanding Senior Indebtedness,
and (iii) could have incurred up to $77.3 million of Senior Indebtedness,
including $45.0 million of borrowing availability under the Company's credit
facility entered into with Comerica Bank as of June 23, 1998 (the "New Credit
Facility"). Borrowing under the New Credit Facility, when borrowed, will be
Senior Indebtedness, and will be secured by substantially all of the assets of
the Company. See "Summary -- Summary of Terms of the Exchange Notes -- Certain
Covenants."
 
     SEE "RISK FACTORS" ON PAGE 16 FOR A DESCRIPTION OF CERTAIN FACTORS THAT
SHOULD BE CONSIDERED IN CONNECTION WITH THE EXCHANGE OFFER AND AN INVESTMENT IN
THE EXCHANGE NOTES OFFERED HEREBY.
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR BY ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION
OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
     PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
   
                The date of this Prospectus is January 5, 1999.
    
<PAGE>   3
 
     Each holder of Existing Notes that desires to participate in the Exchange
Offer, other than a broker-dealer, must acknowledge that it is not engaged in,
and does not intend to engage in, a distribution of Exchange Notes and has no
arrangement or understanding to participate in a distribution of Exchange Notes.
Each broker-dealer that receives Exchange Notes for its own account pursuant to
the Exchange Offer must acknowledge that it will deliver a prospectus in
connection with any resale of such Exchange Notes. The Letter of Transmittal
states that by so acknowledging and by delivering a prospectus, a broker-dealer
will not be deemed to admit that it is an "underwriter" within the meaning of
the Securities Act. This Prospectus, as it may be amended or supplemented from
time to time, may be used by a broker-dealer in connection with resales of
Exchange Notes received in exchange for Existing Notes where such Existing Notes
were acquired by such broker-dealer as a result of market-making activities or
other trading activities. The Company has agreed that, for a period of 180 days
after the Expiration Date (as defined herein), it will make this Prospectus
available to any broker-dealer for use in connection with any such resale. See
"The Exchange Offer" and "Plan of Distribution."
 
     EXCEPT AS DESCRIBED IN THE PRECEDING PARAGRAPH, THIS PROSPECTUS MAY NOT BE
USED FOR AN OFFER TO RESELL, A RESALE OR ANY OTHER RETRANSFER OF EXCHANGE NOTES.
 
     The Exchange Offer is not conditioned upon any minimum number of Existing
Notes being tendered. The Exchange Offer will expire at 5:00 p.m., New York City
time, on February 5, 1999, unless extended (the "Expiration Date"). Subject to
the terms and conditions of the Exchange Offer, including the reservation of
certain rights by the Company and the right of holders of Existing Notes to
withdraw tenders prior to the acceptance thereof, Existing Notes validly
tendered prior to the Expiration Date will be accepted on or promptly after the
Expiration Date. Exchange Notes to be issued in exchange for properly tendered
Existing Notes will be mailed by the Exchange Agent (as defined) promptly after
the acceptance thereof. In the event the Company terminates the Exchange Offer
and does not accept for exchange any Existing Notes, the Company will promptly
return the Existing Notes to the holders thereof. See "The Exchange Offer."
 
     The Notes will mature on July 1, 2008. Interest on the Notes will be
payable semiannually on January 1 and July 1 of each year, commencing January 1,
1999. The Existing Notes are not, and the Exchange Notes will not be, redeemable
at the option of the Company, prior to July 1, 2003, except that, until July 1,
2001, the Company may redeem, at its option, up to an aggregate of 20% of the
original principal amount of the Notes with the net cash proceeds of one or more
Public Equity Offerings (as defined) at a redemption price equal to 111.25% of
the principal amount thereof, plus accrued and unpaid interest, if any, to the
date of redemption; provided, however, that at least $100.0 million principal
amount of the Notes originally issued remains outstanding immediately after any
such redemption. On or after July 1, 2003, the Notes may be redeemed at the
option of the Company, in whole or in part, at the redemption prices set forth
herein, plus accrued and unpaid interest, if any, to the date of redemption.
Upon a Change of Control (as defined), each holder of Notes will have the right
to require the Company to purchase all or a portion of such holder's Notes at a
purchase price equal to 101% of the principal amount thereof, plus accrued and
unpaid interest, if any, to the date of purchase. See "Description of the
Notes -- Optional Redemption" and "-- Change of Control."
 
     There has not previously been any public market for the Existing Notes or
the Exchange Notes. The Company does not intend to list the Exchange Notes on
any securities exchange or to seek approval for quotation through any automated
quotation system. There can be no assurance that an active market for the
Exchange Notes will develop. See "Risk Factors -- Absence of a Public Market for
the Notes; Volatility; Restrictions on Resale." Moreover, to the extent that
Existing Notes are tendered and accepted in the Exchange Offer, the trading
market, if any, for untendered and tendered but unaccepted Existing Notes could
be adversely affected.
 
     The Company will not receive any proceeds from the Exchange Offer, but will
bear certain offering expenses pursuant to the Registration Rights Agreement,
dated June 18, 1998 (the "Registration Agreement"), among the Company and the
Initial Purchasers (as defined) of the Existing Notes. The Exchange Offer is
intended to satisfy certain of the Company' obligations under the Registration
Agreement, including the obligation to register the Existing Notes under the
Securities Act. See "The Exchange Offer -- Registration Agreement." Upon the
completion of the Exchange Offer, certain special rights under the Registration
Agreement will terminate with respect to Existing Notes, and holders of Exchange
Notes will not
 
                                       ii
<PAGE>   4
 
be entitled to such rights. See "The Exchange Offer -- Termination of Certain
Rights." No dealer manager is being utilized in connection with the Exchange
Offer.
                            ------------------------
 
                DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS
 
     This Prospectus includes "forward-looking statements. Forward-looking
statements include statements regarding the intent, belief of current
expectations of the Company, primarily with respect to the future operating
performance of the Company or related industry developments. When used in this
Prospectus, terms such as "anticipate," "believe," "estimate," "expect,"
"indicate," "may be," "objective," "plan," "predict," and "will be" are intended
to identify such statements. All statements other than statements of historical
facts included in this Prospectus, including, without limitation, such
statements under "Summary," "Management's Discussion and Analysis of Financial
Condition and Results of Operations of Aqua-Chem," "Business of the Company,"
"Management's Discussion and Analysis of Financial Condition and Results of
Operations of NDC," and located elsewhere herein, regarding the financial
position and capital expenditures of the Company are forward-looking statements.
Although the Company believes that the expectations reflected in such
forward-looking statements are reasonable, it can give no assurance that such
expectations will prove to have been correct. Important factors that could cause
actual results to differ materially from such expectations ("Cautionary
Statements") are disclosed in this Prospectus, including, without limitation, in
conjunction with the forward-looking statements included in this Prospectus
and/or under "Risk Factors." All subsequent written or oral forward-looking
statements attributable to the Company or persons acting on behalf of the
Company are expressly qualified in their entirety by the Cautionary Statements.
                            ------------------------
 
     The industry size and growth, market share and competitive position data
contained in this Prospectus are based on internal, industry and other sources
that are believed to be reliable. Such data are inherently imprecise, but the
Company believes that such data are generally indicative of industry size and
growth and the Company's relative market share and competitive position.
 
                                       iii
<PAGE>   5
 
                                    SUMMARY
 
     The following summary is qualified in its entirety by, and should be read
in conjunction with, the more detailed information and the historical and pro
forma financial statements contained elsewhere in this Prospectus. Unless the
context requires otherwise, as used in this Prospectus: (i) "Aqua-Chem" refers
to Aqua-Chem, Inc., a Delaware corporation, and its predecessors and
subsidiaries on a historical basis prior to the Acquisition; (ii) "NDC" refers
to National Dynamics Corporation, a Nebraska corporation, and its predecessors
on a historical basis prior to the Acquisition; (iii) "Acquisition" refers to
the acquisition of substantially all of the assets of NDC by Aqua-Chem which was
consummated on June 23, 1998; (iv) "Company" refers to the combined businesses
of Aqua-Chem and NDC following the Acquisition; (v) "Management Buy-Out" refers
to the July 31, 1997 acquisition of Aqua-Chem by certain members of its
management and Whitney Equity Partners, L.P.; and (vi) "twelve months ended
December 31, 1997" refers to Aqua-Chem's seven-month period ended July 31, 1997
and its five-month period ended December 31, 1997 on a combined basis (see
"Management's Discussion and Analysis of Financial Condition and Results of
Operations of Aqua-Chem").
 
                                  THE COMPANY
 
     The Company is the world's leading manufacturer of commercial and
industrial boilers, burners, related equipment and aftermarket parts. The
Company believes that in the U.S. market for each of its three principal boiler
product lines it enjoys the #1 or #2 market position. In addition, management
believes that the Company has the largest installed base of boilers in the world
(estimated at over 80,000 boilers), which facilitates the Company's sale of
higher margin aftermarket parts. Management attributes the Company's leading
market positions to its extensive global distribution network, well-recognized
Cleaver-Brooks and Nebraska Boiler brand names, and its reputation for providing
high-quality, energy-efficient, low-emission boilers with a demonstrated record
of safety and durability.
 
     The Company is also a world leader in the design and production of water
purification and treatment products and systems sold under the Aqua-Chem brand
name for selected commercial, government, military, and industrial applications.
On a pro forma basis for the twelve months ended December 31, 1997, the Company
generated net sales and Adjusted EBITDA (as defined) of $249.3 million and $23.7
million, respectively, of which approximately 82% and 89%, respectively, were
attributable to the Company's boiler business and related product lines. For the
same period pro forma net income from continuing operations was $1.8 million.
 
                             COMPETITIVE STRENGTHS
 
     The Company believes it has a strong competitive position attributable to a
number of factors, including the following:
 
     Leading Market Positions and Recognized Brands. The Company believes it has
the #1 or #2 market position in North America in each of its three principal
boiler product lines and the largest installed base of commercial and industrial
boilers in the industry. The Company believes that its Cleaver-Brooks and
Nebraska Boiler products (manufactured by the Company's Cleaver-Brooks Division
("Cleaver-Brooks") and National Dynamics Division ("National Dynamics"),
respectively) enjoy industry-leading brand recognition, as well as estimated
combined market shares of approximately 25% to 70%.
 
     Extensive Global Boiler Distribution Network. Management believes that the
Company has the most extensive global distribution network for commercial and
industrial boilers, with 50 sales representatives in North America and 43
independent international sales representatives representing Cleaver-Brooks
product lines, and an additional 46 independent sales representatives in North
America who represent Nebraska Boiler product lines. The Company enjoys
longstanding relationships with its sales representatives, many of whom have
sold the Company's products for more than 25 years, and the majority of whom do
not sell competing products. The Company has agreements with its Cleaver-Brooks
sales representatives to sell Cleaver-Brooks products to the exclusion of
competitive products.
 
     Large Installed Product Base. The Company has an installed base estimated
at over 80,000 boilers. The Company believes that this large installed product
base provides a significant competitive advantage in obtaining orders to
refurbish, repair or replace boilers, principally because customers tend to
purchase equipment and parts from the original supplier. The installed product
base also provides the Company with a recurring source of demand for aftermarket
boiler parts, which generally carry higher margins than new boilers. Aftermarket
parts accounted for approximately 20% of Cleaver-Brooks' net sales for the
twelve
 
                                        1
<PAGE>   6
 
months ended December 31, 1997, as compared with approximately 3% of NDC's net
sales for fiscal 1997. Management intends to implement initiatives to increase
the sale of aftermarket parts to existing Nebraska Boiler customers.
 
     Diverse Customer Base. The Company sells its products to over 2,000
customers annually in a wide variety of industries with no significant customer
concentration. The Company believes that its broad, diverse customer base
mitigates its exposure to economic dislocations in any particular industry or
geographic region.
 
     Commitment to Quality and Service. The Company believes that its strong
customer relationships result from its demonstrated commitment to provide
high-quality, energy-efficient, low-emission products with a demonstrated record
of safety and durability. The Company employs a staff of highly-trained
engineers and constantly strives to improve product quality. Although its
customers vary from year to year, the Company believes that a substantial
portion of annual net sales are generally to repeat customers, such as Ford,
Cargill, Coca-Cola, Weyerhaeuser, Anheuser-Busch, Baxter Healthcare,
Ralston-Purina, Hewlett-Packard, Georgia Pacific, Chrysler-Jeep, Wrigley,
Sheraton, IBM, and NASA.
 
     Experienced Management Team with Significant Equity Ownership. Led by
Chairman and CEO Jeffrey A. Miller, the Company has an experienced senior
management team with strong manufacturing, marketing, and general management
skills and significant equity ownership. A group consisting primarily of senior
management collectively owns 49% of the common equity of the Company, including
34% owned by Mr. Miller.
 
                               BUSINESS STRATEGY
 
     The Company intends to enhance its leading market positions and to increase
net sales and profitability by pursuing the following business strategies:
 
     Achieve Integration of NDC. Management is focused on achieving the
successful integration of NDC and believes that there are numerous opportunities
to achieve annual cost savings and synergies totaling over $3.1 million as a
result of the combination of Aqua-Chem and NDC. See "-- Acquisition Rationale"
and "Unaudited Pro Forma Financial Data."
 
     Leverage Leading Market Positions. Management believes it can grow its core
boiler business by capitalizing on the Company's leading market positions to
increase net sales and profitability by, among other things: (i) leveraging its
extensive global distribution network, brand recognition, and longstanding
customer relationships to sell new and enhanced products through established
channels; and (ii) taking increased advantage of its large installed base of
equipment to generate incremental sales of replacement products and higher
margin aftermarket parts.
 
     Continue to Improve Manufacturing Efficiency. Senior management is
instilling a culture of continuous improvement intended to make the Company a
world-class manufacturer. Due in part to the implementation of a variety of
modern manufacturing practices, Aqua-Chem improved its gross profit margin from
approximately 19% for fiscal 1995 to approximately 27% for the twelve months
ended December 31, 1997. These new manufacturing practices, which have been
implemented at certain of the Company's manufacturing facilities, have improved
throughput, reduced production cycle times and inventory levels, and improved
the Company's ability to respond to customer needs. Management believes that it
can further improve manufacturing efficiency and reduce production costs by
continuing to implement these processes on a Company-wide basis.
 
     Enhance and Extend Product Lines. Historically, Aqua-Chem has established
its leading market positions by enhancing its principal products and by
designing and developing new and complementary products. Management believes
that pursuing this strategy will generate continued growth within its core
product lines. The Acquisition also expands Aqua-Chem's product offerings and
improves its overall market position. The Company will continue to evaluate
opportunities to expand product lines, increase market shares, and develop
complementary products internally and through selective strategic acquisitions.
 
     Increase International Penetration. Overseas markets are generally expected
to experience greater long-term growth than the U.S. market, and the Company
intends to leverage its strong global distribution network and focus on further
penetrating international markets, including Central and South America, Europe,
the Middle East, Russia, China and other Asian markets. In addition to directly
marketing its products to international customers, the Company will market its
products to domestic customers that are developing foreign production
facilities.
 
                                        2
<PAGE>   7
 
                                THE ACQUISITION
 
     On June 23, 1998, Aqua-Chem completed the acquisition of substantially all
of the assets of National Dynamics Corporation ("NDC") for a purchase price of
$47.0 million plus the assumption of certain liabilities and subject to certain
post-closing adjustments. The Company used a portion of the proceeds of the
Private Offering to finance the Acquisition. See "The Exchange Offer -- Use of
Proceeds" and "The Acquisition." Since the consummation of the Acquisition, the
former business of NDC has been operated as the Company's National Dynamics
Division. There can be no assurance that the expected benefits of the
Acquisition will be realized. See "Risk Factors -- Realization of the Benefits
of the Acquisition."
 
                             ACQUISITION RATIONALE
 
     Cleaver-Brooks sells firetube boilers, commercial and industrial watertube
boilers, and related boiler room accessories and aftermarket parts. National
Dynamics' principal product line is industrial watertube boilers with larger
capacities than those manufactured by Cleaver-Brooks. The Acquisition creates
the largest global manufacturer of industrial watertube boilers and will provide
the Company with (i) a broader, more diverse product portfolio and an enhanced
market position; (ii) significant cost savings and operating efficiencies; (iii)
increased aftermarket parts sales opportunities; and (iv) the ability to
leverage its extensive sales and distribution channels.
 
     Enhanced Product Portfolio and Market Position. With the Acquisition, the
Company has become the #1 global producer of industrial watertube boilers, with
the broadest product line available in the market. In addition to producing
boilers with higher capacities than Cleaver-Brooks boilers, National Dynamics
manufactures boilers that incorporate certain design features not available from
Cleaver-Brooks. For example, National Dynamics offers an "O" design boiler,
which is used primarily in the rental boiler industry, a customer base
Cleaver-Brooks does not currently focus on.
 
     Cost Savings and Operating Efficiencies. Management believes that the
Company can achieve annual cost savings of more than $3.1 million by (i) closing
a redundant manufacturing facility; (ii) rationalizing duplicative corporate,
general and administrative functions; (iii) in-sourcing certain components
currently procured from third parties that either Cleaver-Brooks or National
Dynamics already produces; and (iv) realizing additional advantages resulting
from increased scale (e.g., enhanced purchasing power). See "-- Summary
Unaudited Pro Forma Financial Data" and "Unaudited Pro Forma Financial Data."
 
     Penetration of Aftermarket Parts Market. In recent years aftermarket boiler
parts and accessories have accounted for approximately 20% of Cleaver-Brooks'
net sales as compared to approximately 3% of NDC's net sales. Aqua-Chem
attributes its relative success in selling aftermarket parts to management's
focus on this higher margin business and its policy of requiring sales
representatives to stock and sell Cleaver-Brooks brand parts. By extending these
practices to National Dynamics' business, management expects to increase the
Company's penetration of aftermarket parts sales among the installed base of
Nebraska Boiler customers.
 
     Sales and Distribution Leverage. Cleaver-Brooks has the most extensive
global distribution network in the boiler industry, with international sales
accounting for approximately 23% of its total net sales for the twelve months
ended December 31, 1997. Although NDC had an effective domestic distribution
system, international sales only accounted for approximately 12% of NDC's total
fiscal 1997 net sales due, in part, to its lack of an effective international
distribution system. Management intends to sell Nebraska Boiler products through
Cleaver-Brooks' established international distribution network to increase the
Company's overseas sales.
 
                                 RECENT HISTORY
 
     The 1994 and 1996 Restructurings. Prior to recruiting Jeffrey A. Miller as
Chief Executive Officer in July 1996, Aqua-Chem had undertaken two separate
restructurings. In December 1994, Aqua-Chem announced a plan (the "1994
Restructuring") to consolidate its boiler manufacturing operations. Aqua-Chem
closed its high-cost facility in Lebanon, Pennsylvania in the first half of 1995
and consolidated its large firetube boiler production in its Thomasville,
Georgia plant and its smaller firetube boiler production in its Stratford,
Ontario facility. Manufacturing costs were initially higher than anticipated as
these facilities absorbed the increased production and due to additional
training costs for new employees required to handle the increase in volume;
however, in 1996 Aqua-Chem began to resolve these issues, and manufacturing
efficiency improved accordingly. In November 1995, Aqua-Chem hired Mr. Miller's
predecessor, who initiated a second restructuring program in 1996 (the "1996
Restructuring") that was designed to dramatically reduce Aqua-
 
                                        3
<PAGE>   8
 
Chem's cost structure. The 1996 Restructuring consisted principally of
across-the-board reductions in salaried personnel and other selling, general and
administrative expenses.
 
     Recruitment of Jeffrey A. Miller as CEO. The 1996 Restructuring achieved a
reduction of selling, general and administrative expenses; however, Aqua-Chem's
board of directors determined that its business was being adversely affected
and, consequently, the board recruited Mr. Miller as Chief Executive Officer in
July 1996. Mr. Miller has over 20 years of experience in a broad range of
positions managing manufacturing companies, including 19 years in numerous
managerial and executive positions with The General Electric Company. Eschewing
short-term approaches to increasing profits, Mr. Miller began implementing a
long-term strategy designed to improve competitiveness, productivity and
quality, increase manufacturing efficiency, and leverage Aqua-Chem's market
positions. Mr. Miller has recruited certain new senior managers and introduced
more focused and innovative management, manufacturing and purchasing practices.
 
     The 1998 Restructuring. The Company has determined that it will close its
Greenville, Mississippi manufacturing facility and relocate the manufacturing
operations currently located there to other Company facilities, including the
Lincoln, Nebraska facility acquired from NDC as part of the Acquisition (the
"1998 Restructuring"). In conjunction with this closure, the Company has
recorded $4.7 million of restructuring charges to operating income during the
second quarter of 1998. A portion of the anticipated $3.1 million of annual cost
savings discussed under "-- Acquisition Rationale -- Cost Savings and Operating
Efficiencies" are attributable to the 1998 Restructuring. The Company has
reached an agreement with the union representing production workers at the
Greenville facility with respect to the closure of that facility and severance
and other benefits payable to union workers displaced as a result. The Company
is currently in the planning stages of transferring production to other
facilities. This process is expected to be completed within approximately one
year, at which time the Greenville plant will be closed.
 
                               COMPANY OWNERSHIP
 
     On July 31, 1997, Aqua-Chem management, led by Chairman and CEO Jeffrey A.
Miller, and Whitney Equity Partners, L.P. (a fund managed by J. H. Whitney &
Co.) acquired Aqua-Chem (the "Management Buy-Out") from its former owners, a
French conglomerate that owned 80% of Aqua-Chem and a privately held company
that owned 20%. As of the date of this Prospectus, all of the common equity of
the Company is held by Rush Creek LLC ("Rush Creek"), a holding company whose
only asset is the capital stock of the Company. Through Rush Creek, Whitney
Equity Partners L.P. and Jeffrey A. Miller own approximately 51% and 40%,
respectively, of the common equity of the Company, with the remainder owned
primarily by certain other members of senior management. See "Capital Stock and
Principal Stockholders." J. H. Whitney & Co., founded by Jock Whitney in 1946,
is a private equity investment firm headquartered in Stamford, Connecticut.
Through Rush Creek, Whitney Equity Partners L.P. has the ability to control the
management and affairs of the Company by virtue of its ownership of a majority
of the Company's capital stock, its ability to designate two of the Company's
six directors and, in certain instances, a majority of the Company's directors.
See "Risk Factors -- Control by Principal Shareholder" and "Capital Stock and
Principal Stockholders -- Voting Agreement." In addition, an affiliate of
Whitney Equity Partners L.P. holds a warrant to acquire 15% of the Company's
Common Stock on a fully-diluted basis. See "Capital Stock and Principal
Stockholders -- Capital Structure" and "-- Principal Stockholders." The Company
is also obligated to pay annual fees to J.H. Whitney & Co., an affiliate of
Whitney Equity Partners L.P. See "Certain Relationships and Related Transactions
- -- Other."
 
                              RECENT DEVELOPMENTS
 
     Purchase Price Dispute. Pursuant to the Asset Purchase Agreement, NDC was
required to deliver to the Company by August 22, 1998 a closing date balance
sheet on which the post-closing purchase price adjustments were to be based. The
Asset Purchase Agreement provided that the closing date balance sheet would be
audited on behalf of the Company by Arthur Andersen LLP. As a result of such
audit, the Company disputed certain items and requested a purchase price
reduction of approximately $1.6 million. The disputed items include units on
which the manufacturing process was nearly complete, but which had not been
shipped to customers, as of June 23, 1998. The Company took the position, as
part of its request for a purchase price reduction, that these products were
improperly accounted for by NDC as completed sales as of that date, resulting in
an overstatement of NDC's net asset value on the closing date balance sheet of
approximately $1.4 million. The overstatement is equal to NDC's gross margin on
these products.
 
                                        4
<PAGE>   9
 
     The Company and the former owners of NDC (the "Sellers") entered into an
agreement on October 27, 1998 resolving the purchase price dispute by reducing
the purchase price by one-half of the amount claimed by the Company, or $0.8
million. As part of this settlement, it was agreed that the cost of all future
warranty work on, and the risk of uncollectibility of receivables arising from,
the units in dispute as of June 23, 1998 would be borne one-half by the Company
and one-half by the Sellers.
 
     The Company does not believe that its assumption of the additional warranty
responsibility and bad debt risk will have a material adverse effect on the
Company's financial position or results of operations.
 
     Change in Fiscal Year.  The Company currently operates on a December 31
fiscal year, although certain financial covenants under the New Credit Facility
are measured on a fiscal year ending March 31. In part to harmonize this
inconsistency, management has recommended and the Board of Directors has adopted
a change in the Company's fiscal year end to March 31, effective immediately.
 
     Current Results.  Although the Company's financial results for the current
quarter ending December 31, 1998 cannot be estimated with precision and actual
performance may be better or worse than expected, based upon the Company's
operations for the two months ended November 30, 1998 and for December, 1998 to
date, the Company anticipates that its results of operations for the quarter
ending December 31, 1998 will not compare favorably with its results of
operations for the quarter ended December 31, 1997. The Company expects that
combined net sales for the three months ending December 31, 1998 (including the
net sales of the National Dynamics division, which was acquired in June of 1998)
will be approximately 25% less than combined net sales of the Company and
National Dynamics for the same period in 1997. Although there can be no
assurance that sales will increase in future quarters, it should be noted that
the Company's order backlog at November 30, 1998 was $83.5 million, an increase
of $33.3 million (66%) over order backlog at November 30, 1997, of which $26.4
million was attributable to the National Dynamics division which the Company did
not own in 1997. The Company attributes the anticipated sales decline to an
across the board decrease in demand in the major markets the Company serves. As
a result, the Company may experience a net loss from operations for the quarter
ending December 31, 1998, and expects to record a net loss for the quarter of
approximately $2.5 million, although the net loss could be in excess of that
amount. Despite these anticipated losses, management believes that the Company
will continue to maintain a strong liquidity position.
 
     Management has responded to this situation by accelerating implementation
of a plan that has been under development to reduce expenses while maintaining
the Company's competitive position and core business strengths. The Company
expects to announce specific elements of this plan as they are implemented over
the next several weeks. Although the Company believes that the plan will be
successful in reducing expenses and returning the Company's earnings to
historical levels, there can be no assurance that this will be the case, nor
should this information be viewed as indicative of the Company's expectations as
to its financial performance for any periods after the current quarter. The
forward-looking statements contained in this and the preceding paragraph are
qualified as set forth under "Disclosure Regarding Forward-Looking Statements."
 
                                  RISK FACTORS
 
     The Company is subject to significant business, economic, and competitive
uncertainties that are beyond its control and may adversely affect the Company's
future operations, financial performance or ability to repay the Notes.
Generally, these risks involve both financial restrictions on the Company, such
as the Company's substantial leverage and restrictive debt covenants, and
business-related considerations, such as the cyclical and competitive nature of
the industry in which the Company competes, the prices of raw materials and
component parts for the Company's products, the Company's success at
implementing its business strategy and realizing the benefits of the
Acquisition, and the extent of litigation and government regulation to which the
Company may be subject. In addition, certain characteristics of the Notes may
result in risks to their holders, such as the subordinate ranking of the Notes,
the obligation of the Company to repurchase Notes upon a Change of Control, the
absence of a public market for the Notes, volatility of the Notes and
restrictions on resale of the Notes.
 
     Although these risks are generally applicable to the Existing Notes as well
as the Exchange Notes, holders of Existing Notes should consider carefully the
factors described in "Risk Factors," particularly the consequences of failure to
exchange their Existing Notes, and all other information set forth in this
Prospectus, before tendering their Existing Notes in the Exchange Offer.
 
                                        5
<PAGE>   10
 
                     SUMMARY OF TERMS OF THE EXCHANGE OFFER
 
Registration Agreement.....  The Existing Notes were sold by the Company on June
                             23, 1998 (the "Issue Date") to Credit Suisse First
                             Boston Corporation and Bear, Stearns & Co. Inc.
                             (the "Initial Purchasers"), which resold the
                             Existing Notes to certain QIBs in reliance on Rule
                             144A and to certain non-U.S. persons in accordance
                             with Regulation S. In connection therewith, the
                             Company executed and delivered, for the benefit of
                             the holders of the Existing Notes, the Registration
                             Agreement providing for, among other things, the
                             Exchange Offer. See "The Exchange
                             Offer -- Registration Agreement" and "Plan of
                             Distribution."
 
The Exchange Offer.........  The Company is offering to exchange up to
                             $125,000,000 aggregate principal amount of Exchange
                             Notes for a like principal amount of Existing
                             Notes. The Company will issue the Exchange Notes on
                             the earliest practicable date following the
                             Expiration Date.
 
                             Based on interpretations by the staff of the
                             Commission, as set forth in several no-action
                             letters issued to third parties, the Company
                             believes that the Exchange Notes issued pursuant to
                             the Exchange Offer in exchange for Existing Notes
                             may be offered for resale, resold and otherwise
                             transferred by any holder thereof (other than any
                             such holder that is an "affiliate" of the Company
                             within the meaning of Rule 405 under the Securities
                             Act) without compliance with the registration and
                             prospectus delivery provisions of the Securities
                             Act, provided that such Exchange Notes are acquired
                             in the ordinary course of such holder's business
                             and that such holder is not engaged in, and does
                             not intend to engage in, a distribution of such
                             Exchange Notes and has no arrangement or
                             understanding with any person to participate in the
                             distribution of such Exchange Notes. The
                             Commission, however, has not considered the
                             Exchange Offer in the context of a no-action letter
                             and there can be no assurance that the staff of the
                             Commission would make a similar determination with
                             respect to the Exchange Offer as in such other
                             circumstances.
 
                             Each broker-dealer that receives Exchange Notes for
                             its own account in exchange for Existing Notes
                             pursuant to the Exchange Offer must acknowledge
                             that such Existing Notes were acquired by such
                             broker-dealer as a result of market-making
                             activities or other trading activities and that it
                             will deliver a prospectus in connection with any
                             resale of such Exchange Notes. The Letter of
                             Transmittal states that by so acknowledging and by
                             delivering a prospectus, a broker-dealer will not
                             be deemed to admit that it is an "underwriter"
                             within the meaning of the Securities Act. This
                             Prospectus, as it may be amended or supplemented
                             from time to time, may be used by a broker-dealer
                             in connection with resales of Exchange Notes
                             received in exchange for Existing Notes where such
                             Existing Notes were acquired by such broker-dealer
                             as a result of market-making activities or other
                             trading activities. The Company has agreed that,
                             for a period of 180 days after the Expiration Date,
                             it will make this Prospectus available to any
                             broker-dealer (which may include the Initial
                             Purchasers) that elects to exchange Existing Notes,
                             acquired for its own account as a result of
                             market-making activities or other trading
                             activities, for Exchange Notes (collectively,
                             "Participating Broker-Dealers") for use in
                             connection with any such resale. See "Plan of
                             Distribution."
 
                                        6
<PAGE>   11
 
                             Each holder of Existing Notes that desires to
                             participate in the Exchange Offer, other than a
                             broker-dealer, must acknowledge that it is not
                             engaged in, and does not intend to engage in, a
                             distribution of Exchange Notes and has no
                             arrangement or understanding to participate in a
                             distribution of Exchange Notes. See "The Exchange
                             Offer" and "Plan of Distribution."
 
Expiration Date............  The Exchange Offer will expire at 5:00 p.m. New
                             York City time, on February 5, 1999, unless the
                             Exchange Offer is extended by the Company in its
                             sole discretion, in which case the term "Expiration
                             Date" means the latest date and time to which the
                             Exchange Offer is extended.
 
Accrued Interest on the
Exchange Notes and Existing
Notes......................  Holders of Existing Notes that are accepted for
                             exchange will not receive any accrued interest
                             thereon. However, each Exchange Note will bear
                             interest from the most recent date on which
                             interest has been paid on the corresponding
                             Existing Note, or, if no interest has been paid,
                             from June 23, 1998.
 
Conditions to the Exchange
Offer......................  The Exchange Offer is subject to certain customary
                             conditions, which may be waived by the Company. See
                             "The Exchange Offer -- Conditions." The Exchange
                             Offer is not conditioned upon any minimum aggregate
                             principal amount of Existing Notes being tendered
                             for exchange.
 
Withdrawal Rights..........  Subject to the conditions set forth herein, tenders
                             of Existing Notes may be withdrawn prior to 5:00
                             p.m., New York City time, on the Expiration Date.
                             See "The Exchange Offer -- Withdrawal Rights."
 
Acceptance of Existing
Notes
and Delivery of Exchange
Notes......................  Subject to the terms and conditions of the Exchange
                             Offer, including the reservation of rights by the
                             Company, the Company will accept for exchange any
                             and all Existing Notes that are properly tendered
                             in the Exchange Offer, and not withdrawn, prior to
                             5:00 p.m., New York City time, on the Expiration
                             Date. Subject to such terms and conditions, the
                             Exchange Notes issued pursuant to the Exchange
                             Offer will be delivered on the earliest practicable
                             date following the Expiration Date. Any Existing
                             Notes not accepted for exchange for any reason will
                             be returned without cost to the tendering holder
                             thereof promptly after the Expiration Date. See
                             "The Exchange Offer -- Acceptance of Tenders."
 
Certain Federal Income Tax
Consequences...............  For federal income tax purposes, the exchange of an
                             Existing Note for a Exchange Note should not
                             constitute a taxable exchange by its holder.
                             Accordingly, the holders should not recognize any
                             taxable gain or loss upon such exchange. See "The
                             Exchange Offer -- Certain Effects of the Exchange
                             Offer."
 
Untendered Existing
Notes......................  Holders of Existing Notes who do not tender their
                             Existing Notes in the Exchange Offer or whose
                             Existing Notes are not accepted for exchange will
                             continue to hold such Existing Notes and will be
                             entitled to all the rights and preferences and will
                             be subject to the limitations applicable thereto
                             under the Indenture (as defined), except for any
                             such rights, preferences or limitations which, by
                             their terms, terminate or cease to be
 
                                        7
<PAGE>   12
 
                             effective as a result of this Exchange Offer. All
                             untendered and tendered but unaccepted Existing
                             Notes will continue to be subject to certain
                             restrictions on transfer provided therein. See
                             "Risk Factors -- Consequences of Failure to
                             Exchange." To the extent that Existing Notes are
                             tendered and accepted in the Exchange Offer, the
                             trading market, if any, for untendered and tendered
                             but unaccepted Existing Notes could be adversely
                             affected. See "Risk Factors -- Absence of a Public
                             Market for the Notes; Volatility; Restrictions on
                             Resale" and "The Exchange Offer -- Certain Effects
                             of the Exchange Offer."
 
Broker-Dealers.............  Each broker-dealer that receives Exchange Notes for
                             its own account in exchange for Existing Notes,
                             where such Existing Notes were acquired by such
                             broker-dealer as a result of market-making
                             activities or other trading activities, must
                             acknowledge that it will deliver a prospectus in
                             connection with any resale of such Exchange Notes.
                             See "Plan of Distribution."
 
Exchange Agent/Trustee.....  United States Trust Company of New York is serving
                             as Exchange Agent (the "Exchange Agent") in
                             connection with the Exchange Offer and as Trustee
                             ("Trustee") under the Indenture (as defined).
 
                     SUMMARY OF TERMS OF THE EXCHANGE NOTES
 
     The terms of the Exchange Notes and the Existing Notes are identical in all
material respects, except for certain transfer restrictions and registration
rights relating to the Existing Notes and except that, if the Exchange Offer is
not consummated by December 21, 1998, additional interest will accrue at the
rate of 0.50% per annum until but not including the date the Exchange Offer is
consummated.
 
Indenture..................  The Existing Notes were, and the Exchange Notes
                             will be, issued pursuant to an indenture dated as
                             of June 23, 1998 between the Company and the
                             Trustee (the "Indenture").
 
Exchange Notes.............  $125,000,000 in aggregate principal amount of
                             11 1/4% Senior Subordinated Notes Due 2008 of
                             Aqua-Chem, Inc. which have been registered under
                             the Securities Act.
 
Maturity Date..............  July 1, 2008.
 
Interest Payment Dates.....  Each January 1 and July 1, commencing January 1,
                             1999.
 
Ranking; Guarantees........  The Existing Notes are, and the Exchange Notes will
                             be, general unsecured senior subordinated
                             obligations of the Company and subordinate in right
                             of payment to all existing and future Senior
                             Indebtedness (as defined) of the Company. The
                             Existing Notes rank, and the Exchange Notes will
                             rank, pari passu in right of payment to all
                             existing and future Senior Subordinated
                             Indebtedness (as defined) of the Company and senior
                             to any future subordinated indebtedness of the
                             Company.
 
Optional Redemption........  The Existing Notes are not, and the Exchange Notes
                             will not be, redeemable at the option of the
                             Company, prior to July 1, 2003, except that, until
                             July 1, 2001, the Company may redeem, at its
                             option, up to an aggregate of 20% of the original
                             principal amount of the Notes with the net cash
                             proceeds of one or more Public Equity Offerings (as
                             defined) at a redemption price equal to 111.25% of
                             the principal amount thereof, plus accrued and
                             unpaid interest, if any, to the date of redemption;
                             provided, however, that at least $100.0 million
                             principal amount of the Notes originally issued
                             remains outstanding immediately after any such
                             redemption. On or after July 1, 2003, the Notes may
                             be redeemed at the option of the Company, in whole
                             or in part, at the redemption prices set
 
                                        8
<PAGE>   13
 
                             forth herein, plus accrued and unpaid interest, if
                             any, to the date of redemption. See "Description of
                             the Notes -- Optional Redemption."
 
Change of Control..........  Upon a Change of Control (as defined), each holder
                             of Notes will have the right to require the Company
                             to purchase all or a portion of such holder's Notes
                             at a purchase price equal to 101% of the principal
                             amount thereof, plus accrued and unpaid interest,
                             if any, to the date of purchase. In the event of a
                             Change of Control, there can be no assurance that
                             the Company will have the financial resources or be
                             permitted under the terms of its other indebtedness
                             to purchase the Notes. See "Description of the
                             Notes -- Change of Control."
 
Certain Covenants..........  The Indenture contains certain covenants that,
                             among other things, limit (i) the incurrence of
                             additional Indebtedness (as defined) by the Company
                             and its Restricted Subsidiaries (as of September
                             30, 1998, the Company could have incurred
                             additional Indebtedness of approximately $77.3
                             million under this limitation; see "Risk
                             Factors -- Substantial Leverage; Ability to Service
                             the Notes"); (ii) the payment of dividends and
                             other restricted payments by the Company and its
                             Restricted Subsidiaries; (iii) the creation of
                             restrictions on distributions from Restricted
                             Subsidiaries, (iv) asset sales; (v) transactions
                             with affiliates; (vi) sales or issuances of
                             Restricted Subsidiary capital stock, and (vii)
                             mergers and consolidations; provided, however, that
                             all these limitations and prohibitions are subject
                             to a number of important qualifications and
                             exceptions. See "Risk Factors -- Restrictive Debt
                             Covenants" and "Description of the Notes -- Certain
                             Covenants."
 
Registration Rights........  The Company has filed a registration statement on
                             Form S-4 (together with any amendments thereto, the
                             "Registration Statement") with respect to the
                             Exchange Offer made hereby, and has agreed to use
                             its best efforts to cause the Registration
                             Statement to become effective on or prior to
                             November 21, 1998. In the event that any changes in
                             law or the applicable interpretations of the staff
                             of the Commission do not permit the Company to
                             effect the Exchange Offer made hereby, if the
                             Exchange Offer is not consummated on or prior to
                             December 21, 1998 for any reason attributable to
                             actions or inactions of the Company, or under
                             certain other circumstances, the Company will, as
                             promptly as practicable, file with the Commission a
                             shelf registration statement with respect to the
                             resale of the Existing Notes (the "Shelf
                             Registration Statement"), use its best efforts to
                             cause such Shelf Registration Statement to become
                             effective generally within 30 days after the date
                             on which the Company is required to file the Shelf
                             Registration Statement, and to keep the Shelf
                             Registration Statement effective for a period of
                             two years after the effective date thereof (unless
                             extended by certain events described in the
                             Registration Agreement) or for such shorter period
                             that will terminate when all the Existing Notes
                             have been sold pursuant to the Shelf Registration
                             Statement or are eligible for sale under Rule
                             144(k) of the Securities Act. Because the
                             Registration Statement was not declared effective
                             by November 21, 1998, the Company may be required
                             to file the Shelf Registration Statement. Upon
                             consummation of the Exchange Offer, the Company
                             generally will have no further obligation to
                             register the Existing Notes. See "The Exchange
                             Offer -- Registration Agreement" and
                             "-- Termination of Certain Rights."
 
                                        9
<PAGE>   14
 
Termination of Certain
Rights.....................  Holders of Exchange Notes will not be entitled to
                             certain rights under the Registration Agreement,
                             including the right to require the Company to file
                             a registration statement with respect to the
                             Exchange Notes, and to file a Shelf Registration
                             Statement, except in certain limited circumstances.
                             See "The Exchange Offer -- Termination of Certain
                             Rights."
 
Absence of a Public Market
for the Exchange Notes.....  The Exchange Notes will be new securities for which
                             there currently is no market. Although the Initial
                             Purchasers have informed the Company that they
                             currently intend to make a market in the Exchange
                             Notes, they are not obligated to do so, and any
                             such market making may be discontinued at any time
                             without notice. Accordingly, there can be no
                             assurance as to the development or liquidity of any
                             market for the Exchange Notes. The Company does not
                             intend to apply for listing of the Exchange Notes
                             on any securities exchange or seek the admission
                             thereof to trading on The Nasdaq Stock Market. See
                             "Risk Factors -- Absence of Public Market for the
                             Notes; Volatility; Restrictions on Resale."
 
Use of Proceeds............  The Company will not receive any proceeds from the
                             Exchange Offer. The net proceeds to the Company
                             from the sale of the Existing Notes were used: (i)
                             to pay the purchase price of the Acquisition; (ii)
                             to repay the Company's Outstanding Indebtedness (as
                             defined); (iii) to retire a portion of the
                             Company's Series A Preferred Stock; (iv) to pay
                             accumulated interest and dividends, fees and
                             expenses associated with the Transactions (as
                             defined) (other than the Management Buy-Out); and
                             (v) for general corporate purposes. See "The
                             Exchange Offer -- Use of Proceeds."
 
     For further information regarding the Exchange Notes, see "Description of
the Notes."
 
                                       10
<PAGE>   15
 
                   SUMMARY UNAUDITED PRO FORMA FINANCIAL DATA
 
     The following table sets forth the summary unaudited pro forma financial
information for the Company. This information is derived from the Unaudited Pro
Forma Financial Data appearing elsewhere in this Prospectus that gives effect to
the Private Offering, the Acquisition, the Management Buy-Out, the repayment of
Aqua-Chem's Outstanding Indebtedness (as defined), the execution of the New
Credit Facility, the retirement of a portion of Aqua-Chem's Series A Preferred
Stock, and the payment of accrued interest and dividends, fees and expenses in
connection with the foregoing (collectively, the "Transactions"). See "The
Exchange Offer -- Use of Proceeds."
 
     The pro forma statement of operations data and other financial data for the
twelve months ended December 31, 1997 and the nine months ended September 30,
1998 give effect to the Transactions as if the Transactions had occurred on
January 1, 1997. The balance sheet data as of September 30, 1998 represents
actual, rather than pro forma, data. The summary unaudited pro forma financial
data is presented for comparative and informational purposes only and is not
necessarily indicative of future results or of the results that would have been
obtained had the Transactions assumed therein actually been completed on the
dates indicated. The pro forma data presented below should be read in
conjunction with the "Unaudited Pro Forma Financial Data" and the financial
statements of Aqua-Chem and of NDC included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                               TWELVE MONTHS           NINE MONTHS
                                                                   ENDED                  ENDED
                                                             DECEMBER 31, 1997      SEPTEMBER 30, 1998
                                                             -----------------      ------------------
                                                               (DOLLARS IN THOUSANDS, EXCEPT RATIOS)
<S>                                                          <C>                    <C>
STATEMENT OF OPERATIONS DATA:
Net sales..................................................      $249,265                $164,399
Cost of goods sold.........................................       186,117                 125,152
                                                                 --------                --------
Gross margin...............................................        63,148                  39,247
Selling, general and administrative expenses...............        45,986                  33,027
Restructuring charges......................................            --                   4,720
                                                                 --------                --------
Operating income...........................................        17,162                   1,500
OTHER FINANCIAL DATA:
EBITDA(a)..................................................      $ 23,000                $  5,722
Adjusted EBITDA(b).........................................        23,687                  10,172
Depreciation and amortization..............................         5,838                   4,222
Capital expenditures.......................................         4,811                   2,171
Cash interest expense(c)...................................        14,063                  10,547
Ratio of total debt to Adjusted EBITDA(b)(d)...............           5.3x                     --(e)
Ratio of Adjusted EBITDA to cash interest expense(b)(c)....           1.7x                     --(e)
Ratio of earnings to fixed charges(f)......................           1.2x                     --(g)
BALANCE SHEET DATA (AT END OF PERIOD):
Total assets...............................................                              $181,523
Total debt.................................................                               125,000
Stockholders' deficit......................................                                (2,914)
</TABLE>
 
- ------------------------------------
(a) EBITDA is defined as operating income before depreciation and amortization.
    While EBITDA is not intended to represent cash flow from operations as
    defined by GAAP and should not be considered as an indicator of operating
    performance or an alternative to cash flow (as measured by GAAP) as a
    measure of liquidity, management believes it provides additional information
    with respect to the ability of a company to meet its future debt service,
    capital expenditures and working capital requirements. EBITDA should be
    evaluated in conjunction with the Company's cash flows from operating,
    investing and financing activities. When evaluating EBITDA, investors should
    also consider the Company's minimum annual principal repayments of long-term
    debt and other long-term commitments as well as cash flows from operating,
    investing, and financing activities. See the Consolidated Statements of Cash
    Flows of
 
                                       11
<PAGE>   16
 
    Aqua-Chem and of NDC and the related notes thereto included in this
    Prospectus. In addition, investors should consider the Company's discussion
    of liquidity and capital resources as disclosed within Management's
    Discussion and Analysis of Financial Condition and Results of Operations of
    Aqua-Chem and Management's Discussion and Analysis of Financial Condition
    and Results of Operations of NDC. The measure of EBITDA presented above may
    not be comparable to similarly titled measures of other companies.
 
(b) Adjusted EBITDA for the periods presented is EBITDA, excluding for the year
    ended December 31, 1997 and for the nine months ended September 30, 1998
    $687 and $1,429, respectively of non-cash purchase accounting adjustments to
    cost of goods sold related to writing up inventory to fair market value at
    the time of Management Buy-Out and the Acquisition, respectively, and for
    all periods presented, excluding non-cash restructuring charges, as set
    forth below:
 
<TABLE>
<CAPTION>
                                                        TWELVE MONTHS         NINE MONTHS
                                                            ENDED                ENDED
                                                      DECEMBER 31, 1997    SEPTEMBER 30, 1998
                                                      -----------------    ------------------
<S>                                                  <C>                   <C>
EBITDA.............................................        $23,000              $ 5,722
  Non-cash purchase accounting adjustment..........            687                1,429
  Restructuring charges (i)........................             --                3,021
                                                           -------              -------
Adjusted EBITDA....................................        $23,687              $10,172
                                                           =======              =======
</TABLE>
 
- ------------------------------------
    (i) For the nine months ended September 30, 1998, the Company recorded a
        charge of $4,720 related to the 1998 Restructuring which consisted of
        $3,021 to write down the value of certain fixed assets and inventory,
        $1,460 of employee termination benefits and $239 of other costs. As the
        $3,021 to write down the value of certain fixed assets and inventory is
        a non-cash charge, it is reflected as an adjustment to EBITDA in order
        to evaluate EBITDA before non-cash 1998 Restructuring Charges. Investors
        should also consider that the Company anticipates capital expenditures
        of approximately $1,500 within the year following the closure of the
        Greenville facility to accommodate increased production levels at other
        manufacturing facilities. In addition to the 1998 Restructuring actions,
        the Company will in-source certain boiler components currently procured
        from third parties that either Cleaver-Brooks or National Dynamics
        already produces. Management has estimated the annual cash savings from
        the 1998 Restructuring and the in-sourcing of the certain boiler
        components to be approximately $2,300, which are not reflected in the
        computation of Adjusted EBITDA.
 
(c) Calculated using an interest rate of 11.25% per annum on the Notes excluding
    non-cash amortization of deferred financing costs.
 
(d) The ratio of total debt to Adjusted EBITDA is calculated using actual total
    debt as of September 30, 1998, which management believes would have
    approximated pro forma total debt as of December 31, 1997 had a pro forma
    balance sheet been prepared as of such date, and Adjusted EBITDA for the
    twelve months ended December 31, 1997.
 
(e) Due to the seasonal nature of the Company's business, the ratios of Adjusted
    EBITDA to cash interest expense and total debt to Adjusted EBITDA for the
    nine months ended September 30, 1998 are not accurate representations of
    full year results.
 
(f) For purposes of calculating the ratio of earnings to fixed charges, earnings
    represent income (loss) before taxes, extraordinary item and fixed charges.
    Fixed charges consist of the total of (i) interest, whether expensed or
    capitalized, and (ii) amortization of debt expense and discount or premium
    relating to any indebtedness, whether expensed or capitalized.
 
(g) Earnings would have been inadequate to cover fixed charges by $8,706 for the
    nine months ended September 30, 1998.
 
                                       12
<PAGE>   17
 
                 SUMMARY HISTORICAL FINANCIAL DATA OF AQUA-CHEM
 
     The following summary historical financial data of Aqua-Chem as of and for
each of the fiscal years ended December 31, 1995 and 1996, the seven-month
period ended July 31, 1997, the five-month period ended December 31, 1997, the
two-month period ended September 30 1997 and the nine months ended September 30,
1998, has been derived from the consolidated financial statements of Aqua-Chem.
The summary pro forma financial data for the twelve months ended December 31,
1997 has been prepared to reflect the financial results of Aqua-Chem for the
seven-month period from January 1, 1997 through July 31, 1997 (while under prior
ownership) and the five-month period from August 1, 1997 through December 31,
1997 (following the Management Buy-Out), after giving effect to the purchase
accounting adjustments for the Management Buy-Out as if the Management Buy-Out
occurred on January 1, 1997 (see Note (a) to the Unaudited Pro Forma
Consolidated Statements of Operations for the year ended December 31, 1997 under
"Unaudited Pro Forma Financial Data"). The financial data for Aqua-Chem before
and after the Management Buy-Out is not comparable in all material respects.
This summary historical financial data should be read in conjunction with
"Management's Discussion and Analysis of Financial Condition and Results of
Operations of Aqua-Chem" and the consolidated financial statements of Aqua-Chem
included elsewhere in this Prospectus.
<TABLE>
<CAPTION>
                                                                                             PRO FORMA
                                       FISCAL YEARS ENDED    SEVEN MONTHS   FIVE MONTHS    TWELVE MONTHS   SEVEN MONTHS
                                          DECEMBER 31,          ENDED          ENDED           ENDED          ENDED
                                       -------------------     JULY 31,     DECEMBER 31,   DECEMBER 31,      JULY 31,
                                         1995       1996       1997(A)        1997(A)          1997          1997(A)
                                       --------   --------   ------------   ------------   -------------   ------------
                                                            (DOLLARS IN THOUSANDS, EXCEPT RATIOS)
<S>                                    <C>        <C>        <C>            <C>            <C>             <C>
STATEMENT OF OPERATIONS DATA:
Net sales............................  $183,368   $199,552     $99,618        $ 91,541       $191,159        $ 99,618
Cost of goods sold...................   148,650    153,446      73,656          66,333        140,950          73,656
                                       --------   --------     -------        --------       --------        --------
Gross margin.........................    34,718     46,106      25,962          25,208         50,209          25,962
Selling, general and administrative
 expenses............................    37,772     34,446      23,323          17,136         39,376          23,323
Restructuring charges(b).............     4,593      5,038          --              --             --              --
                                       --------   --------     -------        --------       --------        --------
Operating income (loss)..............  $ (7,647)  $  6,622     $ 2,639        $  8,072       $ 10,833        $  2,639
OTHER FINANCIAL DATA:
EBITDA(c)............................  $ (4,494)  $  9,606     $ 4,329        $  9,356       $ 15,078        $  4,329
Adjusted EBITDA(d)...................    (3,286)    10,017       4,329          10,043         15,765           4,329
Depreciation and amortization........     3,153      2,984       1,690           1,284          4,245           1,690
Gross profit margin..................      18.9%      23.1%       26.1%           27.5%          26.3%           26.1%
Capital expenditures.................  $  4,867   $  2,789     $ 2,195        $  1,197       $  3,392        $  2,195
Cash provided by (used for) operating
 activities..........................    (1,551)     8,052       4,857           9,311                          4,857
Cash provided by (used for) investing
 activities..........................      (939)    (1,025)       (881)        (50,699)                          (881)
Cash provided by (used for) financing
 activities..........................       538      1,492           6          40,715                              6
Ratio of earnings to fixed
 charges(e)..........................        --(f)     4.2x        4.0x            3.2x           1.9x            4.0x
BALANCE SHEET DATA (AT END OF
 PERIOD):
Total assets.........................  $101,381   $101,000     $    --        $124,661                       $104,137
Total debt...........................    18,636     20,128          --          59,691                         20,134
Stockholders' equity (deficit).......    36,636     39,960          --           3,638                         41,408
 
<CAPTION>
 
                                        TWO MONTHS      NINE MONTHS
                                           ENDED           ENDED
                                       SEPTEMBER 30,   SEPTEMBER 30,
                                          1997(A)          1998
                                       -------------   -------------
<S>                                    <C>             <C>
STATEMENT OF OPERATIONS DATA:
Net sales............................    $ 35,875        $142,734
Cost of goods sold...................      26,129         107,820
                                         --------        --------
Gross margin.........................       9,746          34,914
Selling, general and administrative
 expenses............................       6,993          29,178
Restructuring charges(b).............          --           4,720
                                         --------        --------
Operating income (loss)..............    $  2,753        $  1,016
OTHER FINANCIAL DATA:
EBITDA(c)............................    $  3,557        $  4,415
Adjusted EBITDA(d)...................       4,244           5,844
Depreciation and amortization........         804           3,399
Gross profit margin..................        27.2%           24.5%
Capital expenditures.................    $    641        $  1,772
Cash provided by (used for) operating
 activities..........................         415         (12,833)
Cash provided by (used for) investing
 activities..........................     (52,692)        (49,617)
Cash provided by (used for) financing
 activities..........................      41,711          56,628
Ratio of earnings to fixed
 charges(e)..........................         2.8x             --(f)
BALANCE SHEET DATA (AT END OF
 PERIOD):
Total assets.........................    $117,307        $181,523
Total debt...........................      60,687         125,000
Stockholders' equity (deficit).......       1,525          (2,914)
</TABLE>
 
- ------------------------------------
(a) On July 31, 1997, Aqua-Chem management and its shareholders acquired
    Aqua-Chem in the Management Buy-Out, which was treated as a purchase. As a
    result, all periods presented prior to August 1, 1997 were prepared using
    Aqua-Chem's historical basis of accounting. All periods presented subsequent
    to July 31, 1997 reflect the fair values of the assets acquired and
    liabilities assumed in the Management Buy-Out.
 
(b) For 1995, reflects restructuring charges required to complete the 1994
    Restructuring. For 1996, reflects restructuring charges required to complete
    the 1996 Restructuring. For the nine months ended September 30, 1998,
    reflects restructuring charges to complete the 1998 Restructuring. For
    further information on such restructurings, see "Management's Discussion and
    Analysis of Financial Condition and Results of Operations of Aqua-Chem,"
    Note (3) to the consolidated financial statements of Aqua-Chem and Note (7)
    to the consolidated condensed interim financial statements of Aqua-Chem, all
    included elsewhere in this Prospectus.
 
                                       13
<PAGE>   18
 
(c) EBITDA is defined as operating income before depreciation and amortization.
    While EBITDA is not intended to represent cash flow from operations as
    defined by GAAP and should not be considered as an indicator of operating
    performance or an alternative to cash flow (as measured by GAAP) as a
    measure of liquidity, management believes it provides additional information
    with respect to the ability of a company to meet its future debt service,
    capital expenditures and working capital requirements. EBITDA should be
    evaluated in conjunction with the Company's cash flows from operating,
    investing and financing activities. When evaluating EBITDA, investors should
    also consider the Company's minimum annual principal repayments of long-term
    debt and other long-term commitments as well as cash flows from operating,
    investing, and financing activities. See the Consolidated Statements of Cash
    Flows of Aqua-Chem and of NDC and the related notes thereto included in this
    Prospectus. In addition, investors should consider the Company's discussion
    of liquidity and capital resources as disclosed within Management's
    Discussion and Analysis of Financial Condition and Results of Operations of
    Aqua-Chem and Management's Discussion and Analysis of Financial Condition
    and Results of Operations of NDC. The measure of EBITDA presented above may
    not be comparable to similarly titled measures of other companies.
 
(d) Adjusted EBITDA for the periods presented is defined as EBITDA excluding
    non-cash restructuring charges and, for the pro forma twelve months ended
    December 31, 1997, the five months ended December 31, 1997 and for the two
    months ended September 30, 1997, excludes $687 of non-cash purchase
    accounting adjustments to cost of goods sold related to writing up inventory
    to fair market value at the time of the Management Buy-Out. For the nine
    months ended September 30, 1998, $1,429 of non-cash purchase accounting
    adjustments are excluded to reflect the non-cash purchase accounting
    adjustments to cost of goods sold related to writing up inventory to fair
    market value at the time of the Acquisition.
 
(e) For purposes of calculating the ratio of earnings to fixed charges, earnings
    represent income (loss) before taxes, extraordinary item and fixed charges.
    Fixed charges consist of the total of (i) interest, whether expensed or
    capitalized; (ii) amortization of debt expense and discount or premium
    relating to any indebtedness, whether expensed or capitalized.
 
(f) Earnings were inadequate to cover fixed charges by $6,265 and $5,492 for the
    year ended December 31, 1995 and the nine months ended September 30, 1998,
    respectively.
 
                                       14
<PAGE>   19
 
                    SUMMARY HISTORICAL FINANCIAL DATA OF NDC
 
     The following summary historical financial data of NDC as of and for each
of the fiscal years ended October 31, 1995, 1996 and 1997, and for the five
months ended March 31, 1997 and 1998 have been derived from the financial
statements of NDC. This summary historical financial data should be read in
conjunction with "Management's Discussion and Analysis of Financial Condition
and Results of Operations of NDC" and the financial statements of NDC included
elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                     FISCAL YEARS ENDED        FIVE MONTHS ENDED
                                                         OCTOBER 31,               MARCH 31,
                                                 ---------------------------   -----------------
                                                  1995      1996      1997      1997      1998
                                                 -------   -------   -------   -------   -------
                                                      (DOLLARS IN THOUSANDS, EXCEPT RATIOS)
<S>                                              <C>       <C>       <C>       <C>       <C>
STATEMENT OF OPERATIONS DATA:
Net sales......................................  $48,457   $54,845   $58,106   $21,720   $24,970
Cost of goods sold.............................   39,740    43,646    45,066    17,117    19,576
                                                 -------   -------   -------   -------   -------
Gross margin...................................    8,717    11,199    13,040     4,603     5,394
Selling, general and administrative expenses...    6,601     5,515     5,815     1,888     2,472
                                                 -------   -------   -------   -------   -------
Operating income...............................    2,116     5,684     7,225     2,715     2,922
OTHER FINANCIAL DATA:
EBITDA(a)......................................  $ 2,566   $ 6,147   $ 7,722   $ 2,908   $ 3,122
Gross profit margin............................     18.0%     20.4%     22.4%     21.2%     21.6%
Depreciation...................................  $   450   $   463   $   497   $   193   $   200
Capital expenditures...........................    1,758       571     1,419       262       222
Cash provided by (used in) operating
  activities...................................       54     5,427     5,263     3,159     6,822
Cash provided by (used in) investing
  activities...................................   (1,176)     (571)   (1,419)     (262)     (222)
Cash provided by (used in) financing
  activities...................................    1,084    (4,739)   (4,000)   (2,572)   (3,122)
Ratio of earnings to fixed charges(b)..........     16.0x    134.4x     41.1x     39.9x     54.6x
BALANCE SHEET DATA (AT END OF PERIOD):
Total assets...................................  $23,600   $22,144   $25,991   $22,166   $24,076
Total debt.....................................    2,441     1,472     1,422        --        --
Stockholders' equity...........................    8,161    10,609    13,997    13,049    16,055
</TABLE>
 
- ------------------------------------
(a) EBITDA is defined as operating income before depreciation and amortization.
    While EBITDA is not intended to represent cash flow from operations as
    defined by GAAP and should not be considered as an indicator of operating
    performance or an alternative to cash flow (as measured by GAAP) as a
    measure of liquidity, management believes it provides additional information
    with respect to the ability of a company to meet its future debt service,
    capital expenditures and working capital requirements. EBITDA should be
    evaluated in conjunction with the Company's cash flows from operating,
    investing and financing activities. When evaluating EBITDA, investors should
    also consider the Company's minimum annual principal repayments of long-term
    debt and other long-term commitments as well as cash flows from operating,
    investing, and financing activities. See the Consolidated Statements of Cash
    Flows of Aqua-Chem and of NDC and the related notes thereto included in this
    Prospectus. In addition, investors should consider the Company's discussion
    of liquidity and capital resources as disclosed within Management's
    Discussion and Analysis of Financial Condition and Results of Operations of
    Aqua-Chem and Management's Discussion and Analysis of Financial Condition
    and Results of Operations of NDC. The measure of EBITDA presented above may
    not be comparable to similarly titled measures of other companies.
 
(b) For purposes of calculating the ratio of earnings to fixed charges, earnings
    represent income before taxes and fixed charges. Fixed charges consist of
    the total of (i) interest, whether expensed or capitalized; and (ii)
    amortization of debt expense and discount or premium relating to any
    indebtedness, whether expensed or capitalized.
 
                                       15
<PAGE>   20
 
                                  RISK FACTORS
 
     HOLDERS OF EXISTING NOTES SHOULD CONSIDER CAREFULLY ALL OF THE INFORMATION
SET FORTH IN THIS PROSPECTUS AND, IN PARTICULAR, SHOULD EVALUATE THE FOLLOWING
RISKS BEFORE TENDERING THEIR EXISTING NOTES IN THE EXCHANGE OFFER, ALTHOUGH THE
RISK FACTORS SET FORTH BELOW ARE GENERALLY APPLICABLE TO THE EXISTING NOTES AS
WELL AS THE EXCHANGE NOTES.
 
CONSEQUENCES OF FAILURE TO EXCHANGE
 
     Holders of Existing Notes who do not exchange them for Exchange Notes
pursuant to the Exchange Offer will continue to be subject to certain
restrictions on transfer of such Existing Notes. In general, the Existing Notes
may not be reoffered or resold by their holders except pursuant to an effective
registration statement under the Securities Act or pursuant to an applicable
exemption from such registration, and the Existing Notes are legended to so
restrict their transfer. Based on interpretations by the staff of the SEC, as
set forth in no-action letters issued to third parties, the Company believes
that each holder (other than any holder who is an "affiliate" of the Company
within the meaning of Rule 405 under the Securities Act) who duly exchanges
Existing Notes for Exchange Notes in the Exchange Offer will receive Exchange
Notes that are freely transferable under the Securities Act, provided that such
Exchange Notes are acquired in the ordinary course of such holder's business and
that such holder is not engaged in, and does not intend to engage in, a
distribution of such Exchange Notes and has no arrangement or understanding with
any person to participate in the distribution of such Exchange Notes. By
tendering Existing Notes and executing the Letter of Transmittal, the holder
thereof shall represent and agree that (i) it is neither an affiliate of the
Company nor a broker-dealer tendering Existing Notes acquired directly from the
Company for its own account, (ii) it acquired the Exchange Notes in the ordinary
course of its business and (iii) it is not engaged in, and does not intend to
engage in, a distribution of the Exchange Notes and it has no arrangement or
understanding to participate in a distribution of Exchange Notes. The SEC,
however, has not considered the Exchange Offer in the context of a no-action
letter, and therefore there can be no assurance that the staff of the SEC would
make a similar determination with respect to the Exchange Offer as in such other
circumstances. Holders of Existing Notes who participate in such Exchange Offer
should be aware, however, that, except in the case of certain broker-dealers as
described below, if they accept Exchange Notes in the Exchange Offer for the
purpose of engaging in secondary resales, such Exchange Notes may not be
publicly reoffered or resold without complying with the registration and
prospectus delivery requirements of the Securities Act. The same registration
and prospectus delivery requirements would apply to any holder who is an
"affiliate" of the Company within the meaning of Rule 405 under the Securities
Act. Each broker-dealer that receives Exchange Notes for its own account in
exchange for Existing Notes, where such Existing Notes were acquired by such
broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Notes. See "The Exchange Offer" and "Plan of
Distribution."
 
     The Existing Notes may be sold without registration under the Securities
Act pursuant to the restrictions set forth in Rule 144A or Regulation S.
 
SUBSTANTIAL LEVERAGE; ABILITY TO SERVICE THE NOTES
 
     As a result of the Private Offering, the Company has substantial
indebtedness and significant debt service obligations. At September 30, 1998 the
Company had total long-term indebtedness, including current maturities, of
$125.0 million, as well as undrawn borrowing availability under the New Credit
Facility of $45.0 million. The Indenture permits the Company to incur additional
indebtedness, including secured indebtedness, subject to certain limitations.
See "The Exchange Offer -- Use of Proceeds," "Capitalization," "Description of
Certain Indebtedness," and "Description of the Notes -- Certain Covenants."
 
     The Company's high degree of leverage could have important consequences to
holders of the Notes, including, without limitation: (i) a substantial portion
of the Company's cash flow from operations will be committed to the payment of
principal and interest on its indebtedness, thereby reducing the funds available
to the Company for its operations and other purposes; (ii) the Company's ability
to obtain additional financing in the future for working capital expenditures,
acquisitions or other purposes may be limited; (iii) a substantial
                                       16
<PAGE>   21
 
decrease in net operating cash flows or an increase in expenses could make it
difficult for the Company to meet its debt service requirements and force it to
modify its operations; (iv) the Company may be more highly leveraged than its
competitors, which may place it at a competitive disadvantage; (v) certain
indebtedness under the New Credit Facility is at variable rates of interest,
which will cause the Company to be vulnerable to increases in interest rates;
and (vi) all of the indebtedness outstanding under the New Credit Facility is
secured by substantially all the assets of the Company and becomes due prior to
the time the principal on the Notes becomes due. See "Description of Certain
Indebtedness" and "Description of the Notes."
 
     The Indenture prohibits the Company from incurring additional Indebtedness
unless, on the date of such incurrence and after giving effect thereto, the
Consolidated Coverage Ratio exceeds 2.0 to 1 if such Indebtedness is incurred
prior to January 1, 2000, 2.25 to 1 if such Indebtedness is incurred on or after
January 1, 2000 and prior to July 1, 2001 or 2.5 to 1 thereafter (the "Coverage
Limitation"). As of June 30, 1998, the Company could not have incurred any
additional Indebtedness under the Coverage Limitation.
 
     The Indenture further provides that, in addition to the additional
Indebtedness which the Company may incur under the Coverage Limitation, the
Company may incur additional Indebtedness of certain types up to certain
limitations applicable to each type (the "Basket Limitations"). The basket
limitations are described under "Description of the Notes -- Certain Covenants
- -- Limitation on Indebtedness." The amount of additional Indebtedness which the
Company could have incurred as of September 30, 1998 under certain of the Basket
Limitations is impossible to quantify as of the date of this Prospectus because
those Basket Limitations relate to transactions or other events or conditions
that had not occurred or did not exist as of such date, and the applicable
dollar limitations thereunder depend upon the nature of such events or the
nature and terms of such transactions. Certain of the Basket Limitations relate
to intercompany transactions and guarantees, which would not increase the
aggregate amount of additional Indebtedness that may be incurred. However, the
Company could have incurred approximately $77.3 million of additional
Indebtedness under the remaining Basket Limitations on September 30, 1998,
including the following: (a) Indebtedness pursuant to the New Credit Facility of
up to the greater of (i) $45.0 million or (ii) the sum of 50% of the book value
of inventory and 85% of the book value of accounts receivable as of such date
(however, the limitation under clause (ii) would have been approximately $54.2
million at September 30, 1998; this limitation would not have affected the
maximum amount that could have been borrowed under the New Credit Facility as of
September 30, 1998 because the maximum amount of the New Credit Facility on that
date was $45.0 million); (b) Indebtedness by foreign subsidiaries not exceeding
the sum of (i) 60% of the book value of inventory and (ii) 85% of the book value
of accounts receivable; (c) purchase money Indebtedness not exceeding the
greater of (i) $20 million or (ii) 5% of the consolidated net worth of the
Company; and (d) an additional $10 million without regard to the nature or
purpose of such Indebtedness.
 
     The Company's ability to make scheduled payments of the principal of, or to
pay interest on, or to refinance its indebtedness (including the Notes) will
depend on the Company's future performance, which to a certain extent will be
subject to economic, financial, competitive and other factors beyond its
control. There can be no assurance, however, that the Company's business will
continue to generate sufficient cash flow from operations in the future to
service its indebtedness and make necessary capital expenditures. If it is
unable to do so, the Company may be required to refinance all or a portion of
its indebtedness, including the Notes, to sell assets or to obtain additional
financing. There can be no assurance that any such refinancing would be
possible, that any assets could be sold (or, if sold, of the timing of such
sales and the amount of proceeds realized therefrom) or that additional
financing could be obtained.
 
IMPLEMENTATION OF BUSINESS STRATEGY
 
     The Company intends to continue the implementation of its business
strategy, elements of which are to improve manufacturing efficiency and make
strategic acquisitions. The Company's ability to successfully implement its
business strategy is subject to a number of factors, many of which are beyond
the control of the Company. There can be no assurance that the Company will be
able to continue to successfully implement its business strategy following the
Private Offering and a failure to successfully implement its business strategy
may have a material adverse effect on the Company's results of operations. See
"Summary -- Business Strategy."
 
                                       17
<PAGE>   22
 
     Realizing the full benefits of any acquisition may require the integration
of one or more of the acquired company's administrative, finance, manufacturing,
engineering, sales, or marketing functions with those of the Company and the
implementation of appropriate operations, financial and management systems and
controls in order to capture anticipated efficiencies, manufacturing
improvements and cost reductions. These efforts would require substantial
attention from the Company's management team. The diversion of management
attention, as well as any other difficulties which may be encountered in such a
transition and integration process, could have a material adverse impact on the
revenue and operating results of the Company. There can be no assurance that the
Company will be able to realize the potential benefits of any such acquisition.
If any such acquisition is completed, the failure to achieve a substantial
portion of the anticipated benefits could have a material adverse impact on the
Company.
 
CYCLICAL NATURE OF INDUSTRY; POTENTIAL FLUCTUATIONS IN OPERATING RESULTS
 
     The Company's business is cyclical in nature and sensitive to changes in
general economic conditions, including the rate of expansion and new
construction by its customers, and the associated demand for new boilers. The
Company's customers are in turn influenced by a variety of factors beyond the
Company's control, including interest rates, currency exchange rates, and
general economic conditions throughout the world. The Company has experienced,
and in the future could experience, reduced net sales and margins, which may
affect the Company's ability to satisfy its debt service obligations, including
payments on the Notes, on a timely basis. The Company's boiler business is also
seasonal in nature and net sales and operating results may fluctuate
significantly from quarter to quarter. See "Management's Discussion and Analysis
of Financial Condition and Results of Operations of Aqua-Chem" and "Management's
Discussion and Analysis of Financial Condition and Results of Operations of
NDC."
 
     Given the magnitude of certain of the Company's water purification and
treatment projects, one or a limited number of projects may account for a
substantial portion of net sales in any particular period. Although the Company
recognizes net sales on a percentage-of-completion basis for new projects, the
timing of one or a small number of contracts in any particular period may
nevertheless affect operating results, and the profitability of these projects
can vary from original estimates. In addition, net sales and gross margin may
fluctuate depending upon the size and the requirements of the particular
contracts entered into in that period. As a result of these and other factors,
the Company may experience significant fluctuations in net sales and operating
results in future periods. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations of Aqua-Chem."
 
REALIZATION OF BENEFITS OF THE ACQUISITION
 
     On June 23, 1998, Aqua-Chem completed the purchase of substantially all of
the assets of NDC. Management has estimated that cost savings and other benefits
can be achieved as a result of the Acquisition. The estimates of potential cost
savings and other benefits are forward-looking statements that are inherently
uncertain, and actual results could differ materially from those anticipated.
All of these forward-looking statements are based on estimates and assumptions
made by management, which although believed to be reasonable, are inherently
uncertain and difficult to predict; therefore, undue reliance should not be
placed upon such estimates.
 
     Full realization of the potential benefits and savings of the Acquisition
will be dependent upon a variety of factors, including (i) rationalization of
manufacturing facilities; (ii) retention of a substantial portion of NDC's
sales; and (iii) successful application of Aqua-Chem's modern manufacturing
practices to increase efficiency in the production of NDC products. Full
realization of the potential annual benefits and savings is expected to occur
within two years of the acquisition date. The Company estimates that the costs
associated with the retention of NDC's sales and implementation of modern
manufacturing techniques at former NDC facilities will be less than $0.4
million. The Company expects to incur certain costs associated with the
rationalization of the manufacturing facilities, such as manufacturing
inefficiencies in the production of products transferred from other facilities,
which, due to their nature, cannot be practically estimated, but which may have
a material adverse effect on the Company's results of operations. The Company
does not expect these costs to exceed $0.7 million over a 24-month period and
does not believe that they will have a material adverse impact on its results of
operations. Any material delays or unexpected costs incurred in
 
                                       18
<PAGE>   23
 
connection with the integration of Aqua-Chem and NDC could have a material
adverse effect on the Company and its results of operations, liquidity and
financial condition.
 
     The Company has no previous experience acquiring or integrating a business
as large as NDC, and the successful integration of Aqua-Chem and NDC will
require substantial attention from the Company's management team. The diversion
of management's attention, as well as any other difficulties which may be
encountered in the transition and integration process, could have a material
adverse effect on the revenue and operating results of the Company. There can be
no assurance that the Company will be able to integrate the operations of
Aqua-Chem and NDC successfully or the extent to which the Company will be able
to realize the potential benefits of the Acquisition or the timing of any such
benefits. Failure to achieve a substantial portion of these benefits within the
time frame expected by the Company could have a material adverse effect on the
Company, including its ability to make payments on the Notes. See "Unaudited Pro
Forma Financial Data" and "The Acquisition."
 
RESTRICTIVE DEBT COVENANTS
 
     The terms of the New Credit Facility and the Indenture contain numerous
covenants that limit the discretion of management with respect to certain
business matters and place significant restrictions on, among other things, the
ability of the Company to incur additional indebtedness, to create liens or
other encumbrances, to make certain payments or investments, loans and
guarantees and to sell or otherwise dispose of assets and merge or consolidate
with another entity. See "Description of Certain Indebtedness" and "Description
of the Notes -- Certain Covenants."
 
     The New Credit Facility also contains a number of financial covenants that
require the Company to maintain certain financial ratios (including a fixed
charge coverage ratio and a funded debt to EBITDA ratio) and tests (including
maintenance of the Company's net worth at a specified level). A breach of any of
these covenants or the inability of the Company to comply with the required
financial ratios could result in an event of default under the New Credit
Facility or under the Indenture. In the event of any such default, depending on
the actions taken by the lenders under the New Credit Facility, the Company
could be prohibited from making any payments of principal or interest on the
Notes. In addition, the lenders under the New Credit Facility could elect to
declare all amounts borrowed thereunder, together with accrued interest, to be
due and payable. If the Company were unable to repay such borrowings, such
lenders could proceed against their collateral. If the indebtedness under the
New Credit Facility were to be accelerated, there can be no assurance that the
assets of the Company would be sufficient to repay such indebtedness and the
Notes in full. See "-- Substantial Leverage; Ability to Service the Notes," "--
Ranking of the Notes," "Description of Certain Indebtedness" and "Description of
the Notes -- Ranking."
 
RANKING OF THE NOTES
 
     The indebtedness evidenced by the Existing Notes is, and by the Exchange
Notes will be, general unsecured senior subordinated obligations of the Company,
subordinated in right of payment to all Senior Indebtedness of the Company,
including all indebtedness under the New Credit Facility. As of September 30,
1998, the Company had no outstanding Senior Indebtedness; however, the Company
had approximately $45.0 million of borrowing availability under the New Credit
Facility, all of which, when borrowed, will be Senior Indebtedness, and will be
secured by substantially all the assets of the Company. The Indenture and the
New Credit Facility permit the Company to incur additional Senior Indebtedness
in the future, subject to certain conditions. Moreover, the Indenture does not
limit the Company's ability to secure Senior Indebtedness.
 
     In the event of the bankruptcy, administration, insolvency, liquidation,
reorganization, dissolution or other winding-up of the Company or upon a default
in payment with respect to, or the acceleration of, any Senior Indebtedness, the
lenders under the New Credit Facility and any other creditors who are holders of
Senior Indebtedness must be paid in full before any holder of Notes may be paid.
Accordingly, there may be insufficient assets remaining after such payments to
pay principal of or interest on the Notes. In addition, the subordination
provisions of the Indenture provide that no cash payments may be made with
respect to the Notes during the continuance of a payment default under certain
Senior Indebtedness of the Company. Furthermore, if certain nonpayment defaults
exist with respect to certain Senior Indebtedness, the holders of
                                       19
<PAGE>   24
 
such Senior Indebtedness would be able to prevent payments on the Notes for
certain periods of time. See "Description of the Notes -- Ranking."
 
INTERNATIONAL EXPANSION
 
     The Company currently sells its products internationally primarily through
export from the United States and through foreign manufacturing operations in
Canada and Mexico. During the twelve months ended December 31, 1997, $50
million, or approximately 26%, of Aqua-Chem's net sales were generated outside
the United States. The Company typically transacts international sales and
exports in U.S. dollars.
 
     The Company's strategy to increase export sales will depend on numerous
factors which are beyond its control, including its ability to develop or
acquire additional manufacturing and distribution capabilities outside the
United States. In addition, international expansion may increase the Company's
exposure to certain risks inherent in doing business outside the United States,
such as currency exchange rate fluctuations, restrictions on the repatriation of
profits or dividends, export duties and quotas, domestic and foreign customs and
tariffs, compliance with foreign codes and standards, labor unrest, political
risks and potentially adverse tax consequences. Currently, the Company performs
very few exchange rate hedges as the majority of its sales are denominated in
U.S. currency. There can be no assurance that these factors would not have a
material adverse effect on the Company or its international operations or sales.
See "Summary -- Business Strategy -- Increase International Penetration."
 
CONTROL BY PRINCIPAL SHAREHOLDER
 
     All of the Common Stock and Series C Preferred Stock of the Company is
owned by Rush Creek, of which 51% of the Common Stock and 63% of the Series C
Preferred Stock is allocated to the capital account of Whitney Equity Partners,
L.P. (a fund managed by J. H. Whitney & Co.). See "Capital Stock and Principal
Stockholders" and "Management." Through Rush Creek, Whitney Equity Partners,
L.P. will have the ability to control the management and affairs of the Company
and there may be circumstances under which its interests as a stockholder may
differ from the interests of holders of the Notes. See "Summary -- Company
Ownership."
 
COMPETITION
 
     The Company operates in a highly competitive environment. It competes
directly and indirectly with other manufacturers of industrial and commercial
boilers and water desalination and process evaporation systems, as well as with
manufacturers of parts and components for all of the foregoing. Some of the
Company's competitors are larger, have greater financial resources, and may be
less leveraged than the Company. There can be no assurance that the Company will
be able to compete successfully with its competitors or that competitive
pressures faced by the Company will not materially and adversely affect its
business, operating results or financial condition. See "Business of the
Company -- Boiler Market," "-- Cleaver-Brooks Division -- Sales, Marketing and
Customers," "-- National Dynamics Division -- Sales, Marketing and Customers,"
and "-- Water Technologies Division -- Sales, Marketing and Customers."
 
PRICES OF RAW MATERIALS AND COMPONENT PARTS
 
     The principal raw materials in most of the Company's products are steel,
standard alloys and refractory materials, as well as controls, pumps, motors and
various other component parts. The prices for such raw materials are influenced
by numerous factors beyond the control of the Company, including general
economic conditions, competition, labor costs, import duties and other trade
restrictions and currency exchange rates. Changing prices for such raw materials
may cause the Company's results of operations to fluctuate significantly.
Although the Company has never experienced a material shortage of raw materials,
a large, rapid increase in the price of raw materials could have a material
adverse effect on the Company's operating margins unless and until the increased
cost can be passed along to customers. See "Business of the Company --
Cleaver-Brooks Division -- Raw Materials and Suppliers," "-- National Dynamics
Division -- Raw Materials and Suppliers," and "-- Water Technologies
Division -- Raw Materials and Suppliers."
 
                                       20
<PAGE>   25
 
DEPENDENCE ON KEY PERSONNEL
 
     The Company's success will depend largely on the efforts and abilities of
its executive officers, in particular Mr. Miller, and certain other key
employees, and there can be no assurance that the Company will be able to retain
all such officers and employees. The failure of such key personnel to remain
active in the Company's management could have a material adverse effect on the
Company's operations. See "Management."
 
ENVIRONMENTAL AND RELATED MATTERS
 
     The Company's operations and properties are subject to foreign, federal,
state and local laws and regulations relating to the use, storage, handling,
generation, transportation, treatment, emission, discharge, disposal and
remediation of, and exposure to, hazardous and non-hazardous substances,
materials and wastes. The Company's operations also are subject to laws and
regulations governing employee health and safety. The nature of the Company's
current and former operations exposes it to the risk of liabilities or claims
with respect to environmental matters, including on-site and off-site releases
and emissions of hazardous substances, materials and wastes. There can be no
assurance that the Company will not incur material costs in connection with such
liabilities or claims. In addition, changes in existing laws or regulations, or
the discovery of additional environmental liabilities associated with the
Company's current or former operations, could have a material adverse effect on
the Company's business, results of operations, or financial condition. See
"Business of the Company -- Environmental and Related Matters."
 
PRODUCT LIABILITY LITIGATION
 
     The Company has been named as one of a number of defendants in
approximately 6,400 lawsuits (of which approximately 4,100 are still pending)
alleging personal injury arising from exposure to asbestos-containing materials
allegedly contained in certain boilers manufactured by the Company or its
subsidiaries in the past. There can be no assurance that the ongoing costs and
liabilities associated with current and future asbestos-related litigation will
not have a material adverse effect on the Company's business, results of
operation, or financial condition. See "Business of the Company -- Legal
Proceedings."
 
LABOR RELATIONS
 
     As of September 30, 1998, the Company had approximately 1,428 active
employees, of whom approximately 28% were represented by various unions. There
can be no assurance that additional employees not currently represented by
unions will not elect to be so represented in the future. The Company's
agreements with its unions expire on January 1, 1999 at its facilities in
Mexico; on June 5, 2000 in Stratford, Ontario; on January 19, 2001 in Monroe,
Wisconsin and on November 1, 1999 in Lincoln, Nebraska. There can be no
assurance that such agreements will be renewed when they expire or that the
Company will not experience strikes, work stoppages or other situations. In the
last five years, Aqua-Chem has not experienced any strikes or other work
stoppages; however, in 1994, NDC employees represented by the International
Boilermakers Union went on strike for six weeks in connection with a dispute
over employee contributions for health benefits. The Company has reached an
agreement with the Union representing production workers at its Greenville,
Mississippi facility regarding the transfer of production from, and the closing
of, that facility. Although management believes that its relations with its
employees are satisfactory, a dispute between the Company and its employees
could have a material adverse effect on the Company. See "Business of the
Company -- Properties and Employees."
 
FRAUDULENT CONVEYANCE CONSIDERATIONS
 
     Various fraudulent conveyance laws have been enacted for the protection of
creditors and may be utilized by a court to subordinate or void the Notes (and
payments of principal and/or interest in respect thereof could be voided and
recovered) in favor of other existing or future creditors of the Company.
 
     Proceeds of the Private Offering were used, in part, to repay certain
senior and subordinated debt of the Company. If a court in a lawsuit brought by
an unpaid creditor or representative of creditors, such as a trustee in
bankruptcy or the Company, as a debtor-in-possession, were to find under
relevant federal or state fraudulent conveyance statutes that the Company did
not receive fair consideration or reasonably equivalent
 
                                       21
<PAGE>   26
 
value for issuing the Notes, as the case may be, and that, at the time of such
incurrence, the Company (i) was insolvent; (ii) was rendered insolvent by reason
of such incurrence or grant; (iii) was engaged or about to engage in a business
or transaction for which the assets remaining with the Company, as the case may
be, constituted unreasonably small capital; or (iv) intended to incur, or
believed or reasonably should have believed that it would incur, debts beyond
its ability to pay such debts as they become due, then such court, subject to
applicable statutes of limitation, could void the Notes, subordinate the Notes
to other indebtedness of the Company, or take other action detrimental to the
holders of the Notes.
 
     The measure of insolvency for these purposes will depend upon the governing
law of the relevant jurisdiction. Generally, however, a company will be
considered insolvent for these purposes if the sum of that company's debts is
greater than the fair value of all of that company's property or if the present
fair salable value of that company's assets is less than the amount that will be
required to pay its probable liability on its existing debts as they become
absolute and matured. Moreover, regardless of solvency, a court could void an
incurrence of indebtedness, including the Notes, if it determined that such
transaction was made with the intent to hinder, delay or defraud creditors. In
addition, a court could subordinate the indebtedness, including the Notes, to
the claims of all existing and future creditors on similar grounds.
 
     There can be no assurance as to what standard a court would apply in order
to determine whether the Company was "insolvent" upon consummation of the sale
of the Notes or that, regardless of the method of valuation, a court would not
determine that the Company was insolvent as a result of the foregoing.
 
     There can be no assurance that a court would conclude (i) that the Notes
are being incurred for proper purposes in good faith, or (ii) that the Company
(a) is solvent and will continue to be solvent after issuing the Notes, (b) will
have sufficient capital for carrying on the business it intends to conduct after
such issuance, and (c) will be able to pay its debts as they become due. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations of Aqua-Chem -- Liquidity and Capital Resources" and "Management's
Discussion and Analysis of Financial Condition and Results of Operations of
NDC."
 
PURCHASE OF NOTES UPON A CHANGE OF CONTROL
 
     Upon a Change of Control, the Company is required, subject to certain
conditions, to offer to purchase all outstanding Notes at 101% of the aggregate
principal amount thereof, plus accrued and unpaid interest, if any, to the date
of purchase. The source of funds for any such purchase would be the Company's
available cash or cash generated from other sources, including borrowings, sales
of assets, sales of equity or funds provided by a new controlling person. A
Change of Control likely would constitute an event of default under the New
Credit Facility that would permit the lenders to accelerate the debt under the
New Credit Facility because the New Credit Facility prohibits repurchase of the
Notes without the requisite senior lenders' prior written consent. In such
event, the Company likely would attempt to refinance the indebtedness
outstanding under the New Credit Facility and the Notes. In addition, the terms
governing the outstanding preferred stock require it to be redeemed upon a
change in ownership control. The aggregate amount attributable to redemption of
this stock would have been $12.3 million as of September 30, 1998. There can be
no assurance that sufficient funds will be available at the time of any Change
of Control to make any required purchases of Notes tendered, to repay
indebtedness under the New Credit Facility or to make the required redemptions
of the Company's preferred stock. See "Description of Certain Indebtedness" and
"Description of the Notes -- Change of Control."
 
     The Company could, in the future, enter into certain transactions,
including acquisitions, refinancings or other recapitalizations or highly
leveraged transactions, that would not constitute a Change of Control under the
Indenture but that could increase the amount of Indebtedness outstanding at such
time or otherwise affect the Company's capital structure or credit ratings or
otherwise adversely affect the Holders.
 
ABSENCE OF A PUBLIC MARKET FOR THE NOTES; VOLATILITY; RESTRICTIONS ON RESALE
 
     The Exchange Notes are being offered to the holders of Existing Notes. The
Existing Notes were originally issued on the Issue Date to the Initial
Purchasers pursuant to Section 4(2) of the Securities Act. The Company has been
advised that the Existing Notes subsequently have been resold to (i) qualified
institutional buyers as defined in Rule 144A ("Qualified Institutional Buyers"
or "QIBs") in reliance on, and subject to the restrictions imposed pursuant to,
Rule 144A, and (ii) certain non-U.S. persons outside the
 
                                       22
<PAGE>   27
 
United States of America in accordance with Regulation S. The Existing Notes
beneficially owned by Qualified Institutional Buyers are eligible for trading in
the Private Offering, Resale and Trading through Automated Linkages ("PORTAL")
Market, which is the National Association of Securities Dealers' screen-based
automated market for trading of securities eligible for resale under Rule 144A.
 
     To the extent that Existing Notes are tendered and accepted in the Exchange
Offer, the trading market for the remaining untendered or tendered but not
accepted Existing Notes could be adversely affected. The Exchange Notes will
constitute a new issue of securities, have no established trading market and may
not be widely distributed. Although the Initial Purchasers have informed the
Company that they currently intend to make a market in the Exchange Notes, they
are not obligated to do so and may discontinue market making at any time without
notice. The Company does not intend to list the Notes on any national securities
exchange or to seek the admission thereof to trading in The Nasdaq Stock Market.
Accordingly, there can be no assurance as to the development or liquidity of any
market for either Exchange Notes or the Existing Notes. If a market does
develop, the Notes may trade at a discount from their principal amount, and the
price of the Notes may fluctuate depending on many factors including, but not
limited to, prevailing interest rates, the Company's operating results and the
market for similar securities, and liquidity may therefore be limited. If a
market for the Notes does not develop, purchasers may be unable to resell such
securities for an extended period of time, if at all.
 
                                       23
<PAGE>   28
 
                               THE EXCHANGE OFFER
 
GENERAL
 
     The Existing Notes were originally sold by the Company on June 23, 1998 to
the Initial Purchasers pursuant to a purchase agreement dated June 18, 1998 (the
"Purchase Agreement"). The Initial Purchasers subsequently resold the Existing
Notes to QIBs in reliance on Rule 144A and to non-U.S. persons in accordance
with Regulation S.
 
     The Company hereby offers, upon the terms and conditions set forth herein
and in the related Letter of Transmittal, to exchange Exchange Notes for a like
principal amount of outstanding Existing Notes. An aggregate of $125 million
principal amount of Existing Notes are outstanding. The Exchange Offer is not
conditioned upon any minimum principal amount of Existing Notes being tendered.
 
REGISTRATION AGREEMENT
 
     As a condition to the Purchase Agreement, the Company agreed pursuant to
the Registration Rights Agreement with the Initial Purchasers dated as of June
18, 1998 (the "Registration Agreement"), for the benefit of the holders of the
Existing Notes, that the Company will, at its cost, (i) within 45 days after the
date of original issue of the Existing Notes, file a registration statement (the
"Exchange Offer Registration Statement") with the SEC with respect to a
registered offer to exchange the Existing Notes for the Exchange Notes that will
be issued under the Indenture in the same aggregate principal amount and having
terms substantially identical in all material respects to the Existing Notes
(except that the Exchange Notes will not contain terms with respect to transfer
restrictions) and (ii) use its best efforts to cause the Exchange Offer
Registration Statement to be declared effective under the Securities Act within
150 days after the date of original issue of the Existing Notes. Upon the
effectiveness of the Exchange Offer Registration Statement, the Company will
offer the Exchange Notes in exchange for surrender of the Existing Notes. The
Company will keep the Exchange Offer open for not less than 30 days (or longer
if required by applicable law) after the date notice of the Exchange Offer is
mailed to the holders of the Existing Notes. For each Existing Note surrendered
to the Company pursuant to the Exchange Offer, the holder of such Existing Note
will receive an Exchange Note having a principal amount equal to that of the
surrendered Existing Note. Interest on each Exchange Note will accrue from the
last interest payment date on which interest was paid on the Existing Note
surrendered in exchange thereof or, if no interest has been paid on such
Existing Note, from the date of its original issue.
 
     If the Company effects the Exchange Offer, it will be entitled to close the
Exchange Offer 30 days after the commencement thereof provided that it has
accepted all Existing Notes theretofore validly tendered in accordance with the
terms of the Exchange Offer.
 
     In the event that applicable interpretations of the staff of the SEC do not
permit the Company to effect a registered Exchange Offer, or if for any other
reason the Exchange Offer is not consummated within 180 days of the date of the
Registration Agreement, or if the Initial Purchasers so request with respect to
Existing Notes not eligible to be exchanged for Exchange Notes in the Exchange
Offer, or if any holder of Existing Notes is not eligible to participate in the
Exchange Offer or does not receive freely tradeable Exchange Notes in the
Exchange Offer, the Company will, at its cost, (a) as promptly as practicable,
file a shelf registration statement (a "Shelf Registration Statement") covering
resales of the Existing Notes or the Exchange Notes, as the case may be, (b) use
its best efforts to cause the Shelf Registration Statement to be declared
effective under the Securities Act and (c) keep the Shelf Registration Statement
effective until the time when the Existing Notes covered by the Shelf
Registration Statement can be sold pursuant to Rule 144 without any limitations
under clauses (c), (e), (f) and (h) of Rule 144. The Company will, in the event
a Shelf Registration Statement is filed, among other things, provide to each
holder for whom such Shelf Registration Statement was filed copies of the
prospectus which is a part of the Shelf Registration Statement, notify each such
holder when the Shelf Registration Statement has become effective and take
certain other actions as are required to permit unrestricted resales of the
Existing Notes or the Exchange Notes, as the case may be. A holder selling such
Existing Notes or Exchange Notes pursuant to the Shelf Registration Statement
generally would be required to be named as a selling security holder in the
related prospectus and to deliver a prospectus to purchasers, will be subject to
certain of the civil liability provisions under the Securities Act in connection
 
                                       24
<PAGE>   29
 
with such sales and will be bound by the provisions of the Registration
Agreement which are applicable to such holder (including certain indemnification
obligations).
 
     Pursuant to the Registration Agreement, if (i) by August 7, 1998, neither
the Exchange Offer Registration Statement nor the Shelf Registration Statement
has been filed with the SEC; (ii) by December 21, 1998, the Exchange Offer is
not consummated and, if applicable, the Shelf Registration Statement is not
declared effective; or (iii) after either the Exchange Offer Registration
Statement or the Shelf Registration Statement is declared effective, such
Registration Statement thereafter ceases to be effective or usable (subject to
certain exceptions) in connection with resales of Existing Notes or Exchange
Notes in accordance with and during the periods specified in the Registration
Agreement (each such event referred to in clauses (i) through (iii) a
"Registration Default"), additional interest will accrue on the applicable
Existing Notes and the Exchange Notes at the rate of 0.50% per annum from and
including the date on which any such Registration Default shall occur to but
excluding the date on which all Registration Defaults have been cured. Such
interest is payable in addition to any other interest payable from time to time
with respect to the Existing Notes and the Exchange Notes.
 
     Because the Exchange Offer Registration Statement was not declared
effective by November 21,1998, the Company will not be able to consummate the
Exchange Offer by December 21, 1998 and may be required to file the Shelf
Registration Statement. Further, as of December 21,1998, and until either the
Exchange Offer is consummated or the Shelf Registration Statement is declared
effective, as the case may be, the Company will be required to pay the
additional interest described above.
 
     The Company's purpose in making the Exchange Offer is to comply with the
Registration Agreement and to avoid the payment of additional interest which the
Company would incur if the Exchange Offer were not duly and timely consummated.
The full terms of the Company's obligations with respect to the Exchange Offer
are set forth in the Registration Agreement which has been filed as an exhibit
to the Registration Statement of which this Prospectus is a part. The summary
herein of certain provisions of the Registration Agreement does not purport to
be complete and is subject to, and is qualified in its entirety by reference to,
all the provisions of the Registration Agreement, a copy of which is available
from the Company upon request.
 
CERTAIN EFFECTS OF THE EXCHANGE OFFER
 
     Based on interpretations by the staff of the Commission, as set forth in
no-action letters issued to third parties, the Company believes that the
Exchange Offer will provide holders of Existing Notes with Exchange Notes that
will generally be freely transferable by holders thereof (other than any holder
who is an "affiliate" of the Company within the meaning of Rule 405 under the
Securities Act), who may offer for resale, resell or otherwise transfer such
Exchange Notes without complying with the registration and prospectus delivery
provisions of the Securities Act, provided that such Exchange Notes are acquired
in the ordinary course of each such holder's business and such holders are not
engaged in, and do not intend to engage in, a distribution of such Exchange
Notes and have no arrangement or understanding with any person to participate in
a distribution of such Exchange Notes, provided, further that broker-dealers
("Participating Broker-Dealers") receiving Exchange Notes in the Exchange Offer
will have a prospectus delivery requirement with respect to resales of such
Exchange Notes. The SEC has taken the position that Participating Broker-Dealers
may fulfill their prospectus delivery requirements with respect to Exchange
Notes (other than a resale of an unsold allotment from the original sale of the
Existing Notes) with the prospectus contained in the Exchange Offer Registration
Statement. Each broker-dealer that receives Exchange Notes for its own account
in exchange for Existing Notes, where such Existing Notes were acquired by such
broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Notes. See "Plan of Distribution." Under the
Registration Agreement, the Company is required to allow Participating
Broker-Dealers and other persons, if any, with similar prospectus delivery
requirements to use the prospectus contained in the Exchange Offer Registration
Statement in connection with the resale of such Exchange Notes. The Company has
not sought, and does not intend to seek, a no-action letter from the Commission
with respect to the effects of the Exchange Offer.
 
     The Existing Notes that are not exchanged for Exchange Notes pursuant to
the Exchange Offer will remain restricted securities under the Securities Act.
Accordingly, such Existing Notes may be resold only
 
                                       25
<PAGE>   30
 
(i) to the Company, (ii) pursuant to a registration statement that has been
declared effective under the Securities Act, (iii) for so long as the Existing
Notes are eligible for resale pursuant to Rule 144A, to a person reasonably
believed to be a QIB that purchases for its own account or for the account of a
QIB to whom notice is given that the transfer is being made in reliance on Rule
144A, (iv) pursuant to offers and sales to non-U.S. persons that occur outside
the United States within the meaning of Regulation S, (v) to an institutional
"accredited investor" (as defined in Rule 501(a)(1), (2), (3) or (7) of
Regulation D under the Securities Act and referred to in this Prospectus as an
"Institutional Accredited Investor") that is acquiring the security for its own
account or for the account of such an Institutional Accredited Investor for
investment purposes and not with a view to, or for offer or sale in connection
with, any distribution in violation of the Securities Act or (vi) pursuant to
any other available exemption from the registration requirements of the
Securities Act, subject in each of the foregoing cases (a) to any requirement of
law that the disposition of its property or the property of such investor
account or accounts be at all times within its or their control and (b) to
compliance with any applicable state or other securities laws. After the
Exchange Offer is completed, holders of Existing Notes will not have certain
registration rights under the Registration Agreement. See "-- Termination of
Certain Rights."
 
     Because the Exchange Offer is for any and all Existing Notes, the number of
Existing Notes tendered and exchanged in the Exchange Offer will reduce the
principal amount of Existing Notes outstanding. As a result, the liquidity of
any remaining Existing Notes may be substantially reduced. The Existing Notes
beneficially owned by QIBs are currently eligible for sale pursuant to Rule 144A
through PORTAL. Because the Company anticipates that most holders of Existing
Notes will elect to exchange such Existing Notes for Exchange Notes due to the
absence of restrictions on the resale of Exchange Notes under the Securities
Act, the Company anticipates that the liquidity of the market for any Existing
Notes remaining after the consummation of the Exchange Offer may be
substantially limited.
 
     The exchange of an Existing Note for an Exchange Note should not constitute
a taxable exchange of the Existing Note if the interest rate on the Exchange
Note is equal to the interest rate on the Existing Note. Although there is no
definitive guidance on the issue, even if the interest rate on the Exchange Note
is not equal to the interest rate on the Existing Note because Additional
Interest is payable on the Existing Note but not on the Exchange Note, the
exchange should not constitute a taxable exchange of the Existing Note. See
"Certain United States Federal Income Tax Considerations."
 
EXPIRATION AND EXTENSION
 
     The Exchange Offer will expire at 5:00 p.m., New York City time, on
February 5, 1999, unless extended by the Company. The Exchange Offer may be
extended by oral or written notice from the Company to the Exchange Agent at any
time or from time to time, on or prior to the date then fixed for the expiration
of the Exchange Offer. The term "Expiration Date" means 5:00 p.m., New York City
time, on February 5, 1999, unless the Company, in its sole discretion, notifies
the Exchange Agent that the period of the Exchange Offer has been extended, in
which case the term "Expiration Date" means the latest time and date on which
the Exchange Offer, as so extended, will expire. Notwithstanding any extension
of the Exchange Offer, if the Exchange Offer is not consummated by December 21,
1998, additional interest will accrue. Public announcement of any extension of
the Exchange Offer will be timely made by the Company, but, unless otherwise
required by law or regulation, the Company will not have any obligation to
communicate such public announcement other than by making a release to the Dow
Jones News Service.
 
ACCRUED INTEREST
 
     Holders of Existing Notes that are accepted for exchange will not receive
any accrued interest thereon. However, each Exchange Note will bear interest
from the most recent date on which interest has been paid on the corresponding
Existing Note, or, if no interest has been paid, from June 23, 1998.
 
CONDITIONS
 
     Notwithstanding any other provisions of the Exchange Offer, or any
extension of the Exchange Offer, the Company will not be required to cause the
issuance of Exchange Notes in respect of any validly tendered Existing Notes not
accepted and, prior to the acceptance of tendered Existing Notes, may terminate
the
 
                                       26
<PAGE>   31
 
Exchange Offer (by oral or written notice to the Exchange Agent and by timely
public announcement communicated, unless otherwise required by applicable law or
regulation, by making a release to the Dow Jones News Service) or, subject to
compliance with the applicable rules of the Commission, delay the acceptance of
the tendered Existing Notes, if any material change occurs which is likely to
affect the Exchange Offer, including, but not limited to, the following:
 
          (i) there shall occur (a) any general suspension of or general
     limitation on prices for, or trading in, securities on any national
     securities exchange or in the over-the-counter market, (b) any limitation
     by any governmental agency or authority which may adversely affect the
     ability of the Company to complete the transactions contemplated by the
     Exchange Offer, (c) a declaration of a banking moratorium or any suspension
     of payments in respect of banks in the United States or any limitation by
     any governmental agency or authority which adversely affects the extension
     of credit or (d) a commencement of a war, armed hostilities or other
     similar international calamity directly or indirectly involving the United
     States, or, in the case of any of the foregoing existing at the time of the
     commencement of the Exchange Offer, a material acceleration or worsening
     thereof;
 
          (ii) any statute, rule or regulation shall have been proposed or
     enacted, or any action shall have been taken or proposed to be taken by any
     governmental authority which, in the sole judgment of the Company, would or
     might prohibit, restrict or delay completion of the Exchange Offer;
 
          (iii) there shall be instituted or threatened any action or proceeding
     before any court or governmental agency challenging the Exchange Offer or
     otherwise directly or indirectly relating to the Exchange Offer;
 
          (iv) there shall occur any development in any pending action or
     proceeding which, in the sole judgment of the Company, would or might
     prohibit, restrict or delay consummation of the Exchange Offer;
 
          (v) there exists, in the sole judgment of the Company, any actual or
     threatened legal impediment (including a default or prospective default
     under an agreement, indenture or other instrument or obligation to which
     the Company is a party or by which it is bound) to the completion of the
     Exchange Offer; or
 
          (vi) prior to the completion of the Exchange Offer, the Company
     determines there has been a change in law or applicable interpretation
     thereof by the staff of the Commission such that the Exchange Notes that
     would be received by holders in the Exchange Offer in exchange for Existing
     Notes would not be transferable, upon receipt, by each such holder (other
     than a holder that is an affiliate of the Company, a holder who acquires
     the Exchange Notes outside the ordinary course of such holder's business, a
     holder who is engaged in or intends to engage in a distribution of such
     Exchange Notes or a holder who has arrangements or understandings with any
     person to participate in the Exchange Offer for the purpose of distributing
     the Exchange Notes) without restriction under the Securities Act.
 
     Subject to the obligations under the Registration Agreement to use its best
efforts to complete the Exchange Offer, the Company expressly reserves the
right, at any time prior to the acceptance of tendered Existing Notes, to
terminate the Exchange Offer and not accept for exchange any Existing Notes upon
the occurrence of any of the foregoing conditions. In addition, the Company may
amend the Exchange Offer at any time prior to the acceptance of tendered
Existing Notes if any of the conditions set forth above occur. Moreover,
regardless of whether any of the foregoing conditions has occurred, the Company
reserves the right, in its reasonable discretion, to amend the Exchange Offer in
any manner prior to the acceptance of tendered Existing Notes, although it has
no current intention to do so.
 
     The Company reserves the right to waive any condition or otherwise amend
the Exchange Offer prior to the acceptance of tendered Existing Notes. If any
amendment by the Company of the Exchange Offer or waiver by the Company of any
condition thereto constitutes a material change in the information previously
disclosed to the holders of Existing Notes, the Company will, in accordance with
the applicable rules of the Commission, promptly disseminate disclosure of such
change in a manner reasonably calculated to inform such holders of such change.
If it is necessary to permit an adequate dissemination of information regarding
 
                                       27
<PAGE>   32
 
such material change, the Company will extend the Exchange Offer to permit an
adequate time for holders of Existing Notes to consider the additional
information.
 
     The foregoing conditions are for the sole benefit of the Company and may be
asserted by the Company regardless of the circumstances giving rise to any such
condition or may be waived by the Company, in whole or in part, at any time and
from time to time in its sole discretion. Any determination made by the Company
concerning an event, development or circumstance described or referred to above
will be final and binding on all parties to the Exchange Offer.
 
     In addition, the Company will not accept for exchange any Existing Notes
tendered, and no Exchange Notes will be issued in exchange for any such Existing
Notes, if at such time any stop order shall be threatened or in effect with
respect to the Registration Statement of which this Prospectus constitutes a
part or the qualification of the Indenture under the Trust Indenture Act of
1939, as amended.
 
     If the event referred to in clause (vi), above, shall occur, the Company
shall be under no continuing obligation under the Registration Agreement to
complete the Exchange Offer, but in lieu thereof will be obligated to file and
use its best efforts to secure and maintain the effectiveness under the
Securities Act of a "shelf" registration statement providing for the resale of
Existing Notes.
 
HOW TO TENDER
 
     A holder of Existing Notes may tender Existing Notes by (i) properly
completing and signing the Letter of Transmittal or a facsimile thereof (all
references in this Prospectus to the Letter of Transmittal shall be deemed to
include a facsimile thereof), having their signatures guaranteed if required,
and delivering the same, together with the Existing Notes being tendered (or a
confirmation of an appropriate book-entry transfer), to the Exchange Agent on or
prior to the Expiration Date, or (ii) requesting a broker, dealer, bank, trust
company or other nominee to effect the transaction for such holder prior to the
Expiration Date.
 
     Exchange Notes will not be issued in the name of a person other than that
of a registered holder of the Existing Notes appearing on the Note register.
 
     The Exchange Agent will establish an account with respect to the Existing
Notes at The Depository Trust Company ("DTC" or the "Depository") for purposes
of the Exchange Offer promptly after the date of this Prospectus, and any
financial institution which is a participant in DTC may make book-entry delivery
of the Existing Notes by causing DTC to transfer such Existing Notes into the
Exchange Agent's account in accordance with DTC's procedure for such transfer.
Although delivery of Existing Notes may be effected through book-entry transfer
into the Exchange Agent's account at DTC, the Letter of Transmittal, with any
required signature guarantees and any other required documents, must in any case
be transmitted to and received by the Exchange Agent on or prior to the
Expiration Date at the address set forth below under "-- Exchange Agent," or the
guaranteed delivery procedure described below must be complied with. Delivery of
documents to DTC does not constitute delivery to the Exchange Agent. See
"-- Exchanging Book-Entry Notes."
 
     THE METHOD OF DELIVERY OF EXISTING NOTES AND ALL OTHER DOCUMENTS, INCLUDING
DELIVERY THROUGH DTC, IS AT THE ELECTION AND RISK OF THE HOLDER. IF SENT BY
MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL, RETURN RECEIPT REQUESTED, BE USED,
AND PROPER INSURANCE BE OBTAINED.
 
     If a holder desires to tender Existing Notes pursuant to the Exchange Offer
and such holder's Existing Notes are not immediately available or time will not
permit all of the above documents to reach the Exchange Agent prior to the
Expiration Date, or such holder cannot complete the procedure of book-entry
transfer on a timely basis, such tender may be effected if the following
conditions are satisfied:
 
          (i) such tenders are made by or through an eligible guarantor
     institution which is a member of one of the following Signature Guarantee
     Programs: The Securities Transfer Agents Medallion Program (STAMP); The New
     York Stock Exchange's Medallion Signature Program (MSP) and The Stock
     Exchanges Medallion Program (SEMP) (each, an "Eligible Institution");
 
                                       28
<PAGE>   33
 
          (ii) a properly completed and duly executed notice of guaranteed
     delivery ("Notice of Guaranteed Delivery"), in substantially the form
     provided by the Company, is received by the Exchange Agent as provided
     below on or prior to the Expiration Date; and
 
          (iii) the Existing Notes, in proper form for transfer (or confirmation
     of book-entry transfer of such Existing Notes into the Exchange Agent's
     account at the Depository as described above), together with a properly
     completed and duly executed Letter of Transmittal and all other documents
     required by the Letter of Transmittal, are received by the Exchange Agent
     within five New York Stock Exchange, Inc. trading days after the date of
     execution of such Notice of Guaranteed Delivery.
 
     The Notice of Guaranteed Delivery may be delivered by hand or transmitted
by facsimile transmission or mail to the Exchange Agent and must include a
guarantee by an Eligible Institution in the form set forth in such Notice of
Guaranteed Delivery.
 
     A tender will be deemed to have been received as of the date when the
tendering holder's duly signed Letter of Transmittal accompanied by Existing
Notes (or a timely confirmation received of a book-entry transfer of Existing
Notes into the Exchange Agent's account at DTC) or a Notice of Guaranteed
Delivery from an Eligible Institution is received by the Exchange Agent.
Issuances of Exchange Notes in exchange for Existing Notes tendered pursuant to
a Notice of Guaranteed Delivery by an Eligible Institution will be made only
against delivery of the Letter of Transmittal (and any other required documents)
and the tendered Existing Notes (or a timely confirmation received of a
book-entry transfer of Existing Notes into the Exchange Agent's account at DTC)
to the Exchange Agent or confirmation of the Book-Entry Transfer Facility
Automated Tender Offer Program ("ATOP") procedures set forth below. See
"-- Exchanging Book-Entry Notes."
 
     Partial tenders of Existing Notes may be made only if (i) the principal
amount tendered is equal to $1,000 or an integral multiple thereof and (ii) the
remaining untendered portion of such Existing Notes is in a principal amount of
$250,000, or any integral multiple of $1,000 in excess of such amount. Holders
tendering less than the entire principal amount of any Existing Note they hold
in accordance with the foregoing restrictions must appropriately indicate such
fact on the Letter of Transmittal accompanying the tendered Existing Note.
 
     With respect to tenders of Existing Notes, the Company reserves full
discretion to determine whether the documentation is complete and generally to
determine all questions as to tenders, including the date of receipt of a
tender, the propriety of execution of any document, and any other questions as
to the validity, form, eligibility or acceptability of any tender. The Company
reserves the right to reject any tender not in proper form or otherwise not
valid or the acceptance of exchange of which, in the opinion of the Company's
counsel, may be unlawful or to waive any irregularities or conditions, and the
Company's interpretation of the terms and conditions of the Exchange Offer
(including the instructions on the Letter of Transmittal) will be final. The
Company shall not be obligated to give notice of any defects or irregularities
in tenders and shall not incur any liability for failure to give any such
notice. The Exchange Agent may, but shall not be obligated to, give notice of
any irregularities or defects in tenders, and shall not incur any liability for
any failure to give any such notice. Existing Notes shall not be deemed to have
been duly or validly tendered unless and until all defects and irregularities
have been cured or waived. All improperly tendered Existing Notes, as well as
Existing Notes in excess of the principal amount tendered for exchange, will be
returned (unless irregularities and defects are timely cured or waived), without
cost to the tendering holder (or, in the case of Existing Notes delivered by
book-entry transfer within DTC, will be credited to the account maintained
within DTC by the participant in DTC which delivered such shares), promptly
after the Expiration Date.
 
     If the Letter of Transmittal is signed by a person or persons other than
the registered holder or holders of Existing Notes, such Existing Notes must be
endorsed or accompanied by appropriate powers of attorney, in either case signed
exactly as the name or names of the registered holder or holders appear on the
Existing Notes.
 
     If the Letter of Transmittal or any Existing Notes or powers of attorney
are signed by trustees, executors, administrators, guardians, attorneys-in-fact,
officers of corporations or others acting in a fiduciary or
 
                                       29
<PAGE>   34
 
representative capacity, such persons should so indicate when signing, and,
unless waived by the Company, proper evidence satisfactory to the Company of
their authority to so act must be submitted.
 
EXCHANGING BOOK-ENTRY NOTES
 
     The Exchange Agent and DTC have confirmed that any financial institution
that is a participant in the DTC may utilize ATOP to tender Existing Notes.
 
     Any DTC participant may make book-entry delivery of Existing Notes by
causing DTC to transfer such Existing Notes into the Exchange Agent's account in
accordance with DTC's ATOP procedures for transfer. However, the exchange for
the Existing Notes so tendered will only be made after timely confirmation (a
"Book-Entry Confirmation") of such book-entry transfer of Existing Notes into
the Exchange Agent's account, and timely receipt by the Exchange Agent of an
Agent's Message (as defined) and any other documents required by the Letter of
Transmittal. The term "Agent's Message" means a message, transmitted by the DTC
and received by the Exchange Agent and forming part of a Book-Entry
Confirmation, which states that DTC has received an express acknowledgment from
a participant tendering Existing Notes that are the subject of such Book-Entry
Confirmation that such participant has received and agrees to be bound by the
terms of the Letter of Transmittal, and that the Company may enforce such
agreement against such participant.
 
TERMS AND CONDITIONS OF THE LETTER OF TRANSMITTAL
 
     The Letter of Transmittal contains, among other things, certain terms and
conditions which are summarized below and are part of the Exchange Offer.
 
     By tendering Existing Notes and executing the Letter of Transmittal, the
holder thereof shall represent and agree that (i) it is neither an affiliate of
the Company nor a broker-dealer tendering Existing Notes acquired directly from
the Company for its own account, (ii) it acquired the Exchange Notes in the
ordinary course of its business and (iii) it is not engaged in, and does not
intend to engage in, a distribution of the Exchange Notes and it has no
arrangement or understanding to participate in a distribution of Exchange Notes.
Holders of Existing Notes who participate in the Exchange Offer should be aware
that, except in the case of certain broker-dealers as described below, if they
accept the Exchange Offer for the purpose of participating in a distribution of
the Exchange Notes, they cannot rely on such interpretations by the staff of the
Commission and must comply with the registration and prospectus delivery
requirements of the Securities Act. A holder of Existing Notes (other than
certain specified holders) who wishes to exchange such Existing Notes for
Exchange Notes in the Exchange Offer will be required to represent that any
Exchange Notes to be received by it will be acquired in the ordinary course of
its business and that at the time of the commencement of the Exchange Offer it
has no arrangement or understanding with any person to participate in the
distribution (within the meaning of the Securities Act) of the Exchange Notes
and that it is not an "affiliate" of the Company, as defined in Rule 405 of the
Securities Act, or if it is an affiliate, that it will comply with the
registration and prospectus delivery requirements of the Securities Act to the
extent applicable.
 
     Each broker-dealer that receives Exchange Notes for its own account in
exchange for Existing Notes, where such Existing Notes were acquired by such
broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus with any resale
of such Exchange Notes. See "Plan of Distribution." The Letter of Transmittal
states that by so acknowledging and by delivering a prospectus, a broker-dealer
will not be deemed to admit that it is an "underwriter" within the meaning of
the Securities Act.
 
     Existing Notes tendered in exchange for Exchange Notes (or a timely
confirmation of a book-entry transfer of such Existing Notes into the Exchange
Agent's account at DTC) must be received by the Exchange Agent, with the Letter
of Transmittal and any other required documents, by 5:00 p.m., New York City
time, on or prior to February 5, 1999, unless extended, or within the time
periods set forth above in "-- How to Tender" pursuant to a Notice of Guaranteed
Delivery from an Eligible Institution. The party tendering the Existing Notes
for exchange (the "Tendering Holder") shall be deemed to have sold, assigned and
transferred the Existing Notes to the Exchange Agent, as agent of the Company,
and irrevocably constituted and appointed the Exchange Agent as the Tendering
Holder's agent and attorney-in-fact to cause
 
                                       30
<PAGE>   35
 
the Existing Notes to be transferred and exchanged. The Tendering Holder shall
also warrant that it has full power and authority to tender, exchange, sell,
assign, and transfer the Existing Notes and to acquire the Exchange Notes
issuable upon the exchange of such tendered Existing Notes, that the Exchange
Agent, as agent of the Company, will acquire good and unencumbered title to the
tendered Existing Notes, free and clear of all liens, restrictions, charges and
encumbrances, and that the Existing Notes tendered for exchange are not subject
to any adverse claims when accepted by the Exchange Agent, as agent of the
Company. The Tendering Holder shall also warrant that it will, upon request,
execute and deliver any additional documents deemed by the Company or the
Exchange Agent to be necessary or desirable to complete the exchange, sale,
assignment and transfer of the Existing Notes. All authority conferred or agreed
to be conferred in the Letter of Transmittal by the Tendering Holder will
survive the death or incapacity of the Tendering Holder and any obligation of
the Tendering Holder shall be binding upon the heirs, executors, administrators,
personal representatives, trustees in bankruptcy, legal representatives,
successors and assigns of such Tendering Holder.
 
     Signature(s) on the Letter of Transmittal will be required to be guaranteed
as set forth above in "-- How to Tender." All questions as to the validity,
form, eligibility (including time of receipt) and acceptability of any tender
will be determined by the Company, in its sole discretion, and such
determination will be final and binding. Unless waived by the Company,
irregularities and defects must be cured by the Expiration Date.
 
WITHDRAWAL RIGHTS
 
     All tenders of Existing Notes may be withdrawn at any time prior to the
Expiration Date. To be effective, a notice of withdrawal must be timely received
by the Exchange Agent at the address set forth below under "-- Exchange Agent."
Any notice of withdrawal must specify the person named in the Letter of
Transmittal as having tendered the Existing Notes to be withdrawn. If the
Existing Notes have been physically delivered to the Exchange Agent, the
Tendering Holder must also submit the serial number shown on the particular
Existing Notes to be withdrawn. If the Existing Notes have been delivered
pursuant to the book-entry procedures set forth above under "-- How to Tender,"
any notice of withdrawal must specify the name and number of the participant's
account at the Depository to be credited with the withdrawn Existing Notes. The
Exchange Agent will return the properly withdrawn Existing Notes as soon as
practicable following receipt of the notice of withdrawal. All questions as to
the validity, including time of receipt, of notices and withdrawals will be
determined by the Company, and such determination will be final and binding on
all parties.
 
ACCEPTANCE OF TENDERS
 
     Subject to the terms and conditions of the Exchange Offer, including the
reservation of certain rights by the Company, Existing Notes tendered (either
physically or through book-entry delivery as described in "-- How to Tender")
with a properly executed Letter of Transmittal and all other required
documentation, and not withdrawn, will be accepted on or promptly after the
Expiration Date. At the option of the holder of an Exchange Note, such Exchange
Note may be held in the form of either (i) a certificated Exchange Note or (ii)
a beneficial interest in one or more of the Global Notes (as defined).
Beneficial interests in the Global Notes will be shown on, and transfers thereof
will be effected only through, records maintained by the Depository and its
participants. Subject to the terms and conditions of the Exchange Offer,
certificated Exchange Notes to be issued in exchange for properly tendered
Existing Notes will be mailed by the Exchange Agent promptly after the
acceptance of such tendered Existing Notes and the Exchange Notes to be issued
in the form of Global Notes will be deposited with the Depository promptly after
acceptance of the related tendered Existing Notes. Acceptance of tendered
Existing Notes will be effected by the delivery of a notice to that effect by
the Company to the Exchange Agent. Subject to the applicable rules of the
Commission, the Company, however, reserves the right, prior to the acceptance of
tendered Existing Notes, to delay acceptance of tendered Existing Notes upon the
occurrence of any of the conditions set forth above under the caption
"-- Conditions." The Company confirms that its reservation of the right to delay
acceptance of tendered Existing Notes is subject to the provisions of Rule
14e-1(c) under the Securities Exchange Act of 1934, as amended, which requires
that a tender offeror pay the consideration offered or return the tendered
securities promptly after the termination or withdrawal of a tender offer.
 
     Although the Company does not currently intend to do so, if it modifies the
terms of the Exchange Offer, such modified terms will be available to all
holders of Existing Notes, whether or not their Existing Notes have
 
                                       31
<PAGE>   36
 
been tendered prior to such modification. Any material modification will be
disclosed in accordance with the applicable rules of the Commission and, if
required, the Exchange Offer will be extended to permit holders of Existing
Notes adequate time to consider such modification.
 
     The tender of Existing Notes pursuant to any one of the procedures set
forth in "-- How to Tender" will constitute an agreement between the Tendering
Holder and the Company upon the terms and subject to the conditions of the
Exchange Offer.
 
EXCHANGE AGENT
 
     United States Trust Company of New York has agreed to provide certain
services as Exchange Agent for the Exchange Offer. Tendering Holders who require
assistance should contact the Exchange Agent. Letters of Transmittal and any
inquiries with respect to the Exchange Offer must be addressed to the Exchange
Agent as follows:
 
<TABLE>
<S>                            <C>                            <C>
          By Mail:                Facsimile Transmission        By Hand up to 4:30 p.m.:
                                          Number:
     United States Trust              (212) 780-0592           United States Trust Company
     Company of New York        (For Eligible Institutions             of New York
        P.O. Box 844                       Only)                      111 Broadway
       Cooper Station                                                  Lower Level
     New York, New York            Confirm by Telephone:        New York, New York 10006
         10276-0844                   (800) 548-6565              Attn: Corporate Trust
    Attn: Corporate Trust                                               Services
           Services
(Registered or Certified Mail
         Recommended)
 
                                                                  By Overnight Courier:
                                                               United States Trust Company
                                                                       of New York
                                                               770 Broadway -- 13th Floor
                                                                New York, New York 10003
                                                                  Attn: Corporate Trust
                                                                        Services
</TABLE>
 
     DELIVERY TO OTHER THAN THE ADDRESS SET FORTH ABOVE OR FACSIMILE
TRANSMISSION TO OTHER THAN THE FACSIMILE TRANSMISSION NUMBER SET FORTH ABOVE
WILL NOT CONSTITUTE VALID DELIVERY.
 
SOLICITATION OF TENDERS; EXPENSES
 
     Except as described above under "-- Exchange Agent," the Company has not
retained any agent in connection with the Exchange Offer and will not make any
payments to brokers, dealers or other persons for soliciting or recommending
acceptances of the Exchange Offer. The Company, will, however, reimburse the
Exchange Agent for its reasonable out-of-pocket expenses in connection
therewith. The Company will also pay brokerage houses and other custodians,
nominees and fiduciaries the reasonable out-of-pocket expenses incurred by them
in forwarding copies of this Prospectus and related documents to the beneficial
owners of the Existing Notes and in handling or forwarding tenders for their
customers.
 
TRANSFER TAXES
 
     The Company will pay all transfer taxes, if any, applicable to the transfer
of Existing Notes to it or its order pursuant to the Exchange Offer. If,
however, Exchange Notes and/or substitute Existing Notes not exchanged are to be
delivered to, or are to be registered or issued in the name of, any person other
than the registered holder of the Existing Notes tendered, or if tendered
Existing Notes are registered in the name of any person other than the person
signing the Letter of Transmittal, or if a transfer tax is imposed for any
reason other than the transfer of Existing Notes to the Company or its order
pursuant to the Exchange Offer, the amount of any such transfer taxes (whether
imposed on the registered holder or any other person) will be payable by the
Tendering Holder. If satisfactory evidence of payment of such taxes or exemption
therefrom is not submitted with the Letter of Transmittal, the amount of such
transfer taxes will be billed directly to such Tendering Holder.
 
                                       32
<PAGE>   37
 
ACCOUNTING TREATMENT
 
     The carrying value of the Existing Notes is expected to become the carrying
value of the Exchange Notes at the time of the Exchange Offer. Accordingly, no
gain or loss for accounting purposes will be recognized. The expenses of the
Exchange Offer will be amortized over the term of the Exchange Notes.
 
TERMINATION OF CERTAIN RIGHTS
 
     Holders of the Exchange Notes will not be entitled to certain special
rights under the Registration Agreement, which rights will terminate when the
Exchange Offer is completed. Pursuant to the Registration Agreement, the
Exchange Offer shall be deemed to be "completed" upon the occurrence of (i) the
filing and effectiveness under the Securities Act of a registration statement
relating to the Exchange Notes to be issued in the Exchange Offer, (ii) the
maintenance of such registration statement continuously effective for a period
of not less than 30 days after notice has been sent to holders of Existing Notes
and (iii) the delivery by the Company in exchange for all Existing Notes that
have been duly tendered and not validly withdrawn on or prior to the Expiration
Date of Exchange Notes transferable by each holder thereof (other than a holder
that is an affiliate of the Company within the meaning of Rule 405 under the
Securities Act, a broker-dealer tendering Existing Notes acquired directly from
the Company for its own account, a holder who acquires the Exchange Notes
outside the ordinary course of such holder's business or a holder who is engaged
in or who intends to engage in a distribution of the Exchange Notes or who has
arrangements or understandings with any person to participate in the Exchange
Offer for the purpose of distributing the Exchange Notes) without restrictions
under the Securities Act. The rights that will terminate include the right to
require the Company (i) to file with the Commission, and use its best efforts to
cause to become effective under the Securities Act, a registration statement
with respect to the Exchange Notes and (ii) other than in certain limited
circumstances, to file with the Commission, use its best efforts to cause to
become effective under the Securities Act and keep continuously effective for a
period of up to three years a "shelf" registration statement providing for the
registration of, and the sale on a continuous or delayed basis by the holders
of, Existing Notes.
 
USE OF PROCEEDS
 
     The Exchange Offer is intended to satisfy certain of the Company's
obligations under the Registration Agreement. The Company will not receive any
cash proceeds from the issuance of the Exchange Notes offered hereby. In
consideration for issuing the Exchange Notes as contemplated in this Prospectus,
the Company will receive in exchange Existing Notes in like principal amount,
the form and terms of which are identical in all material respects to the form
and terms of the Exchange Notes, except as otherwise described herein. The
Existing Notes surrendered in exchange for the Exchange Notes will be retired
and canceled and cannot be reissued. Accordingly, issuance of the Exchange Notes
will not result in any increase in the indebtedness of the Company.
 
     The proceeds to the Company for the sale of the Existing Notes were
approximately $121.3 million, net of Initial Purchasers' discount. The net
proceeds to the Company from the sale of the Existing Notes were used as
follows: (i) approximately $47.9 million was used to pay the purchase price of
the Acquisition and related expenses; (ii) approximately $63.9 million was used
to repay the Company's existing revolving credit facility and term loan
facility, existing subordinated debt, and an existing note payable
(collectively, the "Outstanding Indebtedness"); (iii) approximately $3.3 million
was used to retire a portion of the Company's Series A Preferred Stock; (iv)
approximately $1.3 million was used to pay fees and expenses of the Private
Offering; and (v) approximately $4.9 million was used for general corporate
purposes.
 
                                       33
<PAGE>   38
 
                                 CAPITALIZATION
 
     The following table sets forth, as of September 30, 1998, the consolidated
capitalization of the Company. The information set forth below should be read in
conjunction with the consolidated financial statements of Aqua-Chem included
elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                                  SEPTEMBER 30, 1998
                                                                  ------------------
                                                                (DOLLARS IN THOUSANDS)
<S>                                                             <C>
Cash and cash equivalents...................................           $  6,114
                                                                       ========
Long-term debt:
  New Credit Facility(a)....................................           $     --
  The Notes.................................................            125,000
                                                                       --------
     Total debt.............................................            125,000
Preferred stock.............................................              4,795
Stockholders' deficit.......................................             (2,914)
                                                                       --------
       Total capitalization.................................           $126,881
                                                                       ========
</TABLE>
 
- ------------------------------------
(a) Consists of a $45,000 revolving facility, none of which was drawn at
    September 30, 1998. See "Description of Certain Indebtedness."
 
                                       34
<PAGE>   39
 
                       UNAUDITED PRO FORMA FINANCIAL DATA
 
     The unaudited pro forma financial data include the unaudited pro forma
consolidated statements of operations of the Company for the twelve months ended
December 31, 1997, and the nine months ended September 30, 1998 (the "Pro Forma
Statements of Operations"). The Pro Forma Statements of Operations for the
twelve months ended December 31, 1997 have been prepared using NDC's results for
the fiscal year ended October 31, 1997. The Pro Forma Statements of Operations
for the nine months ended September 30, 1998 have been prepared using NDC's
historical results for the period from January 1, 1998 through June 23, 1998,
the date the Acquisition was consummated. The results of NDC's operations for
the year ended October 31, 1997 are not necessarily indicative of the results of
NDC's operations for the twelve months ended December 31, 1997. NDC's net sales
and net income for the combined months of November and December 1997 were
$12,916 and $1,901, respectively. NDC management has advised the Company that
there were no material or unusual events outside of the normal course of
business which occurred during this two month period. The pro-forma and actual
results of operations for any interim period are not necessarily indicative of
the results for an entire year. The Pro Forma Statements of Operations give
effect to the Transactions as if they had occurred on January 1, 1997.
 
     The Company is implementing a business plan designed to achieve certain
synergies and costs savings arising from (i) the Company's closure of its
Greenville, Mississippi facility; and (ii) the in-sourcing of certain boiler
components currently procured from third parties that either Cleaver-Brooks or
National Dynamics already produces. See Note (b) to the table under
"Summary -- Summary Unaudited Pro Forma Financial Data." The Pro Forma
Statements of Operations do not include these cost savings or the cost of
achieving these cost savings.
 
     The Acquisition will be accounted for by the purchase method of accounting.
Under purchase accounting, the total purchase price will be allocated to the
tangible and intangible assets and liabilities acquired based upon their
respective fair values as of the closing of the Acquisition based on valuations
and studies which are not yet available. A preliminary allocation of the
purchase price has been made to major categories of assets and liabilities in
the Pro Forma Financial Statements based on available information. The final
allocation of purchase price and resulting effect on income from operations may
differ from the pro forma amounts included herein. Management does not expect
that differences between the preliminary and final purchase price allocation
will have a material impact on the Company's financial position or results of
operations. Pursuant to the Asset Purchase Agreement, the purchase price was
subject to certain post-closing adjustments based upon a closing date balance
sheet and NDC's physical inventory as of that date. These post-closing
adjustments have been made and are reflected in the Unaudited Pro Forma
Financial Data. Following an audit of the closing date balance sheet, Aqua-Chem
disputed the exclusion of certain units from the closing date physical
inventory, taking the position that these units were improperly characterized as
completed sales, resulting in an overstatement of NDC's net sales by $5.3
million and an overstatement of its gross margin by $1.4 million for the period
ended June 23, 1998. The parties subsequently resolved this dispute. See
"Summary -- Recent Developments -- Purchase Price Dispute."
 
     The disputed sales, and the related cost of goods sold have been eliminated
from NDC's historical results through June 23, 1998 included in the Pro Forma
Statements of Operations for the Nine Months Ended September 30, 1998. Of these
sales, $4.1 million was recognized as completed sales by the Company during the
quarter ended September 30, 1998 because the units had actually been shipped to
customers as of that date; the remaining $1.2 million of units have either been
shipped as of the date of this Prospectus or are expected to be shipped prior to
December 31, 1998.
 
     The Pro Forma Financial Statements are based on certain estimates and
assumptions made by the management of the Company as to the combined operations
of Aqua-Chem and NDC which the Company believes to be reasonable. The Pro Forma
Financial Statements do not purport to be indicative of the results of
operations or financial position of Aqua-Chem and NDC that actually would have
been obtained had the Transactions been completed as of the assumed dates, or to
project the results of operations or financial position of the Company for any
future date or period.
 
                                       35
<PAGE>   40
 
     The Pro Forma Financial Statements should be read in conjunction with the
financial statements of Aqua-Chem and of NDC included elsewhere in this
Prospectus. See also "Risk Factors -- Realization of Benefits of the
Acquisition," "Management's Discussion and Analysis of Financial Condition and
Results of Operations of Aqua-Chem," and "Management's Discussion and Analysis
of Financial Condition and Results of Operations of NDC."
 
                                       36
<PAGE>   41
 
           UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS
                 FOR THE TWELVE MONTHS ENDED DECEMBER 31, 1997
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                         ADJUSTMENTS
                                       PRO FORMA     HISTORICAL   --------------------------
                                      AQUA-CHEM(A)      NDC       ACQUISITION       OFFERING       PRO FORMA
                                      ------------   ----------   -----------       --------       ---------
<S>                                   <C>            <C>          <C>               <C>            <C>
Net sales...........................    $191,159      $58,106      $     --         $     --       $249,265
Cost of goods sold..................     140,950       45,066           101(b)            --        186,117
                                        --------      -------      --------         --------       --------
  Gross margin......................      50,209       13,040          (101)              --         63,148
Selling, general and administrative
  expenses..........................      39,376        5,815           795(b)            --         45,986
                                        --------      -------      --------         --------       --------
Operating income....................      10,833        7,225          (896)              --         17,162
Other income (expenses):
  Interest income...................         459          242            --               --            701
  Interest expense..................      (5,745)        (183)          183(c)        (8,823)(e)    (14,568)
  Other.............................         219           54            --               --            273
                                        --------      -------      --------         --------       --------
                                          (5,067)         113           183           (8,823)       (13,594)
Income before income taxes, minority
  interest and extraordinary item...       5,766        7,338          (713)          (8,823)         3,568
Income tax expense (benefit)........       2,289           --         2,630(d)        (3,502)(f)      1,417
Minority interest in earnings of
  consolidated subsidiary...........         345           --            --               --            345
                                        --------      -------      --------         --------       --------
Net income from continuing
  operations........................       3,132        7,338        (3,343)          (5,321)         1,806
                                        ========      =======      ========         ========       ========
</TABLE>
 
    See Notes to Unaudited Pro Forma Consolidated Statements of Operations.
 
                                       37
<PAGE>   42
 
           UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS
                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1998
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                           HISTORICAL                ADJUSTMENTS
                                       -------------------   ----------------------------
                                       AQUA-CHEM     NDC     ACQUISITION         OFFERING         PRO FORMA
                                       ---------   -------   -----------         --------         ---------
<S>                                    <C>         <C>       <C>                 <C>              <C>
Net sales............................  $142,734    $21,665      $  --            $    --          $164,399
Cost of goods sold...................   107,820     17,282         50(b)              --           125,152
                                       --------    -------      -----            -------          --------
     Gross margin....................    34,914      4,383        (50)                --            39,247
Selling, general and administrative
  expenses...........................    29,178      3,450        399(b)              --            33,027
Restructuring charges................     4,720         --         --                 --             4,720
                                       --------    -------      -----            -------          --------
Operating income (loss)..............     1,016        933       (449)                --             1,500
Other income (expenses):
     Interest income.................       321        572         --                 --               893
     Interest expense................    (6,662)       (78)        78(c)          (4,264)(e)       (10,926)
     Other...........................        65         (6)        --                 --                59
                                       --------    -------      -----            -------          --------
                                         (6,276)       488         78             (4,264)           (9,974)
Income (loss) before income taxes,
  minority interest and extraordinary
  item...............................    (5,260)     1,421       (371)            (4,264)           (8,474)
Income tax expense (benefit).........    (1,637)        --        417(d)          (2,144)(f)        (3,364)
Minority interest in earnings of
  consolidated subsidiary............       232         --         --                 --               232
                                       --------    -------      -----            -------          --------
Net income (loss) from continuing
  operations.........................    (3,855)     1,421       (788)            (2,120)           (5,342)
                                       ========    =======      =====            =======          ========
</TABLE>
 
    See Notes to Unaudited Pro Forma Consolidated Statements of Operations.
 
                                       38
<PAGE>   43
 
       NOTES TO UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS
                             (DOLLARS IN THOUSANDS)
 
(a) Represents Aqua-Chem's Statement of Operations for the period January 1,
    1997 to July 31, 1997, prepared using Aqua-Chem's historical basis of
    accounting and Aqua-Chem's Statement of Operations for the period August 1,
    1997 to December 31, 1997, prepared under a new basis of accounting that
    reflects the fair values of assets acquired and liabilities assumed, the
    related financing cost and all debt incurred in connection with the
    Management Buy-Out, on a combined basis, adjusted as follows:
 
<TABLE>
<CAPTION>
                                                       HISTORICAL
                                       -------------------------------------------                      PRO FORMA
                                       SEVEN MONTHS   FIVE MONTHS    TWELVE MONTHS                    TWELVE MONTHS
                                          ENDED          ENDED           ENDED       MANAGEMENT           ENDED
                                         JULY 31,     DECEMBER 31,   DECEMBER 31,      BUY-OUT        DECEMBER 31,
                                           1997           1997           1997        ADJUSTMENTS          1997
                                       ------------   ------------   -------------   -----------      -------------
                                                                  (DOLLARS IN THOUSANDS)
<S>                                    <C>            <C>            <C>             <C>              <C>
Net sales.............................   $99,618        $91,541        $191,159        $    --          $191,159
Cost of goods sold....................    73,656         66,333         139,989            961(i)        140,950
                                         -------        -------        --------        -------          --------
  Gross margin........................    25,962         25,208          51,170           (961)           50,209
Selling, general and administrative
  expenses............................    23,323         17,136          40,459         (1,083)(i)        39,376
                                         -------        -------        --------        -------          --------
Operating income......................     2,639          8,072          10,711            122            10,833
Other income (expenses):
  Interest income.....................       450            202             652           (193)(ii)          459
  Interest expense....................      (753)        (2,559)         (3,312)        (2,433)(iii)      (5,745)
  Other...............................       110             57             167             52(iv)           219
                                         -------        -------        --------        -------          --------
                                            (193)        (2,300)         (2,493)        (2,574)           (5,067)
Income before income taxes and
  minority interest...................     2,446          5,772           8,218         (2,452)            5,766
Income tax expense....................       421          2,289           2,710           (421)(v)         2,289
Minority interest in earnings of
  consolidated subsidiary.............       171            174             345             --               345
                                         -------        -------        --------        -------          --------
Net income from continuing
  operations..........................     1,854          3,309           5,163         (2,031)            3,132
                                         =======        =======        ========        =======          ========
</TABLE>
 
       --------------------------------------------------
 
<TABLE>
<S>    <C>                                                           <C>
(i)    Reflects the historical results of operations of Aqua-Chem adjusted
       for the period from January 1, 1997 to the Management Buy-Out date as
       follows:
</TABLE>
 
<TABLE>
<CAPTION>
                                                         COST OF      SELLING, GENERAL
                                                        GOODS SOLD   AND ADMINISTRATIVE
                                                        ----------   ------------------
<S>    <C>                                              <C>          <C>
         Additional depreciation expense due to the
         recording of fixed assets at fair market
         value........................................     $961           $   290
         Reduction of postretirement benefits expense
         due to the recognition of the full
         accumulated postretirement benefit
         liability....................................       --              (102)
         Amortization of intangible assets resulting
         from the Management Buy-Out (40 year
         amortization)................................       --                20
         Elimination of certain payments to management
         from the Management Buy-Out (See "Management
         -- Executive Compensation" and "Certain
         Relationships and Related Transactions --
         Management Agreements.").....................       --            (1,291)
                                                           ----           -------
                                                           $961           $(1,083)
                                                           ====           =======
</TABLE>
 
<TABLE>
<S>    <C>                                                           <C>
(ii)   Reflects a reduction of interest income for $6,600 of cash used in
       the Management Buy-Out at a rate of 5.0%.
(iii)  Reflects additional interest expense determined as follows:
       Amortization of deferred financing costs....................  $   333
       Annualized interest on existing subordinated debt ($21,000 @
       10.5%)......................................................    2,205
       Annualized interest on existing revolving credit facility
       ($5,000 @ 8.0%).............................................      400
       Annualized interest on existing term loan facility ($40,000
       @ 8.0%).....................................................    3,200
       Less: interest on $6,000 of principal payments against the
       existing debt...............................................     (393)
                                                                     -------
                                                                       5,745
       Less: historical interest expense...........................   (3,312)
                                                                     -------
                                                                     $ 2,433
                                                                     =======
</TABLE>
 
                                       39
<PAGE>   44
<TABLE>
<S>    <C>                                                           <C>
       A one-eighth of 1% (0.125%) change in the interest rate
       payable on the outstanding amount of the existing revolving
       credit facility would change annual interest expense by $6
       before the effect of income taxes.
(iv)   Reflects the elimination of amortization of deferred
       financing for debt retired in conjunction with the
       Management Buy-Out.
(v)    Reflects the pro forma tax effects of all adjustments using
       Aqua-Chem's consolidated effective tax rate for the
       applicable period. See Note 10 to Aqua-Chem's consolidated
       financial statements for a reconciliation from the statutory
       tax rate to the effective tax rate.
</TABLE>
 
(b) Reflects the historical results of operations of NDC, adjusted as follows:
 
<TABLE>
<CAPTION>
                                                 TWELVE MONTHS ENDED               NINE MONTHS ENDED
                                                  DECEMBER 31, 1997                SEPTEMBER 30, 1998
                                            ------------------------------   ------------------------------
                                                               SELLING,                         SELLING,
                                            COST OF GOODS    GENERAL AND     COST OF GOODS    GENERAL AND
                                                SOLD        ADMINISTRATIVE       SOLD        ADMINISTRATIVE
                                            -------------   --------------   -------------   --------------
    <S>                                     <C>             <C>              <C>             <C>
    Additional depreciation expense due to
      the recording of fixed assets at
      fair market value...................      $ 181            $ 45            $  90            $ 23
    Additional depreciation expense due to
      the recording of fixed assets at the
      Company's lives.....................        120              30               60              16
    Amortization of intangible assets
      resulting from the Acquisition (40
      year amortization)..................         --             720               --             360
    Reduction of insurance premiums.......       (200)             --             (100)             --
                                                -----            ----            -----            ----
                                                $ 101            $795            $  50            $399
                                                =====            ====            =====            ====
</TABLE>
 
    In addition to the adjustments reflected above, Aqua-Chem will eliminate the
    employment costs of former owners (net of estimated costs of replacing
    management). The impact of eliminating these employment costs will be to
    decrease Selling, General and Administrative Expense by approximately $600
    and $75 in the twelve months ended December 31, 1997 and the nine months
    ended September 30, 1998, respectively.
 
(c) Reflects the elimination of interest expense on NDC's short term borrowings
that would not be required.
 
(d) Reflects the pro forma tax effects of NDC being taxed as a C-Corporation.
 
(e) Reflects additional interest expense resulting from the Private Offering as
follows:
 
<TABLE>
<CAPTION>
                                                                  TWELVE MONTHS    NINE MONTHS
                                                                      ENDED           ENDED
                                                                  DECEMBER 31,    SEPTEMBER 30,
                                                                      1997            1998
                                                                  -------------   -------------
    <S>                                                           <C>             <C>
    The Notes...................................................     $14,063         $10,547
    Amortization of deferred financing fees associated with the
      Private Offering..........................................         505             379
                                                                     -------         -------
                                                                      14,568          10,926
    Less historical interest expense............................      (5,745)         (6,662)
                                                                     -------         -------
                                                                     $ 8,823         $ 4,264
                                                                     =======         =======
</TABLE>
 
(f) Reflects the pro forma tax effects of all adjustments using Aqua-Chem's
    effective tax rate for the applicable period. See Note 10 to Aqua-Chem's
    consolidated financial statements for a reconciliation from the statutory
    tax rate to the effective tax rate.
 
                                       40
<PAGE>   45
 
                      SELECTED FINANCIAL DATA OF AQUA-CHEM
 
     The following table sets forth selected historical financial data of
Aqua-Chem as of and for: (i) each of the two years ended December 31, 1996 and
1995, derived from the consolidated financial statements of Aqua-Chem, which
have been audited by KPMG Peat Marwick LLP, Milwaukee, Wisconsin and are
included elsewhere in this Prospectus; (ii) each of the years ended December 31,
1994 and 1993, derived from the consolidated financial statements of Aqua-Chem,
which have been audited by KPMG Peat Marwick LLP, Milwaukee, Wisconsin but are
not included in this Prospectus; (iii) the seven-month period ended July 31,
1997 and the five-month period ended December 31, 1997, derived from the
consolidated financial statements of Aqua-Chem, which have been audited by
Arthur Andersen LLP, Milwaukee, Wisconsin, and are included elsewhere in this
Prospectus; and (iv) the two months ended September 30, 1997, the seven months
ended July 31, 1997, and the nine months ended September 30, 1998, derived from
the unaudited financial statements of Aqua-Chem included elsewhere in this
Prospectus, which include all adjustments that management considers necessary to
present fairly the financial results for these interim periods, all of which
were of a normal recurring nature. The results of operations for such interim
periods are not necessarily indicative of results to be expected for the full
year. This table should be read in conjunction with "Management's Discussion and
Analysis of Financial Condition and Results of Operations of Aqua-Chem" and the
consolidated financial statements of Aqua-Chem included elsewhere in this
Prospectus.
<TABLE>
<CAPTION>
                                                                               SEVEN                        SEVEN
                                           FISCAL YEAR ENDED                   MONTHS       FIVE MONTHS     MONTHS
                                              DECEMBER 31,                     ENDED           ENDED        ENDED
                              --------------------------------------------    JULY 31,      DECEMBER 31,   JULY 31,
                                1993        1994        1995        1996      1997(A)         1997(A)        1997
                              --------    --------    --------    --------    --------      ------------   --------
                                                             (DOLLARS IN THOUSANDS)
<S>                           <C>         <C>         <C>         <C>         <C>           <C>            <C>
STATEMENT OF OPERATIONS
 DATA:
Net sales...................  $184,254    $187,486    $183,368    $199,552    $ 99,618        $ 91,541     $ 99,618
Cost of goods sold..........   139,980     144,490     148,650     153,446      73,656          66,333       73,656
                              --------    --------    --------    --------    --------        --------     --------
 Gross margin...............    44,274      42,996      34,718      46,106      25,962          25,208       25,962
Selling, general and
 administrative expenses....    39,080      40,981      37,772      34,446      23,323          17,136       23,323
Restructuring charges(b)....        --       9,011       4,593       5,038          --              --           --
                              --------    --------    --------    --------    --------        --------     --------
 Operating income (loss)....     5,194      (6,996)     (7,647)      6,622       2,639           8,072        2,639
Other income (expense):
 Interest income............       301         252         358         464         450             202          450
 Interest expense...........    (1,075)     (1,200)     (1,663)     (1,448)       (753)         (2,559)        (753)
 Other income (expense).....       734         639       2,635        (806)        110              57          110
                              --------    --------    --------    --------    --------        --------     --------
Earnings (loss) before
 income taxes, minority
 interest and extraordinary
 item.......................     5,154      (7,305)     (6,317)      4,832       2,446           5,772        2,446
Income tax expense
 (benefit)..................     2,191      (2,806)        189         507         421           2,289          421
Minority interest in
 earnings (loss) of
 consolidated subsidiary....       211         179         (52)        231         171             174          171
                              --------    --------    --------    --------    --------        --------     --------
Net income (loss) before
 extraordinary item.........     2,752      (4,678)     (6,454)      4,094       1,854           3,309        1,854
Extraordinary item, net of
 tax........................        --          --          --          --          --              --           --
                              --------    --------    --------    --------    --------        --------     --------
 Net income (loss)..........  $  2,752    $ (4,678)   $ (6,454)   $  4,094    $  1,854        $  3,309     $  1,854
                              ========    ========    ========    ========    ========        ========     ========
OTHER FINANCIAL DATA:
EBITDA(c)...................  $  9,310    $ (3,028)   $ (4,494)   $  9,606    $  4,329        $  9,356     $  4,329
Adjusted EBITDA(d)..........     9,310        (417)     (3,286)     10,017       4,329          10,043        4,329
Gross profit margin.........      24.0%       22.9%       18.9%       23.1%       26.1%           27.5%        26.1%
Total depreciation and
 amortization...............  $  4,116    $  3,968    $  3,153    $  2,984    $  1,690        $  1,284     $  1,690
Capital expenditures........     4,832       1,594       4,867       2,789       2,195           1,197        2,195
Cash provided by (used for)
 operating activities.......    (1,373)        891      (1,551)      8,052       4,857           9,311        4,857
Cash provided by (used for)
 investing activities.......    (4,741)      1,973        (939)     (1,025)       (881)        (50,699)        (881)
Cash provided by (used for)
 financing activities.......     1,003      (1,498)        538       1,492           6          40,715            6
 
BALANCE SHEET DATA (AT END
 OF PERIOD):
Total assets................  $109,744    $104,133    $101,381    $101,000    $     --        $124,661     $     --
Total debt..................    19,296      18,098      18,636      20,128          --          59,691           --
Redeemable preferred
 stock......................        --          --          --          --          --           7,365           --
Stockholders' equity
 (deficit)..................    46,738      42,254      36,636      39,960          --           3,638           --
 
<CAPTION>
 
                               TWO MONTHS      NINE MONTHS
                                  ENDED           ENDED
                              SEPTEMBER 30,   SEPTEMBER 30,
                                  1997            1998
                              -------------   -------------
 
<S>                           <C>             <C>
STATEMENT OF OPERATIONS
 DATA:
Net sales...................    $ 35,875        $142,734
Cost of goods sold..........      26,129         107,820
                                --------        --------
 Gross margin...............       9,746          34,914
Selling, general and
 administrative expenses....       6,993          29,178
Restructuring charges(b)....          --           4,720
                                --------        --------
 Operating income (loss)....       2,753           1,016
Other income (expense):
 Interest income............          63             321
 Interest expense...........      (1,003)         (6,662)
 Other income (expense).....          34              65
                                --------        --------
Earnings (loss) before
 income taxes, minority
 interest and extraordinary
 item.......................       1,847          (5,260)
Income tax expense
 (benefit)..................         739          (1,637)
Minority interest in
 earnings (loss) of
 consolidated subsidiary....          66             232
                                --------        --------
Net income (loss) before
 extraordinary item.........       1,042          (3,855)
Extraordinary item, net of
 tax........................          --           1,260
                                --------        --------
 Net income (loss)..........    $  1,042        $ (5,115)
                                ========        ========
OTHER FINANCIAL DATA:
EBITDA(c)...................    $  3,557        $  4,415
Adjusted EBITDA(d)..........       4,244           5,844
Gross profit margin.........        27.2%          24.5%
Total depreciation and
 amortization...............    $    804        $  3,399
Capital expenditures........         641           1,772
Cash provided by (used for)
 operating activities.......         415         (12,833)
Cash provided by (used for)
 investing activities.......     (52,692)        (49,617)
Cash provided by (used for)
 financing activities.......      41,711          56,628
BALANCE SHEET DATA (AT END
 OF PERIOD):
Total assets................    $     --        $181,523
Total debt..................          --         125,000
Redeemable preferred
 stock......................          --              --
Stockholders' equity
 (deficit)..................          --          (2,914)
</TABLE>
 
- ------------------------------------
(a) On July 31, 1997, Aqua-Chem management and its shareholders acquired
    Aqua-Chem in the Management Buy-Out, which was treated as a purchase. As a
    result, all periods presented prior to August 1, 1997 were prepared using
    Aqua-Chem's historical basis of accounting. All periods presented subsequent
    to July 31, 1997 reflect the fair values of the assets acquired and
    liabilities assumed in the Management Buy-Out.
 
                                       41
<PAGE>   46
 
(b) For 1994 and 1995, reflects restructuring charges required to complete the
    1994 Restructuring. For 1996, reflects restructuring charges required to
    complete the 1996 Restructuring. For the nine months ended September 30,
    1998, reflects restructuring charges to complete the 1998 Restructuring. For
    further information on such restructurings, see "Management's Discussion and
    Analysis of Financial Condition and Results of Operations of Aqua-Chem,"
    Note (3) to the consolidated financial statements of Aqua-Chem and Note (7)
    to the consolidated condensed interim financial statements of Aqua-Chem, all
    included elsewhere in this Prospectus.
 
(c) EBITDA is defined as operating income before depreciation and amortization.
    While EBITDA is not intended to represent cash flow from operations as
    defined by generally accepted accounting principles ("GAAP") and should not
    be considered as an indicator of operating performance or an alternative to
    cash flow (as measured by GAAP) as a measure of liquidity, it is included
    herein because management believes that certain investors find it to be a
    useful tool for measuring the ability of the Company to meet its future debt
    service capital expenditures and working capital requirements. When
    evaluating EBITDA, investors should also consider the Company's minimum
    annual principal repayments of long-term debt and other long-term
    commitments as well as cash flows from operating, investing, and financing
    activities. See the Consolidated Statements of Cash Flows of Aqua-Chem and
    of NDC and the related notes thereto included in this Prospectus. In
    addition, investors should consider the Company's discussion of liquidity
    and capital resources as disclosed within Management's Discussion and
    Analysis of Financial Condition and Results of Operations of Aqua-Chem and
    Management's Discussion and Analysis of Financial Condition and Results of
    Operations of NDC.
 
(d) Adjusted EBITDA for the periods presented is defined as EBITDA excluding
    non-cash restructuring charges, and, in the five months ended December 31,
    1997 and the two months ended September 30, 1997, excludes $687 of non-cash
    purchase accounting adjustments to cost of goods sold related to writing up
    inventory to fair market value at the time of the Management Buy-Out. For
    the nine months ended September 30, 1998, $1,429 of non-cash purchase
    accounting adjustments are excluded to reflect the non-cash purchase
    accounting adjustments to cost of goods sold related to writing up inventory
    to fair market value at the time of the Acquisition.
 
                                       42
<PAGE>   47
 
               MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                CONDITION AND RESULTS OF OPERATIONS OF AQUA-CHEM
 
     The following discussion should be read in conjunction with, and is
qualified in its entirety by reference to the consolidated financial statements
of Aqua-Chem appearing elsewhere in this Prospectus. For information regarding
the pro forma financial condition of Aqua-Chem, see "Unaudited Pro Forma
Financial Data" and " -- Liquidity and Capital Resources."
 
     Due to purchase accounting adjustments resulting from the Management
Buy-Out on July 31, 1997, the seven-month period ended July 31, 1997 and the
five-month period ended December 31, 1997 are not comparable in all material
respects. The financial data for the seven-month period ended July 31, 1997 and
the five-month period ended December 31, 1997 are presented within "Selected
Financial Data of Aqua-Chem." The pro forma financial data for the twelve months
ended December 31, 1997 was prepared using Aqua-Chem's historical results for
the year then ended, adjusted to reflect the Management Buy-Out as if the
Management Buy-Out had occurred on January 1, 1997. See footnote (a) to the
Notes to Unaudited Pro Forma Consolidated Statements of Operations under
"Unaudited Pro Forma Financial Data." The pro forma financial data for the
twelve months ended December 31, 1997 is discussed below in order to make
comparisons to the years ended December 31, 1996 and 1995.
 
RESULTS OF OPERATIONS
 
     Composition of net sales for Cleaver-Brooks and Water Technologies for the
periods indicated is listed below.
 
<TABLE>
<CAPTION>
                                                                     PRO FORMA
                                                                       TWELVE
                                               FISCAL YEAR ENDED       MONTHS       NINE MONTHS ENDED
                                                 DECEMBER 31,          ENDED          SEPTEMBER 30,
                                              -------------------   DECEMBER 31,   -------------------
                                               1995         1996        1997        1997         1998
                                              ------       ------   ------------   ------       ------
                                                               (DOLLARS IN MILLIONS)
<S>                                           <C>          <C>      <C>            <C>          <C>
Net sales:
  Cleaver-Brooks............................  $144.7       $155.6      $154.9      $110.6       $ 98.6
  Water Technologies........................    38.7         44.0        36.3        24.9         25.9
  National Dynamics.........................      --           --          --          --         18.2
                                              ------       ------      ------      ------       ------
          Total.............................  $183.4       $199.6      $191.2      $135.5       $142.7
                                              ======       ======      ======      ======       ======
</TABLE>
 
NINE MONTHS ENDED SEPTEMBER 30, 1998 COMPARED TO NINE MONTHS ENDED SEPTEMBER 30,
1997
 
     Net Sales. Net sales for the nine month period ended September 30, 1998
increased $7.2 million to $142.7 million from $135.5 million. This increase was
primarily attributable to the acquisition of National Dynamics Corporation which
occurred on June 23, 1998. The National Dynamics Division ("National Dynamics")
contributed $18.2 million in net sales since the date of acquisition. Net sales
of Cleaver-Brooks declined $12.0 million (10.8%). Approximately 43.3% of the
decrease resulted from the sale of the contract machining business in the fourth
quarter of 1997 with the remainder attributable to soft orders during the second
half of 1997 through the first quarter of 1998. Water Technologies sales
increased $1.0 million (4.0%) during the same time period primarily due to a
large land-based water desalination project.
 
     Gross Margin. Gross margin declined $0.8 million (2.2%) to $34.9 million
from $35.7 million for the same period in 1997. The gross margin percentage
decreased 1.9% to 24.5% primarily due to the inclusion of National Dynamics
operations for the first time in 1998. Margins at National Dynamics reflected an
inventory write-up of $1.4 million. Additionally, after adjustment for the
inventory write-up, National Dynamics' gross margin is 19.2% which is
substantially less than Aqua-Chem's normal margins without National Dynamics.
Also, depreciation expense was higher in 1998 as a result of the step-up in
basis of the fixed assets in connection with the Management Buy-Out on July 31,
1997.
 
                                       43
<PAGE>   48
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expense declined $1.1 million (3.8%) to $29.2 million.
Commissions to independent representatives and to internal sales personnel were
$0.8 million lower in the current period due to the reduced sales volume. The
acquisition of National Dynamics in June 1998 increased selling, general and
administrative expenses $1.4 million which is offset by $1.3 million of certain
non-recurring expenses related to the Management Buy-Out in 1997.
 
     Restructuring Charges. A restructuring charge of $4.7 million was recorded
in the current period as a result of the Board of Directors' approval of the
1998 Restructuring. The provision included $3.0 million to write down the value
of certain fixed assets and inventory, $1.5 million for employee severance and
additional workers compensation related costs and $0.2 million for other related
costs.
 
     Operating Income. For the reasons set forth above, operating income
decreased $4.2 million to $1.0 million. Excluding the $4.7 million restructuring
charge, operating income increased $0.5 million to $5.7 million compared to $5.2
million for the nine months ended September 30, 1997. The inclusion of National
Dynamic's operations contributed $0.7 million to operating income.
 
     Other Income (Expense). Other income (expense) for the nine months ended
September 30, 1998 was an expense of $6.3 million as compared to an expense of
$1.1 million for the same period in 1997, resulting in a difference of $5.2
million (471.1%). $4.9 million of this difference is due to increased debt
issued in conjunction with the Management Buy-Out and the Private Offering.
Additionally, interest income declined $0.2 million due to the use of
cash-on-hand in conjunction with the Management Buy-Out.
 
TWELVE MONTHS ENDED DECEMBER 31, 1997 (PRO FORMA) COMPARED TO YEAR ENDED
DECEMBER 31, 1996
 
     As previously discussed, the financial data for the year ended December 31,
1997 is presented on a pro forma basis, giving effect to the Management Buy-Out,
as if it occurred on January 1, 1997.
 
     Pro Forma Net Sales. Pro forma net sales declined $8.4 million (4.2%) in
1997 to $191.2 million from $199.6 million in 1996. Net sales attributable to
Cleaver-Brooks were relatively flat at $154.9 million in 1997, primarily due to
a decline of $5.5 million in sales to the Asia Pacific region and $2.0 million
in reduced sales resulting from the sale of two small product lines, offset by
continued strong domestic demand for firetube boilers. Net sales attributable to
Water Technologies decreased $7.7 million (17.5%) to $36.3 million in 1997,
primarily due to the deferral of certain significant orders for water
purification and treatment systems during the period, partially offset by
increased demand for distillation systems for pharmaceutical and offshore oil
applications.
 
     Pro Forma Gross Margin. Pro forma gross margin increased $4.1 million
(8.9%) in 1997 to $50.2 million from $46.1 million in 1996 despite a 4.2%
decline in net sales. Gross margin as a percentage of net sales improved to
26.3% in 1997 from 23.1% in 1996 due to (i) improved manufacturing efficiencies
at Aqua-Chem's Thomasville boiler plant, (ii) improvements in the product mix,
(iii) the completion of a large, unprofitable water purification and treatment
project in 1996 for which the Company accrued $2.0 million in 1996 for
additional estimated losses and (iv) the in-sourcing of certain key boiler
components.
 
     Pro Forma Selling, General and Administrative Expenses. Pro forma selling,
general and administrative expenses were $39.4 million in 1997, an increase of
$5.0 million (14.3%) from $34.4 million in 1996. Selling, general and
administrative expenses as a percentage of net sales was 20.6% in 1997 as
compared with 17.3% in 1996. This increase was due primarily to a $1.0 million
increase in information systems spending and increased travel expenditures
related to Aqua-Chem's sales and marketing efforts as such expenditures returned
to normalized levels following their curtailment in 1996.
 
     Restructuring Charges. Aqua-Chem did not record any restructuring charges
in 1997 as compared with $5.0 million in 1996 related to the 1996 Restructuring.
 
     Pro Forma Operating Income. For the reasons set forth above, pro forma
operating income increased $4.0 million (60.6%) in 1997 to $10.6 million from
$6.6 million in 1996.
 
     Pro Forma Other Income (Expense). Pro forma other income (expense) for 1997
was an expense of $5.1 million as compared to an expense of $1.8 million in
1996, resulting in a difference of $3.3 million (183.1%).
                                       44
<PAGE>   49
 
This difference was due primarily to the increase in interest expense of $4.3
million as a result of increased debt issued in conjunction with the Management
Buy-Out. This increase is offset by a $0.3 million loss recorded in 1996 for
additional charges related to a disposed product line.
 
SEVEN MONTHS ENDED JULY 31, 1997 AND FIVE MONTHS ENDED DECEMBER 31, 1997
 
     In addition to the comparative analysis of the pro forma operating results
for the year ended December 31, 1997 presented above, the following paragraphs
will specifically address the actual results for the seven months ended July 31,
1997 and the five months ended December 31, 1997. As noted on the accompanying
Selected Financial Data table, these periods have a different basis of
accounting as a result of the Management Buy-Out effective on July 31, 1997. For
a comparative analysis of the 1997 operating results to 1996, see the narrative
presented above.
 
     Net Sales and Gross Margin. Net sales and gross margin for the seven months
ended July 31, 1997 were $99.6 million and $26.0 million, respectively. The net
sales and gross margin for the five months ended December 31, 1997 were $91.5
million and $25.2 million, respectively. The gross margin as a percentage of net
sales for those periods was 26.1% and 27.5%, respectively. The higher gross
margin for the five month period of December 31, 1997 results from the mix of
products and higher production levels in that period. A comparison to 1996 gross
margin levels is described in the aforementioned paragraphs.
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expenses for the seven months ended July 31, 1997 and five months
ended December 31, 1997 were $23.3 million and $17.1 million, respectively. This
represents 23.4% and 18.7% as a percentage of net sales for the respective
periods. The significantly higher costs as a percentage of sales in the seven
months ended July 31, 1987, is attributable to higher information systems costs
and travel expenses in the first seven months of the year. These amounts also
include certain payments to management in conjunction with the Management
Buy-Out of $1.3 million.
 
     Other Income. Other income (expense) for the seven months ended July 31,
1997 and the five months ended December 31, 1997 was ($193) and ($2,300),
respectively. The substantially higher expenses in the five months ended
December 31, 1997 result primarily from the higher interest expense associated
with the increased debt issued in conjunction with the Management Buy-Out.
 
YEAR ENDED DECEMBER 31, 1996 COMPARED TO YEAR ENDED DECEMBER 31, 1995
 
     Net Sales. Net sales increased $16.2 million (8.8%) in 1996 to $199.6
million from $183.4 million in 1995. Excluding the impact of product lines or
businesses sold during 1995 and 1996, net sales increased $20.2 million (11.8%)
in 1996. This increase was primarily attributable to (i) significantly improved
throughput at the Thomasville facility, which allowed Aqua-Chem to reduce a
backlog of boiler orders that had grown substantially in the second half of
1995; (ii) improved pricing; and (iii) higher sales to the U.S. Navy by Water
Technologies. Net sales attributable to Cleaver-Brooks increased $10.9 million
(7.5%) in 1996 to $155.6 million. During 1996, significant improvements were
made to the Thomasville plant which assumed production of large firetube boilers
during 1995. Additional training, opening a component shop and a tube mill, and
various improvements in quality allowed Cleaver-Brooks to reduce the backlog of
boiler orders which accumulated during late 1995 as a result of the combination
of strong order activity and production inefficiencies associated with the
transition of production from Lebanon to Thomasville and Stratford. Net sales
attributable to Water Technologies increased $5.3 million (13.9%) in 1996 to
$44.0 million, primarily due to increased U.S. Navy volume resulting from
progress on large percentage of completion contracts and a large land-based
water desalination project.
 
     Gross Margin. Gross margin increased $11.4 million (32.8%) to $46.1 million
in 1996 from $34.7 million in 1995. Gross margin as a percentage of net sales
improved to 23.1% in 1996 from 18.9% in 1995 primarily due to (i) smaller losses
attributed to a certain large water purification and treatment contract ($2.0
million was accrued in 1996 for additional estimated losses while $5.9 million
was originally accrued in 1995), (ii) improved pricing, (iii) manufacturing
efficiencies at Aqua-Chem's Thomasville facility, and (iv) the in-sourcing of
certain components in Thomasville that previously had been purchased from third
party vendors.
 
                                       45
<PAGE>   50
 
Additionally, the improvement in the gross margin was impacted by greater
operating leverage as Aqua-Chem spread more volume over its fixed cost base.
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expenses decreased $3.4 million (8.8%) to $34.4 million in 1996
from $37.8 million in 1995 primarily due to the impact of the 1996
Restructuring. Selling, general and administrative expense as a percentage of
net sales was 17.3% in 1996 as compared with 20.6% in 1995.
 
     Restructuring Charges. Restructuring charges were $5.0 million in 1996 as
compared with $4.6 million in 1995. The restructuring charges incurred in 1995
represented expenditures that resulted from 1995 activity under the 1994
Restructuring that could not be accrued in 1994. The restructuring charges
incurred in 1995 included $0.6 million for employee termination expenditures,
$1.6 million for expenditures related to closing and selling the Lebanon
facility and $2.4 million for expenditures related to manufacturing
inefficiencies incurred at the Thomasville and Stratford plants during the
transfer and start-up of certain boiler manufacturing operations previously
performed at Lebanon.
 
     Operating Income. For the reasons set forth above, operating income
increased $14.2 million in 1996 to $6.6 million from a loss of $7.6 million in
1995.
 
     Other Income (Expense). In 1996 other expense was $1.8 million as compared
to other income of $1.3 million for 1995 resulting, in a decrease of $3.1
million (234.6%). This decrease was due primarily to a gain of $1.9 million on
the disposal of a subsidiary during 1995 and a $0.4 million gain on the disposal
of the incineration boiler product line. Additionally, in 1995 fixed asset
disposals resulted in a gain of $0.5 million as compared to no gain or loss on
disposal in 1996. During 1996, a loss of $0.3 million was recorded for
additional charges related to a disposed product line.
 
LIQUIDITY AND CAPITAL RESOURCES
 
  Comparison of Nine Months Ended September 30, 1998 and 1997
 
     Cash used in operating activities was $12.8 million for the nine months
ended September 30, 1998 compared to cash provided by operating activities of
$5.3 million for the same period in 1997. The decrease of $18.1 million is due
primarily to $1.7 million of additional interest expense due to the increased
debt levels resulting from the issuance of $125 million in notes and the
subsequent acquisition of National Dynamics, $3.0 million decrease in accounts
payable, and a decrease in accrued expenses of $10.1 million which includes $2.7
million in litigation settlement payments, $2.3 million in increased performance
related incentives and $2.0 of income tax payments.
 
     Cash used in investing activities was $49.6 million for the nine months
ended September 30, 1998 compared to a net use of $53.6 million for the same
period in 1997. The current period included $47.9 million for the purchase of
National Dynamics Corporation and capital expenditures of $1.8 million. The
prior year period included $52.1 million for the Management Buy-Out of the
Company and $2.8 million of capital expenditures.
 
     Cash provided by financing activities was $56.6 million for the nine months
ended September 30, 1998 compared to $41.7 million for the same period in 1997.
The current period included $125.0 million of proceeds from the issuance of
notes and advances under the revolving credit agreement and repayments of senior
and subordinated debt and preferred stock of $66.3 million in conjunction with
the 11 1/4% notes offering. The increase was also offset by deferred financing
costs of $5.1 million related to the issuance of the notes in the current
period. The prior year period included $68.2 million of proceeds from senior and
subordinated debt and the issuance of preferred stock in conjunction with the
Management Buy-Out. This increase was partially offset by the repayment of debt
of $25.0 million and deferred financing costs of $2.0 million related to the
Management Buy-Out.
 
  Comparison of Years Ended December 31, 1997, 1996 and 1995.
 
     Cash provided by operating activities was $14.2 million for the twelve
months ended December 31, 1997 compared to $8.1 million for the same period in
1996. The increase of $6.1 million was attributable primarily to changes in
billings in excess of revenues which increased principally due to progress
billings on large contracts. Accrued expenses and other current liabilities also
increased over the prior year as a result of
                                       46
<PAGE>   51
 
performance related incentives. Less cash was generated by reductions in
inventory during the twelve months ended December 31, 1997 than in the prior
year. For the fiscal year ended December 31, 1995, cash used in operating
activities was $1.6 million.
 
     Cash used in investing activities was $51.6 million in the twelve months
ended December 31, 1997 compared to $1.0 million in 1996 and $0.9 million in
1995. The current period included $52.1 million for the Management Buy-Out.
Capital expenditures for the current period were $3.4 million as compared to
$2.8 million in fiscal 1996 and $4.9 million in fiscal 1995. These expenditures
relate to ongoing maintenance and upgrades to Aqua-Chem's manufacturing
equipment and facilities and to certain replacement software systems. During the
most recent twelve months, Aqua-Chem invested $0.7 million in new mainframe
financial systems to replace aging systems. In 1995, Aqua-Chem spent $1.4
million for certain building additions and equipment upgrades at its Thomasville
facility, in part to accommodate the transfer of production from its Lebanon
facility.
 
     Cash provided by financing activities was $40.7 million in the twelve
months ended December 31, 1997 compared to $1.5 million in 1996 and $0.5 million
in 1995. The twelve months ended December 31, 1997 included $65.6 million in
proceeds from debt issued in connection with the Management Buy-Out and
repayments of $26.1 million, of which $20.0 million related to repayment of debt
outstanding at the time of the Management Buy-Out and $6.0 million related to
repayment of debt incurred as a result of the Management Buy-Out.
 
     Borrowing Availability and Limitations.
 
     The Company intends to fund future working capital, capital expenditures
and debt service requirements through cash flows generated from operating
activities and from borrowings under the New Credit Facility. The New Credit
Facility provides $45.0 million of borrowing availability and is secured by
substantially all assets of the Company. See "Description of Certain
Indebtedness." The Company expects to make approximately $1.5 million of capital
expenditures related to the proposed closure of its Greenville facility and $0.5
million to $1.0 million for certain equipment at National Dynamics. Apart from
these items, the Company believes that its manufacturing facilities and computer
software and hardware are generally adequate to meet projected needs.
 
     Under the New Credit Facility the Company is required to maintain an
adjusted consolidated tangible net worth (consolidated tangible net worth plus
an amount equal to the aggregate outstanding principle amount of subordinated
debt) of not less than $70 million plus (on a cumulative basis) for each fiscal
quarter ending on or after June 23, 1998, the sum of (a) 50% of consolidated net
income if positive and 100% of the cash proceeds of the issuance of any equity
interest of the Company during such fiscal quarter. In addition, the New Credit
Facility requires the Company to maintain a fixed charge coverage ratio of not
less than 1.25 to 1 and a senior funded debt to consolidated EBITDA ratio of not
more than 3.5 to 1.
 
     The Indenture prohibits the Company from incurring additional Indebtedness
unless, on the date of such incurrence and after giving effect thereto, the
Consolidated Coverage Ratio exceeds 2.0 to 1 if such Indebtedness is incurred
prior to January 1, 2000, 2.25 to 1 if such Indebtedness is incurred on or after
January 1, 2000 and prior to January 1, 2001 or 2.5 to 1 thereafter (the
"Coverage Limitation"). As of September 30, 1998, the Company could not have
incurred any additional Indebtedness under the Coverage Limitation.
 
     The Indenture further provides that, in addition to the additional
indebtedness which the Company may incur under the Coverage Limitation, the
Company may incur additional Indebtedness of certain types up to certain
limitations applicable to each type (the "Basket Limitations"). The Basket
Limitations are described under "Description of the Notes -- Certain Covenants
- -- Limitation on Indebtedness." The amount of additional Indebtedness which the
Company could have incurred as of September 30, 1998 under certain of the Basket
Limitations is impossible to quantify as of the date of this Prospectus because
those Basket Limitations relate to transactions or other events or conditions
that had not occurred or did not exist as of such date, and the applicable
dollar limitations thereunder depend upon the nature of such events or the
nature and terms of such transactions. Certain of the Basket Limitations relate
to intercompany transactions and guarantees, which would not increase the
aggregate amount of additional Indebtedness that may be incurred.
                                       47
<PAGE>   52
 
However, the Company could have incurred approximately $77.3 million of
additional Indebtedness under the remaining Basket Limitations on September 30,
1998, including the following: (a) Indebtedness pursuant to the New Credit
Facility of up to the greater of (i) $45.0 million or (ii) the sum of 50% of the
book value of inventory and 85% of the book value of accounts receivable as of
such date (however, the limitation under clause (ii) would have been
approximately $54.2 million at September 30, 1998; this limitation would not
have affected the maximum amount that could have been borrowed under the New
Credit Facility as of September 30, 1998 because the maximum amount of the New
Credit Facility on that date was $45.0 million); (b) Indebtedness by foreign
subsidiaries not exceeding the sum of (i) 60% of the book value of inventory and
(ii) 85% of the book value of accounts receivable; (c) purchase money
Indebtedness not exceeding the greater of (i) $20 million or (ii) 5% of the
consolidated net worth of the Company; and (d) an additional $10 million without
regard to the nature or purpose of such Indebtedness.
 
     Management believes that cash generated from operating activities together
with borrowing availability under the New Credit Facility will be adequate to
cover the Company's working capital, debt service and capital expenditure
requirements on a short and long term basis. The Company may, however, consider
other options available to it in connection with funding future working capital
and capital expenditure needs, including the issuance of additional debt and the
issuance of equity securities.
 
YEAR 2000
 
     Many computer software applications, hardware and equipment and embedded
chip systems identify dates using only the last two digits of the year. These
products may be unable to distinguish between dates in the year 2000 and dates
in the year 1900. That inability (referred to as the "Year 2000 Issue"), if not
addressed, could cause applications, equipment or systems to fail or provide
incorrect information after December 31, 1999, or when using dates after
December 31, 1999. The Company uses a number of computer software programs,
operating systems, and types of equipment with computer chips in its internal
operations, including applications used in its financial business systems, order
entry and manufacturing systems, manufacturing processes, and administrative
functions. The Company also manufactures products that incorporate components
purchased from other manufacturers that contain computer chips. To the extent
that the above listed items contain source code or computer chips that are
unable to interpret appropriately the upcoming calendar year 2000,
distinguishing it from the year 1900, some level of modification or possible
replacement will be necessary.
 
     STATE OF READINESS
 
     The Company has assessed and continues to assess the impact of the Year
2000 Issue on its operations. The Company's assessments have focused on the
three major element of the Year 2000 Issue: IT systems; Non-IT systems; and
third party relationships.
 
     IT SYSTEMS. Since 1996 the Company has been executing an IT system upgrade
plan, which includes leasing a new mainframe computer at an annual cost of $0.6
million and the expansion of and improvements to its networks and capital
spending on hardware totaling $0.2 million. Additionally, the Company has spent
$1.5 million on new financial systems software, of which $1.3 million has been
capitalized. These systems are replacing software that has been in use since the
early 1980s. The IT system upgrade plan was not undertaken in response to the
Year 2000 Issue, nor was it accelerated due to the Year 2000 Issue.
 
     Of these new financial systems, the general ledger and reporting packages
have been implemented, while the accounts receivable and accounts payable
packages are in the installation phase with a March 1999 targeted completion
date. Management believes these projects are currently on schedule to meet this
target date. The current human resource/payroll system has been upgraded to
address the Year 2000 Issue.
 
     The Company has received written assurances from the manufacturers that the
following hardware and software are Year 2000 compliant as a result of the IT
system upgrade plan: mainframe hardware; mainframe systems software; mainframe
operating system; LAN/WAN hardware; LAN/WAN operating systems; LAN/WAN system
software; personal computers and related software; and financial systems
software.
 
                                       48
<PAGE>   53
 
     The Company's order entry and manufacturing systems are in the process of
being upgraded to address the Year 2000 Issue. The databases for all of these
systems have been expanded and regenerated. Management believes the application
programs for these systems are on schedule to be converted by the end of
October, 1998, with testing to occur until production turnover in March, 1999.
Other non-Year 2000 IT efforts have not been materially delayed or impacted by
Year 2000 initiatives.
 
     NON-IT SYSTEMS. The Company has reviewed all of its communication systems
(phone and data transmission systems), fax machines, photocopiers, postage
machines, elevators, HVAC systems, security systems and shop floor equipment
with the manufacturers or vendors of those systems and equipment and has
received verbal assurances that these systems are Year 2000 compliant. Written
certifications of Year 2000 compliance for these systems has been requested from
the manufacturers or vendors. The Company is currently reviewing the responses
it has received to date and has sent a follow up letter to any manufacturers or
vendors who have not responded.
 
     THIRD PARTY RELATIONSHIPS. All of the Company's suppliers of raw materials,
components, and other goods and services have been sent a questionnaire
regarding their Year 2000 compliance and their plans to be Year 2000 compliant.
Over half of the suppliers contacted have responded. A follow up letter has been
sent to those suppliers who have yet to respond. For those remaining suppliers
who do not respond to this questionnaire, or who do not have a Year 2000
compliance plan in place, the Company has identified alternative suppliers and
will use an alternative supplier who has certified that it is Year 2000
compliant. For all suppliers of equipment containing computer chips which are
incorporated into the Company's products, the Company has received written
assurance that this equipment is Year 2000 compliant.
 
     COSTS TO ADDRESS THE COMPANY'S YEAR 2000 ISSUE.
 
     Costs incurred by the Company to date to address the Year 2000 Issue,
excluding the IT system upgrade costs, are approximately $0.1 million. The
Company estimates total costs remaining to be incurred prior to the year 2000
range from $0.2 million to $0.3 million. Maintenance or modification costs will
be expensed as incurred, while the costs of new software will be capitalized and
amortized over the software's useful life. These costs will be funded from
operating cash flows.
 
     RISKS AND CONTINGENCY PLANS. Although the Company believes its efforts will
adequately address the Year 2000 Issue internally, it is possible that the
Company will be adversely affected by problems encountered by its vendors or
suppliers. Despite any vendor's or supplier's certification regarding Year 2000
compliance there can be no assurance that the vendor's or supplier's ability to
provide goods and services will not be adversely affected by the Year 2000
Issue. The most likely worst case scenario would be that a failure by the
Company or one or more of its vendors or suppliers to adequately and timely
address the Year 2000 Issue, interrupts manufacturing of the Company's products
for a undeterminable period of time. The Company has identified and will
continue to identify alternative vendors should a vendor's ability to meet the
Company's raw material and supply requirements be impacted by the Year 2000
Issue. While the Company believes it can minimize the impact of such
non-compliance through the use of these alternative vendors, a disruption in
production could have a material adverse impact on the Company. The Company does
not currently expect to develop a formal contingency plan.
 
     GENERAL
 
     The costs of the Company's efforts to address the Year 2000 Issue and the
dates on which the Company believes it will complete such efforts are based upon
management's best estimates, which were derived using numerous assumptions
regarding future events. There can be no assurance that these estimates will
prove to be accurate, and actual results could differ materially from those
currently anticipated. Specific factors that could cause such material
differences include, but are not limited to, the Company's ability to identify,
assess, remediate and test relevant computer codes and embedded technology, the
Company's reliance on third-party assurances and the variability of definitions
of "Year 2000 compliance" which may be used by such third parties, and similar
uncertainties.
 
                                       49
<PAGE>   54
 
                         SELECTED FINANCIAL DATA OF NDC
 
     The following table sets forth selected historical financial data of NDC as
of and for each of fiscal years ended October 31, 1995, 1996 and 1997 and the
five-month periods ended March 31, 1997 and 1998. The historical financial data
under the captions Statement of Operations Data, Other Financial Data and
Balance Sheet Data for the fiscal years ended October 31, 1995 through 1997 have
been derived from the financial statements of NDC, which have been audited by
KPMG Peat Marwick LLP, Omaha, Nebraska, and are included elsewhere in this
Prospectus. The historical financial data for the five-month periods ended March
31, 1997 and 1998 have been derived from the unaudited condensed financial
statements of NDC included in this Prospectus, which include all adjustments
that management considers necessary to present fairly the financial results for
this interim period, all of which were of a normal recurring nature. The results
of operations for the five-month periods are not necessarily indicative of
results to be expected for the full year. This table should be read in
conjunction with "Management's Discussion and Analysis of Financial Condition
and Results of Operations of NDC" and the financial statements of NDC included
elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                         FISCAL YEAR ENDED          FIVE MONTHS ENDED
                                                            OCTOBER 31,                 MARCH 31,
                                                   -----------------------------    ------------------
                                                    1995       1996       1997       1997       1998
                                                   -------    -------    -------    -------    -------
                                                                 (DOLLARS IN THOUSANDS)
<S>                                                <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Net sales....................................    $48,457    $54,845    $58,106    $21,720    $24,970
  Cost of goods sold...........................     39,740     43,646     45,066     17,117     19,576
                                                   -------    -------    -------    -------    -------
     Gross margin..............................      8,717     11,199     13,040      4,603      5,394
  Selling, general and administrative
     expenses..................................      6,601      5,515      5,815      1,888      2,472
                                                   -------    -------    -------    -------    -------
     Operating income..........................      2,116      5,684      7,225      2,715      2,922
  Other income (expense):
     Interest income...........................         55         22        242        291        344
     Interest expense..........................       (135)       (43)      (183)       (76)       (61)
     Other income (expense)....................         (3)        41         54         21         53
                                                   -------    -------    -------    -------    -------
     Earnings before income taxes..............      2,033      5,704      7,338      2,951      3,258
     Income tax expense........................         --         --         --         --         --
                                                   -------    -------    -------    -------    -------
          Net earnings.........................    $ 2,033      5,704      7,338      2,951      3,258
                                                   =======    =======    =======    =======    =======
OTHER FINANCIAL DATA:
  EBITDA (a)...................................    $ 2,566    $ 6,147    $ 7,722    $ 2,908    $ 3,122
  Gross profit margin..........................       18.0%      20.4%      22.4%      21.2%      21.6%
  Total depreciation...........................    $   450    $   463    $   497    $   193    $   200
  Capital expenditures.........................      1,758        571      1,419        262        222
BALANCE SHEET DATA (AT END OF PERIOD):
  Total assets.................................    $23,600    $22,144    $25,991    $22,166    $24,076
  Total debt...................................      2,441      1,472      1,422         --         --
  Stockholders' equity.........................      8,161     10,609     13,997     13,049     16,055
</TABLE>
 
- ------------------------------------
(a) EBITDA is defined as operating income before depreciation and amortization.
    While EBITDA is not intended to represent cash flow from operations as
    defined by GAAP and should not be considered as an indicator of operating
    performance or an alternative to cash flow (as measured by GAAP) as a
    measure of liquidity, management believes it provides additional information
    with respect to the ability of a company to meet its future debt service,
    capital expenditures and working capital requirements. The measure of EBITDA
    presented above may not be comparable to similarly titled measures of other
    companies.
 
                                       50
<PAGE>   55
 
               MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                   CONDITION AND RESULTS OF OPERATIONS OF NDC
 
     The following discussion relates to the historical business, financial
condition and results of operations of NDC prior to the consummation of the
Acquisition on June 23, 1998.
 
OVERVIEW
 
     NDC designed, manufactured and sold industrial watertube boilers, waste
heat recovery systems and related components for industrial and commercial
applications. In addition, NDC manufactured standard and customized fabricated
steel products.
 
     Net Sales. Industrial watertube boilers, waste heat recovery systems and
related components accounted for substantially all of NDC's net sales for the
fiscal years ended October 31, 1997, 1996 and 1995, respectively. Less than 10%
of net sales were attributable to other products.
 
     Cost of Goods Sold. The principal elements of NDC's cost of goods sold were
raw materials, component parts, engineering and manufacturing overhead, direct
labor and related start-up and warranty expenses. NDC's major raw materials
varied by plant but included steel, tubes and various manufactured and purchased
component parts. Raw materials and component parts represented approximately 62%
of NDC's total cost of goods sold for fiscal 1997.
 
     NDC's gross margin improved from 18.0% in fiscal 1995 to 22.4% in fiscal
1997. This increase in gross margin was primarily attributed to an increase in
volume at the Gonzales, Texas manufacturing facility, which was acquired in
1995, as well as improved pricing in the industrial watertube and waste heat
recovery product lines.
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expenses declined from 13.6% of net sales in fiscal 1995 to 10.0%
in fiscal 1997 primarily due to a 19.9% increase in sales volume during the
period and associated operating efficiencies.
 
RESULTS OF OPERATIONS
 
     The following table sets forth, for the periods indicated, the percentage
to net sales of certain items included in NDC's statement of earnings.
 
<TABLE>
<CAPTION>
                                                                                          FIVE MONTHS
                                                                 FISCAL YEAR ENDED           ENDED
                                                                    OCTOBER 31,            MARCH 31,
                                                              -----------------------    --------------
                                                              1995     1996     1997     1997     1998
                                                              -----    -----    -----    -----    -----
<S>                                                           <C>      <C>      <C>      <C>      <C>
Net sales...................................................  100.0%   100.0%   100.0%   100.0%   100.0%
Gross margin................................................   18.0     20.4     22.4     21.2     21.6
Selling, general and administrative expenses................   13.6     10.1     10.0      8.7      9.9
                                                              -----    -----    -----    -----    -----
Total operating income......................................    4.4%    10.4%    12.4%    12.5%    11.7%
                                                              =====    =====    =====    =====    =====
</TABLE>
 
FIVE MONTHS ENDED MARCH 31, 1998 COMPARED FIVE MONTHS ENDED MARCH 31, 1997
 
     Net Sales. Net sales increased $3.3 million (15.0%) to $25.0 million in
1998 from $21.7 million in 1997 primarily due to increased volume of waste heat
recovery systems.
 
     Gross Margin. Gross margin increased $0.8 million (17.2%) to $5.4 million
in 1998 compared to $4.6 million in 1997 and improved to 21.6% of net sales from
21.2% in the prior year. This improvement was primarily attributable to a more
favorable product mix as NDC sold more waste heat recovery systems with higher
gross margins.
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expenses increased $0.6 million to $2.5 million in 1998 (9.9% of
net sales) compared to $1.9 million (8.7% of net sales) in 1997.
 
                                       51
<PAGE>   56
 
     Operating Income. Operating income increased to $2.9 million in 1998 from
$2.7 million in 1997 due to the preceding factors.
 
YEAR ENDED OCTOBER 31, 1997 COMPARED TO YEAR ENDED OCTOBER 31, 1996
 
     Net Sales. Net sales increased $3.3 million (5.9%) to $58.1 million from
$54.8 million in 1996 primarily due to volume increases in waste heat recovery
systems and from increased volume of fabricated boiler and waste heat recovery
components, partially offset by a modest decline in industrial watertube boiler
net sales from fiscal 1996's historically strong levels.
 
     Gross Margin. Gross margin increased $1.8 million (16.4%) to $13.0 million
in 1997 from $11.2 million in 1996. As a percentage of net sales, gross margins
improved to 22.4% in 1997 from 20.4% in 1996 primarily due to an improved mix of
product sales, operating leverage associated with NDC's overall increase in net
sales and volume, and modest price increases.
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expenses increased from $5.5 million in 1996 (10.1% of net sales)
to $5.8 million in 1997 (10.0% of net sales), primarily due to the increase in
net sales.
 
     Operating Income. As a result of the foregoing factors, operating income
increased $1.5 million to $7.2 million in 1997 from $5.7 million in 1996.
 
YEAR ENDED OCTOBER 31, 1996 COMPARED TO YEAR ENDED OCTOBER 31, 1995
 
     Net Sales. Net sales increased $6.4 million (13.2%) to $54.8 million in
1996 from $48.5 million in 1995. The increase was primarily due to strong sales
of industrial watertube boilers as the overall market improved, partially offset
by a decline in waste heat recovery volume due to the completion of two large
jobs in 1995. NDC also increased sales of fabricated components to other waste
heat recovery manufacturers in 1996.
 
     Gross Margin. Gross margin increased $2.5 million (28.5%) to $11.2 million
in 1996 compared to $8.7 million in 1995. As a percentage of net sales, gross
margin improved to 20.4% in 1996 from 18.0% in 1995, primarily due to the
increase in net sales and increased utilization of the Gonzales facility.
 
     Selling, General and Administrative Expenses. Selling, general and
administrative expenses declined $1.1 million to $5.5 million in 1996 from $6.6
million in 1995, primarily due to a decline in bad debt expense and salaries,
offset by an increase due to the increase in sales.
 
     Operating Income. As a result of the foregoing factors, operating income
increased $3.6 million (168.6%) to $5.7 million in 1996 from $2.1 million in
1995.
 
YEAR 2000
 
     NDC has assessed and continues to assess the impact of the year 2000 issue
on its operations. Although ultimate costs cannot yet be estimated, management
does not expect to incur significant costs in order to become year 2000
compliant.
 
                                       52
<PAGE>   57
 
                            BUSINESS OF THE COMPANY
 
HISTORY
 
     Founded in 1929 as the John C. Cleaver Company and later known as
Cleaver-Brooks, the Company began as an innovative manufacturer of small,
portable boilers that were packaged and fully assembled. Cleaver-Brooks, which
continues to operate as a division of the Company, eventually became, and for
over 20 years has been, the world's largest manufacturer of commercial and
industrial boilers, burners, related boiler-room equipment and aftermarket
parts. Cleaver-Brooks began manufacturing steam-powered water purification
stills in the early 1940's in response to a military request for a portable
system capable of purifying unfit drinking water. This business, which currently
operates as the Company's Water Technologies division, has become a leading
manufacturer of innovative water treatment products and systems for a variety of
commercial, government, military and industrial applications. The Company
completed the acquisition of substantially all of the assets of NDC on June 23,
1998 and now conducts NDC's former operations through its National Dynamics
Division.
 
BOILER MARKET
 
     Boilers burn a variety of fuels to provide: (i) hot water for residential,
commercial, institutional and industrial uses; (ii) hot water or low-pressure
steam for use in circulatory heating systems; and (iii) process steam for a wide
variety of industrial applications and to drive turbines for the generation of
electricity. The boiler market can generally be segmented according to boiler
capacity and end use. Residential boilers are the smallest, followed by
commercial boilers, industrial boilers, and utility boilers, which are the
largest. Boiler capacities generally are measured in British Thermal Units
("BTU") or boiler horsepower ("BHP") output for smaller boilers, and in pounds
of steam per hour ("PPH") for larger boilers. One BHP equals 33,472 BTU per
hour, which in turn produces approximately 28 to 35 PPH, depending on pressure
and feedwater temperature.
 
     Commercial boilers generally range from 15 BHP (or approximately 500,000
BTU per hour) up to 250 BHP and are used in apartment buildings, hotels, office
buildings, schools, hospitals, and government buildings primarily to provide hot
water or low-pressure steam for circulatory heating systems, and, to a lesser
extent, for potable hot water. Commercial boilers range in price between $15,000
and $50,000.
 
     Industrial boilers, with capacities from approximately 250 BHP to over
250,000 PPH, are larger, more powerful and more expensive than commercial
boilers, and are generally used to provide high-pressure process steam for
industrial applications, such as driving steam-operated presses, mill equipment
or machine tools, sterilizing equipment and products, and processing chemicals,
foods, beverages, and other products. Industrial boilers are used in a broad
range of industries including paper, chemicals, electronics, pharmaceutical,
textiles, automotive, and heavy machinery. Industrial boilers range in price
between $50,000 and $1 million.
 
     Based on industry sources, the annual worldwide market for boilers of all
types is estimated to be in excess of $1 billion, of which approximately $400
million is attributable to the North American commercial and industrial boiler
market.
 
CLEAVER-BROOKS DIVISION
 
     The Company's Cleaver-Brooks Division ("Cleaver-Brooks") is the world's
largest manufacturer of commercial and industrial boilers. It has an estimated
installed base of approximately 80,000 boilers that remain in use and believes
it has the #1 or #2 market position in each of its principal product lines. The
division's products include firetube and watertube boilers, burners, and
combustion and emission controls, boiler room accessories, and aftermarket
parts. Management believes that Cleaver-Brooks' reputation for providing
high-quality, energy-efficient, low-emission boilers and ancillary equipment
with a demonstrated record of safety and durability often enables it to command
a premium price for its products from its diverse customer base. Cleaver-Brooks
accounted for approximately 81% ($154.9 million) of Aqua-Chem's net sales, and
an even higher percentage of EBITDA, for the twelve months ended December 31,
1997.
 
                                       53
<PAGE>   58
 
     PRODUCTS
 
     Cleaver-Brooks manufactures two types of boilers, firetube and watertube,
for commercial and industrial applications. Most Cleaver-Brooks boilers can
operate on multiple fuel options using both natural gas and fuel oil.
Cleaver-Brooks primarily manufactures "packaged" boilers, which are shipped
fully assembled and require minimum on-site installation, and also manufactures
a limited number of boilers that are designed to be "field-erected" at the
customer's facility. The high-quality boilers manufactured by Cleaver-Brooks
generally have a useful life of 20 years or more, depending upon use and
maintenance.
 
     FIRETUBE BOILERS. Firetube boilers heat water or produce steam by directing
hot gas from the combustion process through tubes which are submerged in a
chamber of water inside the boiler. Heat is transferred from the hot gas in the
tube through the tube walls to the water.
 
     Cleaver-Brooks offers the industry's broadest line of firetube boilers,
which are generally used in low- and high-pressure industrial applications, and
to produce heat and hot water for large commercial and institutional buildings.
Cleaver-Brooks firetube boilers range in capacity from 15 to 800 BHP. Although
each Cleaver-Brooks firetube boiler is manufactured to specific customer
requirements, each is based on relatively standardized pressure vessel sizes and
other basic components. The prices of Cleaver-Brooks firetube boilers range from
approximately $25,000 to $150,000. Firetube boilers represented approximately
$68 million, or 44%, of Cleaver-Brooks' net sales for the twelve months ended
December 31, 1997.
 
     Cleaver-Brooks firetube boilers are highly regarded for their quality,
efficiency, safety, design simplicity, and ease of operation and maintenance, as
well as their long product life and low emission levels. High efficiency is
often the primary criterion in selecting a boiler as annual fuel costs can
greatly exceed a boiler's purchase price. Because a $50,000 boiler system could
consume over $150,000 per year in fuel, a slight increase in boiler efficiency
can translate into substantial annual savings. Cleaver-Brooks boilers are
designed to operate efficiently to reduce customers' fuel costs. They include
what Aqua-Chem believes to be the world's highest efficiency "four-pass" design
and maintain high gas velocity which provides maximum heat transfer. They also
utilize a single tube sheet design that maintains consistent temperatures for
maximum operating life. Aqua-Chem believes that these factors provide it with a
competitive advantage in the firetube boiler market.
 
     WATERTUBE BOILERS. Watertube boilers produce hot water or steam by
directing water through tubes installed in a chamber filled with hot gas from
the combustion process. This fundamental difference between the firetube and
watertube process allows watertube boilers to be designed with greater capacity
and makes watertube boilers more suitable for certain large, multi-step
industrial applications than firetube boilers. Cleaver-Brooks produces watertube
boilers in a range of models and capacities. Like its firetube boilers,
Cleaver-Brooks watertube boilers are manufactured for maximum efficiency and
ease of maintenance and are purchased by both industrial and commercial
end-users.
 
     Cleaver-Brooks commercial watertube boilers range in capacity from 15 to
250 BHP, which is comparable to its smaller capacity firetube boilers, and
include flexible watertube boilers designed to simplify installation,
maintenance and tube replacement. The division's flexible watertube boilers
minimize potential thermalshock damage due to temperature fluctuation, an
especially important consideration with hot water applications.
 
     Cleaver-Brooks manufactures industrial watertube boilers of only the "D"
design (so named because the watertubes inside the boiler are shaped in the
configuration of the letter "D"), which is preferred by manufacturers for most
industrial applications. Cleaver-Brooks industrial watertube boilers range in
capacity from 40,000 to 140,000 PPH (the approximate equivalent of 1,400 to
4,000 BHP).
 
     Cleaver-Brooks watertube boilers range in price from approximately $25,000
to $500,000. Watertube boilers represented approximately $25 million (16%) of
the division's net sales for the twelve months ended December 31, 1997.
 
     BURNERS. Cleaver-Brooks is a leading supplier of highly-engineered, single
and multi-fuel engineered burners. These burners are installed as original
equipment on certain Cleaver-Brooks product lines, as a retrofit
 
                                       54
<PAGE>   59
 
to existing boilers where an upgraded or new burner is required, or, under the
Industrial Combustion brand name, on new boilers manufactured by competitors.
Cleaver-Brooks manufactures a broad range of burners that give customers the
flexibility to burn most liquid and gaseous fuels in use today. The Industrial
Combustion product line has an exceptionally strong market position
(approximately 86%) for heavy oil burners and is increasing its share of the gas
burner market. It was instrumental in originating the conversion burner business
and pioneered air atomizing and fuel metering technologies for using heavy fuel
oil.
 
     BOILER ROOM ACCESSORIES. Cleaver-Brooks also offers a wide range of boiler
room accessories, most of which are used to ensure that corrosive gases and
impurities found in water do not seriously affect boiler performance. This
equipment includes deaerators, water softeners, boiler feed water systems and
chemical feed systems. Other boiler room accessories regulate the flow of water
to and from the boiler.
 
     AFTERMARKET PARTS. Taking advantage of its industry-leading installed base
of approximately 80,000 boilers, Cleaver-Brooks offers over 15,000 aftermarket
parts for its own and other manufacturers' boilers through its computerized
immediate access system. The immediate access system electronically links
Cleaver-Brooks' sales representatives and provides information regarding parts
availability, price lists and lead time. Cleaver-Brooks' sales representatives
and distributors stock Cleaver-Brooks parts inventory on a worldwide basis.
Aftermarket parts, which generally carry higher gross margins than new boilers,
represented approximately $31 million (20%) of Cleaver-Brooks' net sales for the
twelve months ended December 31, 1997. As part of several strategic initiatives,
management is emphasizing further penetration of the aftermarket parts business
through additional training and support of its extensive sales representative
network.
 
     Aftermarket products sold by Cleaver-Brooks include a wide range of
combustion and emission controls that generally enhance boiler performance or
safety, including low nitrous oxide ("NO(X)") emissions packages, conversion or
replacement burners, boiler control management systems, high turndown burners,
oxygen trim systems, and flame safeguard controls. For example, Cleaver-Brooks'
industry-leading low NO(X) emissions packages are guaranteed to as low as 20
parts per million ("ppm") of NO(X) levels and are extremely effective at
maintaining system efficiency levels. The majority of these parts are offered as
options to a boiler package.
 
     Although boilers generally have a useful life of up to 20 years, certain
boiler parts are subject to wear and require periodic replacement. These parts
consist primarily of combustion-oriented components such as burners,
burner-safety components, and emissions controls, but also include certain
water-bearing components. The need for aftermarket parts is a function of the
level of use to which a boiler is subjected. Boilers that "cycle" (turn on and
off) more frequently tend to wear more quickly. In addition, oil-burning
components tend to wear more quickly than natural gas-burning components.
Water-bearing components of a boiler can wear more quickly if the end-user does
not properly treat the water used in the boiler to reduce corrosive gases and
impurities that accumulate in untreated water.
 
     Commercial boiler wear can also be affected by cold weather, when a boiler
is more likely to cycle more frequently. Many Cleaver-Brooks boilers are
equipped with multi-fuel options and can readily be switched by the end-user
from one fuel to the other. In many locations, boilers are required by law to
switch from burning natural gas to oil during extended periods of cold weather,
when demand for natural gas for residential and commercial forced-air heating is
high and available gas pressure is reduced. Industrial applications can also
involve high-cycle use, causing boilers to wear more quickly. Inadequate
maintenance practices can also affect boiler wear.
 
     In addition, the demand for aftermarket parts generally increases during
periods of economic difficulty when many businesses elect to defer the purchase
of new boilers in favor of repairing or retrofitting existing boilers. Aqua-Chem
believes that this phenomenon partially offsets the reduced demand for new
boilers during such periods.
 
     COMMITMENT TO QUALITY
 
     Cleaver-Brooks has received numerous industry and quality awards, including
the State of Wisconsin's 1995 Governor's New Product Award. Several of the
division's products have been recognized by the
 
                                       55
<PAGE>   60
 
Wisconsin Society of Professional Engineers and the Model CB-LE was among a
select group of winners in a statewide competition which singled out new product
innovations in large, medium and small business segments. Additionally, with the
introduction of its low nitrous oxide (NO(X)) emissions product in the late
1980's, Aqua-Chem was recognized by the South Coast Air Quality Management
District as the first boiler manufacturer to meet Southern California's
stringent emissions standards, as well as by the New York Bureau of Air
Research.
 
     SALES, MARKETING AND CUSTOMERS
 
     Cleaver-Brooks maintains strong relationships with its worldwide network of
sales and service representatives, which management believes to be the most
extensive global distribution network for commercial and industrial boilers.
Cleaver-Brooks sells boilers through 50 domestic sales representatives located
throughout North America and 43 international sales representatives located in
Eastern Europe, Asia, Australia, Central and South America, and the Middle East.
These sales representatives have sold Cleaver-Brooks products for an average of
more than 25 years, and, pursuant to agreements with the Company, do not sell
products that compete directly with Cleaver-Brooks. No sales representative
accounted for more than approximately 5% of Cleaver-Brooks' net sales in the
twelve months ended December 31, 1997.
 
     Cleaver-Brooks' sales representatives primarily offer on-demand service and
parts support to consulting engineers, contractors and end-users, as well as
offering multi-year service contracts for boiler parts and accessories.
Additionally, as is customary in the industry, sales representatives provide
on-site start-up assistance and personnel training by factory-qualified
specialists and preventive maintenance programs as part of the range of services
available to keep boiler and pretreatment equipment operating at peak
performance.
 
     Cleaver-Brooks sells boilers to a diverse customer base in a broad range of
industries, with no significant customer concentration. Although Cleaver-Brooks'
customers vary from year to year, management believes that a substantial portion
of annual net sales are generally to repeat customers. Recent customers include
Ford, Cargill, Coca-Cola, Weyerhaeuser, Anheuser-Busch, Baxter Healthcare,
Ralston-Purina, Hewlett-Packard, Georgia Pacific, Chrysler-Jeep, Wrigley,
Sheraton, IBM, and NASA. For a further discussion of sales by geographic area,
see Note 15 to the Company's Consolidated Financial Statements contained
elsewhere in this Prospectus.
 
     RAW MATERIALS AND SUPPLIERS
 
     Cleaver-Brooks' primary raw materials include steel plate and coil steel.
The division also purchases finished components for its products, such as
burners, tubes, controls, insulation, refractory materials, valves, gauges and
pumps. Cleaver-Brooks maintains one-year supply agreements with its steel
suppliers. These arrangements generally specify volume and price, but are
cancelable at any time by either party. For raw materials not covered by supply
agreements, Cleaver-Brooks generally chooses a particular supplier based on
market conditions, availability and pricing. Cleaver-Brooks works closely with
its major suppliers and is not dependent on any single supplier for any of its
raw material or component needs. Cleaver-Brooks is currently implementing new
purchasing procedures to reduce material costs, including consolidation of its
suppliers.
 
     MANUFACTURING
 
     Cleaver-Brooks operates through five manufacturing facilities located in
Stratford, Ontario, Canada; Thomasville, Georgia; Monroe, Wisconsin; Mexico
City, Mexico and Greenville, Mississippi (however, the Company plans to close
its Greenville facility and transfer production to certain other facilities).
Additionally, Cleaver-Brooks conducts applied engineering and product
development activities at a Milwaukee, Wisconsin location, which is shared with
Water Technologies. See "-- Properties and Employees."
 
     The Company has intensified its efforts to develop world-class
manufacturing facilities. Beginning in 1995, Aqua-Chem closed its Lebanon,
Pennsylvania facility, and consolidated its large firetube boiler production in
its Thomasville facility, and its smaller firetube boiler production in its
Stratford facility. These consolidations reduced labor and overhead costs by up
to one-third and took advantage of certain economies of scale in each facility.
In addition, the Company has been engaged in a program to improve its
manufacturing processes by adopting cellular manufacturing techniques,
just-in-time inventory controls and demand flow
 
                                       56
<PAGE>   61
 
processing. These initiatives have minimized scrap, identified manufacturing
inefficiencies, significantly reduced manufacturing cycle times and have already
improved manufacturing efficiency and inventory management at the Thomasville
facility. Aqua-Chem expects to implement similar cost reduction initiatives and
manufacturing improvements at its other facilities. Aqua-Chem has also
established an internal manufacturing council to address ongoing process
improvements, share best practices and instill a broad base of manufacturing
expertise throughout the organization.
 
NATIONAL DYNAMICS DIVISION
 
     The Company's National Dynamics Division ("National Dynamics") consists of
the former operations of NDC which were acquired by Aqua-Chem on June 23, 1998.
All references to historical data of NDC, and the term "NDC," refer to the
National Dynamics Division's operations under the ownership of NDC.
 
     PRODUCTS
 
     National Dynamics primarily designs and manufactures industrial watertube
boilers, waste heat recovery systems, and related accessories, as well as a
variety of standard and customized fabricated steel components, such as ductwork
and stacks, which are insourced for use in National Dynamics' products and
produced on a contract basis for other waste heat recovery systems
manufacturers. For the year ended October 31, 1997, NDC's net sales of
industrial watertube boilers and waste heat recovery systems, including related
accessories and components, represented approximately 90% of NDC's net sales.
 
     INDUSTRIAL WATERTUBE BOILERS. National Dynamics produces shop-assembled
industrial watertube boilers, components and other boiler accessories under the
Nebraska Boiler brand-name, chiefly for industrial and institutional
applications. The Nebraska Boiler product line consists primarily of industrial
watertube boilers with larger capacities than those manufactured by
Cleaver-Brooks. Although National Dynamics manufactures industrial watertube
boilers with capacities as low as 7,000 PPH, its primary focus is on large
industrial watertube boilers that range in capacity from 100,000 to 250,000 PPH.
In contrast, Cleaver-Brooks focuses on commercial and industrial watertube
boilers with capacities under 100,000 PPH. The Nebraska Boiler product line also
includes industrial watertube boilers that are capable of producing steam at
much higher temperatures and pressures than those manufactured by
Cleaver-Brooks. NDC manufactured approximately 80 to 90 industrial watertube
boilers per year, which typically ranged in price from approximately $150,000 to
$1 million each.
 
     National Dynamics' primary unit is the "D" design watertube boiler, which
accounted for approximately 72% of NDC's boiler sales in fiscal 1997. Nebraska
Boiler industrial watertube boilers generally utilize the "membrane" tube
design, in contrast to Cleaver-Brooks boilers, which utilize the "tangent" tube
design, each of which is preferred by certain end users for various reasons.
National Dynamics is also one of the few boiler manufacturers that produces "O"
and "A" design boilers in addition to the "D" design. Although the "D" design is
preferred for most industrial applications, the symmetrically designed "O" and
"A" boilers are more readily transportable and better suited for certain uses.
"O" design boilers in particular are compact, fully assembled, easily
transported by truck, and for these reasons are considered ideal for use as
"rental" boilers (boilers installed temporarily to provide supplemental, backup
or replacement service). "A" design boilers typically are designed to have
greater capacity than the "O" or "D" designs and can be designed to burn a
variety of alternative fuels (such as coal, wood and saw dust). "O" and "A"
design boilers accounted for approximately 8% and 20%, respectively, of NDC's
boiler sales in fiscal 1997.
 
     National Dynamics also manufactures industrial watertube boiler components
and accessories, such as ducts, stacks, superheaters (an integral unit in the
boiler that heats the steam produced by the boiler to temperatures in excess of
750 degreesF for particular industrial applications) and economizers (an
integral or add-on unit that captures the heated air and flue gases vented from
the boiler's combustion chamber and uses them to preheat water entering the
boiler to conserve energy).
 
     WASTE HEAT RECOVERY SYSTEMS. National Dynamics designs and produces a
variety of packaged, modular and field-erected waste heat recovery systems under
the Energy Recovery International or "ERI" brand-name.
                                       57
<PAGE>   62
 
The general principle behind these systems is that the waste heat generated by a
turbine or industrial process can be recaptured and directed into a pressure
vessel (resembling a burnerless boiler) to generate hot water or steam, which
can in turn be used to drive a turbine to generate electricity (a process
referred to as "co-generation") or for other industrial applications.
Co-generated electric power may be used internally; however, if it is generated
at levels in excess of internal need, which is often the case, the excess
electricity is generally sold to the local power company, which has been made
possible through the deregulation of the domestic electrical power industry over
the last few years. For certain applications, waste heat recovery systems can
also be designed to operate with a supplemental heat source, such as a duct
burner, that raises the temperature and pressure to levels comparable with
conventional boilers.
 
     NDC's sales of ERI products grew rapidly in the last few years and the
Company expects that such growth will continue due to increased demand for
energy efficient and environmentally conscious power projects, as well as
increased deregulation. Waste heat recovery systems are increasingly popular
because they provide an alternative source of power at significantly reduced
fuel cost.
 
     National Dynamics offers complete system design and service, based on the
customer's specific needs and requirements. In particular, waste heat recovery
systems are generally custom-designed for integration with the individual
customer's facility and equipment at the time of construction. NDC manufactured
approximately 15 to 20 waste heat recovery systems per year.
 
     SALES, MARKETING AND CUSTOMERS
 
     National Dynamics markets its products primarily on the basis of quality,
dependability and custom engineering, which is complemented by the longstanding
working relationships NDC developed with customers and premier engineering
firms. National Dynamics products are marketed worldwide through its 46 sales
representatives and distributors, most of whom sell both Nebraska Boiler and ERI
products. No sales representative accounted for more than approximately 11% of
NDC's net sales for the year ended October 31, 1997. For the year ended October
31, 1996, one customer, Thai Petrochemical, accounted for more than 10% of NDC's
net sales.
 
     National Dynamics sells its products to a diverse customer base in a broad
range of industries, with no significant customer concentration. Recent NDC
customers included Anheuser-Busch, Warner-Lambert, Bristol-Myers, General
Motors, Westinghouse, and Cargill, as well as engineering firms such as
Fluor-Daniels, Bechtel, Black & Veach, and Day and Zimmerman.
 
     RAW MATERIALS AND SUPPLIERS
 
     National Dynamics' primary raw material is steel, and it also purchases
finished components for its products, such as burners, tubes, controls,
insulation, refractory materials, valves, gauges and pumps. National Dynamics is
not dependent on any single supplier for any of its raw material or component
needs.
 
     MANUFACTURING
 
     National Dynamics operates three manufacturing facilities, two of which are
located in Lincoln, Nebraska and one of which is located in Gonzales, Texas. See
"-- Properties and Employees."
 
WATER TECHNOLOGIES DIVISION
 
     With over 50 years of experience, Water Technologies is a world leader in
the design and production of water purification and treatment products, systems,
aftermarket parts and service for selected commercial, government, military and
industrial applications. Water Technologies, which markets and sells its
products under the Aqua-Chem brand name, has two product categories: (i)
Freshwater and Military Products, which consist of products with relatively
standard components and configurations that are generally sold to customers in
the military, bottled water and pharmaceutical markets; and (ii) Seawater and
Process Systems, which consist primarily of large, highly engineered projects
and products that generally are sold to customers in markets for seawater
desalination and industrial evaporation processes. Water Technologies accounted
for
 
                                       58
<PAGE>   63
 
approximately 19% ($36.3 million) of Aqua-Chem's net sales for the twelve months
ended December 31, 1997.
 
     PRODUCTS AND SERVICES
 
     Water Technologies manufactures products that utilize evaporation and
filtration technologies to create purified water for use in a variety of
applications. Water Technologies' primary products are thermal distillation
units, which convert seawater or contaminated fresh water into clean water for
drinking and manufacturing processes by passing feedwater over a heated surface
to create steam that is then condensed as distillate. Water Technologies also
offers reverse osmosis units, which pressurize contaminated fresh or salt water
to force it through a semipermeable membrane to produce drinking water.
 
     FRESHWATER AND MILITARY PRODUCTS. Freshwater and Military Products are
primarily pre-engineered water purification and treatment products and systems
for the bottled water and pharmaceutical industries and for the military. Water
Technologies also provides services and replacement parts for its Freshwater and
Military Products. Most Freshwater and Military Products are various types of
thermal distillation units, including an all-electric thermal distillation unit
that is installed on all U.S. Navy Trident submarines. Aqua-Chem believes that
every U.S. aircraft carrier and nuclear submarine utilizes Water Technologies
products to purify water for use by onboard personnel. Water Technologies also
manufactures a reverse osmosis unit marketed under the "ROWPU" (Reverse Osmosis
Water Purification Unit) name that is sold primarily to the U.S. military.
Freshwater and Military Products also include heat exchangers, which are used by
food, chemical and other industries to cool liquids. For example, the U.S. Navy
uses Water Technologies' heat exchangers for seawater cooling of nuclear reactor
waste water and feedwater preheating in steam propulsion plants of nuclear
aircraft carriers. Freshwater and Military water purification units and heat
exchangers generally sell for between $100,000 and $500,000.
 
     Although individual units may be adapted to meet unique customer
specifications, Water Technologies manufactures all Freshwater and Military
Products to basic design parameters at its Knoxville, Tennessee facility.
Freshwater and Military Products are shipped from the Knoxville facility to the
customer as fully-manufactured systems that require a minimum number of piping
and electrical connections for installation. Once installed, the unit is ready
for operation.
 
     SEAWATER AND PROCESS SYSTEMS. Seawater and Process Systems are highly
engineered systems for land-based and offshore desalination and manufacturing
process plants. Water Technologies utilizes a number of thermal distillation
technologies to meet the specific needs of its Seawater and Process Systems
customers. Water Technologies offers both single effect systems, which are
low-cost and simple to operate, and multi-effect systems, which conserve energy
by linking two, three or more evaporators in series and, as a result, are more
popular for industrial applications. For example, Water Technologies has
installed a 10 million gallon per day seawater desalination system which
produces the entire fresh water supply for the Caribbean island of Aruba.
Seawater and Process Systems include thermal distillation units used by the pulp
and paper industry to concentrate heavy scaling sulfite pulping liquors. Water
Technologies also offers reverse osmosis units for industrial applications.
 
     Many Seawater and Process Systems component parts are fabricated, assembled
and hydro-tested at the Knoxville facility prior to shipment to the customer's
job site, where they are assembled into a field erected plant. Seawater and
Process Systems are highly project oriented, may take from 10 to 14 months to
complete, and are contracted on a fixed-price basis, typically ranging between
$1 million and $10 million in installed value.
 
     SALES, MARKETING AND CUSTOMERS
 
     Water Technologies utilizes a network of over 40 representatives,
distributors and licensees worldwide to sell and market its Freshwater and
Military Products. Sales representatives are compensated on a commission-only
basis, while distributors typically make a profit margin on the purchase and
resale of Water Technologies parts. Due to the unique engineering considerations
and the magnitude of the projects, most Seawater and Process Systems are sold by
Water Technologies directly to end-users.
                                       59
<PAGE>   64
 
     For the twelve months ended December 31, 1997, Water Technologies had
approximately 325 customers worldwide, with no one customer representing more
than 10% of its gross sales. Water Technologies' leading customers generally
vary from year to year, due in part to the project-oriented nature of many of
its Seawater and Process Systems. Recent customers include Arvind Mills, the
Aruba Water and Energy Authority, and Newport News Shipbuilding. International
customers represented approximately 50% of Water Technologies' sales over the
last three years, with revenues generated from over 35 countries. Payment terms
on international sales are typically denominated in U.S. dollars and satisfied
via letters of credit.
 
     Typically, over half of Water Technologies' annual revenue is based upon
fixed-priced, long-term contracts. Generally, the term of the contract for
Freshwater and Military Products extends from the order date through shipment,
which usually ranges from 4 to 12 months. A start-up or test period may follow
shipment and last for 1 to 3 months. Customers are generally billed at the time
of shipment. Contract terms for Seawater and Process Systems may vary between 10
and 14 months. Seawater and Process Systems are contracted on a fixed-priced
basis, and customers are billed for work performed according to a pre-arranged
schedule detailed in the sales contract. For a further discussion of sales by
geographic area, see Note 15 to the Company's Consolidated Financial Statements
contained elsewhere in this Prospectus.
 
     PRODUCT SERVICE AND SUPPORT
 
     Water Technologies supports its products with a staff of engineers and
service specialists who provide parts, service, technical training, service
publications, overhaul and repair for customers around the world. For instance,
Water Technologies provides qualified technical training anywhere in the world
through a team of training specialists who work closely with customers to
develop productive and dependable operators for all equipment.
 
     When service is needed, Water Technologies dispatches a qualified service
representative who assesses the customer's system and its repair requirements.
To meet customer needs quickly, Water Technologies distributors maintain
authorized parts and service centers across the continental United States, as
well as service centers in Alaska, Canada, South America, Northern Europe,
Southeast Asia, the Middle East and India.
 
     RAW MATERIALS AND SUPPLIERS
 
     Water Technologies utilizes a wide variety of raw materials in the
construction of its products, including copper-nickel, alloys, stainless steel,
electrical control systems and a number of plastic and metal component parts.
Water Technologies maintains relationships with a select group of suppliers to
leverage its purchasing power and may enter into purchasing agreements to ensure
a reliable source of materials. Water Technologies has never experienced a
significant shortage of raw materials.
 
     MANUFACTURING
 
     Water Technologies' primary production facility is located in Knoxville,
Tennessee. The Knoxville plant, an ISO 9001 certified facility, provides
fabrication, machining, welding and assembly work for the production of both
Freshwater and Military Products and the component parts of Seawater and Process
Systems. Units are tested at the Knoxville plant prior to shipment to the
customer's site for installation. The division is currently implementing
cellular manufacturing techniques, just-in-time inventory controls and
demand-flow processing to improve manufacturing efficiency and reduce production
costs.
 
     The Seawater and Process Systems business also utilizes subcontract
manufacturers in connection with international contracts when Aqua-Chem believes
that it provides a competitive advantage. To implement this international
subcontracting strategy, Water Technologies employs pre-qualified subcontractors
and project managers who are responsible for ensuring that quality, schedule and
other specifications of its Seawater and Process Systems contracts are met.
These project managers are supported by engineers who specialize in the
erection, commissioning, performance testing and overall service and
troubleshooting of the systems.
 
                                       60
<PAGE>   65
 
     Water Technologies shares an applied engineering and product development
facility with Cleaver-Brooks for evaluating the practical application of
evaporator technology on a broad range of processing needs. This capability is
an important part of Water Technologies' operations, enabling it to test the
performance and cost effectiveness of the systems it offers.
 
PROPERTIES AND EMPLOYEES
 
     The following table sets forth certain information regarding the Company's
properties and employees as of September 30, 1998:
 
<TABLE>
<CAPTION>
                                                                                                    APPROXIMATE
                                                                        APPROXIMATE                  NUMBER OF
                                                                          SQUARE                    EMPLOYEES AT
       FACILITY LOCATION                         USAGE                    FOOTAGE      OWNERSHIP      FACILITY
- -------------------------------    ---------------------------------    -----------    ---------    ------------
<S>                                <C>                                  <C>            <C>          <C>
Milwaukee, Wisconsin...........    Aqua-Chem, Inc.                         81,000      Leased (a)        238
                                   Corporate Headquarters
Milwaukee, Wisconsin...........    Cleaver-Brooks and Water                27,000       Owned              9
                                   Technologies
                                   Product Development and Design
Greenville, Mississippi........    Cleaver-Brooks                          88,000      Leased (b)        149(b)
                                   Manufacturing (Commercial and
                                   Industrial Watertube Boilers)
Stratford, Ontario, Canada.....    Cleaver-Brooks of Canada, Ltd.          74,000       Owned            104(c)
                                   Manufacturing (Firetube and
                                   Commercial Watertube Boilers)
Mexico City, Mexico............    Cleaver-Brooks de Mexico                40,000       Owned             47(c)
                                   Manufacturing (Miscellaneous
                                   Parts and Components)
Thomasville, Georgia...........    Cleaver-Brooks                         185,000       Owned            242
                                   Manufacturing (Firetube Boilers)
Knoxville, Tennessee...........    Water Technologies                     162,000       Owned            153
                                   Manufacturing
Monroe, Wisconsin..............    Cleaver-Brooks                          81,000       Owned            100(c)
                                   Manufacturing (Burners and
                                   Combustion and Emissions
                                   Controls)
Lincoln, Nebraska..............    National Dynamics                      150,000       Owned            207(c)
                                   Manufacturing (Industrial
                                   Watertube Boilers, Waste Heat
                                   Recovery Systems)
Lincoln, Nebraska..............    National Dynamics                       50,000       Owned             55
                                   Manufacturing (Fabricated Steel
                                   Components)
Gonzales, Texas................    National Dynamics                       75,000       Owned             92
                                   Manufacturing (Industrial
                                   Watertube Boilers, Waste Heat
                                   Recovery Systems and Fabricated
                                   Steel Products)
Elk Grove Village, Illinois....    CB-Kramer Sales & Service, Inc.         46,000      Leased (d)         32
                                   Sales, Service, Warehouse
Lebanon, Pennsylvania..........    (e)                                    164,000       Owned (e)         --(e)
                                                                                                       -----
                                                                                       Total:          1,428
</TABLE>
 
- ------------------
(a) The Company was formerly a limited partner in a partnership that owned this
    facility. In July 1998 the partnership sold this facility to a third party
    and the partnership was liquidated. The Company occupies the facility under
    a lease which expires in June 2006.
 
                                       61
<PAGE>   66
 
(b) The Company plans to close the Greenville facility and transfer all
    production currently located there to other Company facilities. The process
    of transferring production is expected to be completed, and the Greenville
    facility closed within approximately one year. The Company has entered into
    an agreement with the union representing production workers at the
    Greenville facility regarding the transfer of production and closure of that
    facility. The Company occupies this facility under a year to year lease
    which automatically renews until 2061 unless terminated by either party upon
    six months' notice.
 
(c) As of September 30, 1998, approximately 30% of the Company's employees were
    represented by various unions. The Company's agreements with its unions
    expire on January 1, 1999 in Mexico City, Mexico; on June 5, 2000 in
    Stratford, Ontario; on January 19, 2001 in Monroe, Wisconsin and on November
    1, 1999 in Lincoln, Nebraska. The Company has not experienced any strikes or
    work stoppages in the past five years, except that in 1994, the employees
    represented by the International Boilermakers Union at NDC's main
    manufacturing facility in Lincoln went on strike for approximately six weeks
    in connection with a dispute over employee contributions for health
    benefits. See "Risk Factors -- Labor Relations."
 
(d) The Company occupies this facility under a lease which expires in November
    1999.
 
(e) The Company's Lebanon, Pennsylvania facility, a 164,000 square foot
    manufacturing plant, is currently partially leased to third parties and is
    held for sale.
 
ENVIRONMENTAL AND RELATED MATTERS
 
     The Company is subject to a variety of foreign, federal, state and local
laws and regulations relating to the use, storage, handling, generation,
transportation, treatment, emission, discharge, disposal and remediation of, and
exposure to, hazardous and non-hazardous substances, materials, and wastes
("Environmental Laws"). The Company is also subject to laws and regulations
governing employee health and safety.
 
     Under certain Environmental Laws, the Company could be held strictly,
jointly and severally liable for the investigation and remediation of hazardous
substances, materials or wastes at currently or formerly owned or operated
properties, or at third-party waste disposal sites. In addition, the Company
could be held responsible for third-party property or personal injury claims
relating to such contamination or for other violations of Environmental Laws.
The Company has, in some cases, agreed to indemnify the owners of properties
formerly owned by the Company for liabilities under Environmental Laws with
respect to such properties and could be held liable for environmental conditions
which arose while these properties were owned by the Company regardless of such
indemnification. The Company has discovered environmental conditions at a number
of on-site locations that may require additional action, investigation and/or
remediation for which the Company, alone or with others, is or may be
responsible. The Company also has been identified as a responsible party at one
off-site disposal location. Although the Company does not believe that the
aggregate future costs associated with these matters will have a material
adverse effect on its business, results of operations or financial condition,
the amount of such costs in any one year could be substantial.
 
     Certain Environmental Laws impose stringent permitting, operating,
reporting, and other compliance obligations on the Company's operations,
particularly with respect to air and wastewater emissions and to hazardous
substance management and disposal. Failure to comply with such Environmental
Laws could result in substantial fines or penalties, costly corrective action
requirements or operational changes, stringent monitoring or reporting
requirements, and, in certain instances, cessation of operations. The Company is
presently evaluating and addressing various environmental conditions at certain
of its facilities, including the potential that air permits will be required at
certain of its facilities. Although the Company believes that there are no
instances of non-compliance with Environmental Laws that would require it to
incur material costs, there can be no assurance that additional environmental
issues will not arise, either with respect to the Company's existing or formerly
owned facilities, which could have a material adverse effect on the Company's
business, results of operations, or financial condition.
 
LEGAL PROCEEDINGS
 
     The Company has been named as one of a number of defendants in
approximately 6,400 lawsuits (of which approximately 4,100 are still pending)
alleging personal injury arising from exposure to asbestos-
 
                                       62
<PAGE>   67
 
containing materials allegedly contained in certain boilers manufactured by the
Company or its subsidiaries in the past. The Company believes that substantially
all of these lawsuits are without merit and has not admitted liability or been
found liable for the plaintiff's injuries in any of these cases. The Company has
disposed of the vast majority of the closed cases without any payment whatsoever
by the Company or its insurers to the plaintiffs in those cases, and is
vigorously defending the open cases, although many may not be resolved for
several years. Because the pleadings generally do not specify the amount of
damages sought when they are initially filed, and because the Company is
typically only one of numerous defendants initially named and it is impossible
to determine the Company's proportionate share of liability, if any, to the
plaintiffs, the Company cannot calculate its total potential liability in these
cases. However, based on its historical experience, the Company believes that it
has adequate indemnity as well as insurance coverage from a number of different
insurance carriers for any potential liability it may face as a result of such
claims, although it has agreed to bear a portion of the defense costs and
indemnity payments with regard to a number of these suits. The Company has
established a reserve on its balance sheet to cover any such exposure and
believes this reserve to be adequate. It is the view of management that the
final resolution of said claims and other similar claims which are likely to
arise in the future will not individually or in the aggregate have a material
effect on the Company's financial position or results of operations, although no
assurance to that effect can be given. See "Risk Factors -- Product Liability
Litigation."
 
     The Company is involved in various other litigation matters arising in the
normal course of business. It is the view of management that the Company's
recovery or liability, if any, under pending litigation is not expected to have
a material effect on the Company's financial position or results of operations,
although no assurance to that effect can be given.
 
PATENTS, TRADEMARKS AND COPYRIGHTS
 
     The Company has a number of United States and foreign patents, patent
applications, patent licensing agreements, trademarks, trademark applications
and copyrights. The Company does not consider its business to be materially
dependent upon any patent, patent application, patent license agreement,
trademark, trademark application or copyright.
 
                                       63
<PAGE>   68
 
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS OF AQUA-CHEM
 
     The following table sets forth certain information concerning the directors
and executive officers of the Company. Each director is elected for a one year
term or until such person's successor is duly elected and qualified. The
Company's by-laws provide for six directors; the Board is currently comprised of
five directors and there is one vacancy on the Board to be designated by
Management (as defined).
 
<TABLE>
<CAPTION>
                NAME                     AGE                            POSITION
- -------------------------------------    ---    --------------------------------------------------------
<S>                                      <C>    <C>
Jeffrey A. Miller....................    48     President, Chief Executive Officer and Director
                                                (Chairman of the Board)
J. Scott Barton......................    49     Vice President, Chief Financial Officer
James A. Feddersen...................    54     Secretary
James H. Fordyce.....................    39     Director
James W. Hook........................    61     Director
Daniel J. Johnson....................    48     President-Water Technologies Division
William P. Killian...................    62     Director
Charles J. Norris....................    51     Vice President, Chief Information Officer
Michael R. Stone.....................    35     Director
Daniel B. Teich......................    51     Division President, National Dynamics
Ronald G. Thimm......................    42     Treasurer
</TABLE>
 
     Jeffrey A. Miller has served as President and Chief Executive Officer of
the Company since July 1996 and assumed the role of Chairman of the Board in
August, 1997. In addition to these duties, Mr. Miller is currently managing the
Cleaver-Brooks Division on an interim basis until the Company selects an
individual to fill the newly created position of President of the Cleaver-Brooks
Division, which will replace the position held by the Company's former Executive
Vice President and General Manager-Cleaver-Brooks, who resigned on November 17,
1998. Prior to joining the Company, Mr. Miller had undertaken permanent and
interim Chief Executive Officer and Chief Operating Officer assignments for
various major industrial companies, including serving as interim President and
Chief Operating Officer of Donnelly Corporation (an automotive supplier) from
October, 1995 to May, 1996, performing various independent consulting and
interim management positions from June, 1993 to October, 1995, and serving as
Group Vice President of the Automotive Products Group of Aeroquip Corporation
(an automotive supplier) from August, 1992 to June, 1993. Mr. Miller also spent
19 years in numerous managerial and executive positions within various business
groups of The General Electric Company, including transportation systems
(locomotives, transit cars, transit equipment), major appliances, mining, oil
well drilling, industrial electronics, industrial controls, factory automation
and automotive.
 
     J. Scott Barton has served as Vice President and Chief Financial Officer of
the Company since 1994. Mr. Barton served as Vice President and Controller of
the Company from 1992 to 1994, Corporate Controller of the Company from 1982 to
1992, and Controller of Water Technologies from 1980 to 1982.
 
     James A. Feddersen has served as Secretary of the Company since 1990. Mr.
Feddersen is a shareholder of the law firm of Whyte Hirschboeck Dudek S.C.,
which he joined in 1973. See "Certain Relationships and Related Transactions"
and "Legal Matters."
 
     James H. Fordyce has served as a Director of the Company since August,
1997. Mr. Fordyce is a general partner of J. H. Whitney & Co., a private equity
and mezzanine capital investment firm, which he joined in 1996. Mr. Fordyce
serves on the board of directors of several private companies. Mr. Fordyce was
Senior Vice President of Heller Financial, Inc., a commercial finance firm, from
1988 to 1996.
 
     James W. Hook has served as a Director of the Company since January, 1998.
Mr. Hook has been a professor at the Robert J. McCormick School of Engineering
at Northwestern University since 1992. Mr. Hook served as consultant to
MascoTech, Inc. from 1992 to 1996.
                                       64
<PAGE>   69
 
     Daniel J. Johnson has served as the President of Water Technologies since
September 1997. Prior to joining the Company, Mr. Johnson served as Vice
President and General Manager of MagneTek Corporation -- Power Electronics and
Drives Division from 1995 to 1997, as MagneTek's Division Vice President --
Operations from 1994 to 1995, and as Vice president of MagneTek's Engineered
Systems Business Unit from 1991 to 1994. MagneTek Corporation designs,
manufactures and markets variable speed drive automation products and systems.
 
     William P. Killian has served as a Director of the Company since 1993. Mr.
Killian has served as Vice President -- Corporate Development and Strategy at
Johnson Controls, Inc., a global manufacturer of automotive systems and
controls, since 1987. Mr. Killian is also a director of Gehl Company and Q.E.P.
Company, Inc.
 
     Charles J. Norris has served as Vice President and Chief Information
Officer of the Company since 1996. Prior to joining the Company, Mr. Norris
spent 16 years at Norris Systems Group, Inc., a business systems consulting
company founded and owned by Mr. Norris.
 
     Michael R. Stone has served as a Director of the Company since August,
1997. Mr. Stone is a general partner of J. H. Whitney & Co., a private equity
and mezzanine capital investment firm, which he joined in 1989. Mr. Stone is an
alternate director of Steel Dynamics, Inc., and serves on the board of directors
of several private companies.
 
     Daniel B. Teich has served as the Company's Division President, National
Dynamics since he joined the Company in August, 1998. From January, 1997 until
he joined the Company, Mr. Teich served as the President of Ransomes America, a
manufacturer and distributor of golf course and professional lawn care equipment
and products. During 1996 Mr. Teich served as Managing Director of Pitney Bowes
Management Services Canada, Inc., and from 1993 to 1995 Mr. Teich served as the
President of Monarch Marketing Systems, Inc.
 
     Ronald G. Thimm has served as Treasurer of the Company since 1990, and
prior to that as Assistant Treasurer since 1981.
 
DIRECTOR COMPENSATION
 
     Directors of the Company, other than Messrs. Hook and Killian, receive no
compensation for their services as directors. The Company has entered into
written agreements with Messrs. Hook and Killian with regard to compensation for
their services as directors.
 
     In accordance with the agreement entered into between the Company and Mr.
Killian on December 17, 1997, effective August 1, 1997, for so long as Mr.
Killian remains a director of the Company, the Company will pay him $2,500 on
the first day of February, April, July and November each year, regardless of the
number of meetings held or attended. In addition, the Company agreed to grant
Mr. Killian an option to purchase 600 shares of Common Stock of the Company at a
price of $3.75 per share on August 1 of each year, for so long as Mr. Killian
remains a director. Each option granted to Mr. Killian under this agreement
vests and becomes fully exercisable on July 31 of the year subsequent to the
date of grant and, if not previously exercised, expires and terminates on August
1, 2007; provided, however, that in the event of a Stock Sale, Reorganization or
Termination, as those terms are defined in the December 17, 1997 agreement, the
option may expire and terminate prior to such date.
 
     In accordance with the agreement entered into between the Company and Mr.
Hook on February 19, 1998, effective January 23, 1998, the Company paid Mr. Hook
a one-time fee of $20,000 upon his acceptance of such agreement and, for so long
as Mr. Hook remains a director of the Company, the Company will pay him $2,500
on the first day of February, April, July and November each year, regardless of
the number of meetings held or attended. In addition, the Company granted Mr.
Hook an option to purchase 1,125 shares of Common Stock of the Company at a
price of $3.75 per share, which vest and become fully exercisable at the rate of
225 shares per year commencing on December 31, 1998 through and including
December 31, 2002, and which, if not previously exercised, expires and
terminates on February 11, 2008; provided, however, that in the event of a Stock
Sale, Reorganization or Termination, as those terms are defined in the February
19, 1998 agreement, the option may expire and terminate prior to such date.
 
                                       65
<PAGE>   70
 
     The options granted to Messrs. Killian and Hook pursuant to their
compensation agreements with the Company are non-statutory options that are not
part of Aqua-Chem's employee Stock Option Plan and are non-transferable, except
through inheritance. The stock acquired by Messrs. Killian or Hook pursuant to
such options is subject to certain put-call provisions in the event of death or
disability and to a right of first refusal of the Company in the event of any
sale, transfer or other disposition of such stock.
 
                                       66
<PAGE>   71
 
EXECUTIVE COMPENSATION
 
     The following table sets forth the cash and other compensation paid by the
Company in the fiscal years ended December 31, 1995 and 1996 and in the twelve
months ended December 31, 1997, to the Company's Chief Executive Officer and to
each of the Company's four other most highly compensated executive officers as
of December 31, 1997 (collectively, including the Chief Executive Officer, the
"Named Executive Officers"):
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                 ANNUAL COMPENSATION(A)
                                                  ----------------------------------------------------
                                                                                          ALL OTHER
         NAME AND PRINCIPAL POSITION              YEAR          SALARY     BONUS(B)    COMPENSATION(C)
- ----------------------------------------------    ----         --------    --------    ---------------
<S>                                               <C>          <C>         <C>         <C>
Jeffrey A. Miller.............................    1997(d)(e)   $182,736    $304,712        $   292
Chairman of the Board, Chief                      1996(e)            --          --             --
Executive Officer, President                      1995(e)            --          --             --
J. Scott Barton...............................    1997(d)      $148,086    $ 82,571        $96,420
Vice President, Chief                             1996          124,578      45,351         14,187
Financial Officer                                 1995          118,574          --         15,181
Rand E. McNally(f)............................    1997(d)      $182,226    $ 79,528        $99,350
Former Executive Vice President,                  1996          145,018      61,285         11,588
General Manager-Cleaver-Brooks                    1995          145,018      12,689         11,647
Charles J. Norris.............................    1997(d)      $101,478    $ 34,804        $31,534
Vice President, Chief                             1996           84,320      27,123          3,942
Information Officer                               1995           80,262       2,019          3,779
Ronald G. Thimm...............................    1997(d)      $ 89,606    $ 30,977        $ 7,883
Treasurer                                         1996           86,310      27,123          6,541
                                                  1995           82,805          --          7,400
</TABLE>
 
- ------------------------------------
(a) Certain personal benefits provided by the Company to the Named Executive
    Officers are not included in the table as permitted by regulations of the
    Commission because the aggregate amount of such personal benefits for each
    Named Executive Officer in each year reflected in the table did not exceed
    the lesser of $50,000 or 10% of the sum of such officer's salary and bonus
    in such year.
 
(b) Bonuses are reported for the year or period in which earned, although the
    bonuses were paid after the end of the year or period shown.
 
(c) "All Other Compensation" includes the following:
 
<TABLE>
<CAPTION>
                                                      MILLER     BARTON     MCNALLY    NORRIS     THIMM
                                                      -------    -------    -------    -------    ------
    <S>                                       <C>     <C>        <C>        <C>        <C>        <C>
    Company match under Aqua-Chem's
      401(k) savings plan.................    1997    $    --    $ 4,750    $ 4,750    $    --    $2,870
                                              1996         --      4,069      4,750         --     2,589
                                              1995         --      4,046      4,620         --     2,920
    Life insurance premium payments(i)....    1997    $   292    $10,270    $   700    $   390    $  344
                                              1996         --      5,135        838        488       500
                                              1995         --      5,135      1,027        568       586
    Company Retirement Plan
      contribution........................    1997    $    --    $ 6,400    $ 6,400    $ 6,144    $4,669
                                              1996         --      4,983      6,000      3,454     3,452
                                              1995         --      6,000      6,000      3,211     3,894
    "Change In Control" bonus(ii).........    1997    $    --    $75,000    $87,500    $25,000    $   --
</TABLE>
 
    ----------------------------------------
     (i) The premiums paid for Mr. Barton's policy in calendar 1997 were for two
         years of coverage.
 
    (ii) See "Employment Agreements," below.
 
(d) Represents aggregate compensation for the twelve months ended December 31,
    1997 (combining the seven-month fiscal year ended July 31, 1997 and the five
    months ended December 31, 1997).
 
                                       67
<PAGE>   72
 
(e) Mr. Miller became President and Chief Executive Officer pursuant to an
    Interim Management Agreement (the "Management Agreement"), dated July 8,
    1996, as amended, between the Company and J. Miller Management, Inc.
    ("JMM"). Amounts paid by the Company under the Management Agreement were
    paid to JMM and Mr. Miller was separately compensated by JMM. Mr. Miller
    served as President and Chief Executive Officer pursuant to the Management
    Agreement until July 31, 1997, when he became employed by the Company. See
    "Certain Relationships and Related Transactions."
 
(f) Mr. McNally served as the Company's Executive Vice President and General
    Manager-Cleaver-Brooks Division from November, 1994, until his resignation
    on November 17, 1998.
 
EMPLOYMENT AGREEMENTS
 
     The Company has employment agreements with all of the Named Executive
Officers currently employed by the Company except Mr. Thimm. These agreements
govern the compensation, benefits and treatment upon termination under various
circumstances, including voluntary termination by either party or termination by
reason of retirement, death or disability.
 
     Compensation under these employment agreements includes a base salary plus
a bonus calculated under the Company's management incentive program as a
percentage of the executive's base salary. Each Named Executive Officer is
entitled to participate in all employee benefit plans made available to the
Company's senior executive officers, including, without limitation, medical,
disability, life insurance, retirement and management incentive plans. The
employment agreements for the Named Executive Officers provide for additional
benefits, such as club membership, vacation, use of a Company car and
supplemental life insurance. The employment agreements of Messrs. Barton and
Norris provide for a bonus calculated as a percentage of base salary (50% in the
case of Mr. Norris and 100% in the case of Mr. Barton) in the event of a Change
In Control, as that term is defined in the respective employment agreements. In
connection with the Management Buy-Out, in July 1997 Messrs. Barton and Norris
were awarded bonuses of $150,000 and $50,000, respectively, pursuant to such
Change In Control provisions. Mr. Bruce Dickson, the Company's former Vice
President of Human Resources, and Mr. McNally, the Company's former Executive
Vice President and General Manager-Cleaver-Brooks, also received Change In
Control bonuses of $55,000 and $175,000, respectively. Mr. Dickson subsequently
passed away in April, 1998, and Mr. McNally resigned on November 17, 1998.
One-half of the amount of each Named Executive Officer's Change In Control bonus
was paid in August 1997 and is reflected in the Summary Compensation Table under
"All Other Compensation." Payment of the remaining one-half was contingent upon
continued employment with Aqua-Chem for a period of six months following the
Change In Control, was paid to the Named Executive Officers on February 1, 1998.
The February 1998 payment is not reflected in the Summary Compensation Table.
 
     Each employment agreement continues indefinitely until terminated as
provided in the agreement, except for Mr. Miller's employment agreement which is
for a six year term expiring on July 31, 2003, unless terminated prior to the
end of such term as provided in the agreement. Each employment agreement may be
terminated by either the Company or the executive at any time by giving notice
as required under the agreement; provided, however, that under certain
conditions the executive may be entitled to certain severance benefits as
described in that executive's individual agreement. Each agreement also imposes
certain confidentiality obligations on the executive and places restrictions on
the executive's involvement in activities that may compete with the Company and
on engaging fellow employees both during employment and following termination.
Violation of such provisions, or other termination for cause, as defined in the
agreements, may result in forfeiture of severance and other benefits that may
otherwise accrue.
 
RETIREMENT AND SAVINGS PROGRAMS
 
     The Company maintains a defined contribution retirement plan which includes
a 401(k) savings plan. Substantially all employees who are not members of
collective bargaining groups are eligible to participate. The Company's
retirement contribution equals 4% of eligible compensation while 401(k)
contributions equal 50% of employee contributions to a maximum Company
contribution of 3% of eligible compensation. Under
 
                                       68
<PAGE>   73
 
provisions of the 401(k) savings plan, employees may voluntarily contribute a
maximum of 17% of eligible compensation.
 
     In connection with the Acquisition, the Company assumed the sponsorship of
the National Dynamics Corporation 401(k) Plan and the National Dynamics
Corporation Union Pension Plan that were previously maintained by NDC, for the
benefit of employees of the Company's National Dynamics Division.
 
     The Company also maintains employee incentive plans covering substantially
all employees who are not members of collective bargaining groups. The Company's
contribution to these plans is based upon defined levels of profitability.
 
     The Company maintains unfunded health care plans covering certain eligible
retirees and employees. The estimated costs of postretirement benefits,
principally health care, are accrued over the period the benefits are earned.
The Company's policy is to fund postretirement benefits as incurred.
 
MANAGEMENT INCENTIVE PLANS
 
     On November 15, 1996, the Company adopted the Aqua-Chem, Inc. Management
Incentive Plan (the "Management Incentive Plan") and the Aqua-Chem, Inc.
Executive Management Incentive Plan (the "Executive Management Incentive Plan").
 
     The Management Incentive Plan was implemented to provide an incentive to
motivate and reward key management eligible employees for achievement of
short-term results. The incentive payment to participants is calculated through
a formula that utilizes Return On Net Assets, or RONA (subject to adjustment in
the event of certain extraordinary charges, such as acquisitions, divestitures
and/or major new strategic initiatives) as the critical financial performance
measure. Participation is limited to selected senior level employees from each
of the business units and at the corporate level. An Administrative Committee is
responsible for administration of the Management Incentive Plan (including
selection of participants, setting individual incentive opportunity ranging from
10% to 100% of the participant's annual salary, setting financial targets, and
evaluation of performance), subject to the review and final approval of the
Compensation Committee of the Board.
 
     The purpose of the Executive Management Incentive Plan, which was
terminated on December 31, 1997, was to focus the senior management team on
implementing and achieving long-term strategic business plans and financial
performance goals to enhance shareholder value. The incentive payment to
participants was calculated each year through a formula based on three-year
Return On Equity, or ROE, goals. Participation was limited to senior level
executives and officers and who had typically been with the Company for at least
one full three-year period.
 
STOCK OPTION PLANS
 
     In connection with the Management Buy-Out, the Company adopted the
Aqua-Chem, Inc. 1997 Stock Option Plan (as amended and restated, the "1997 Stock
Option Plan"), which provides for the grant to key employees, from time to time
of non-statutory stock options to purchase up to an aggregate of 61,919 shares
of Common Stock of Aqua-Chem at exercise prices to be determined in accordance
with the provisions of the 1997 Stock Option Plan. The 1997 Stock Option Plan
provides that between 10% and 20% of the aggregate number of shares of Common
Stock underlying each series of options shall vest each year on the anniversary
of the date of the grant, provided that in the prior fiscal year (i) the option
holder completed at least twelve consecutive Months of Service (as defined in
the 1997 Stock Option Plan), and (ii) the Company attained 80% to 100% of a
specified target of EBITDA (as defined therein) ($18.3 million in the current
year, subject to adjustment in the event of certain extraordinary activities,
such as the Acquisition (the "EBITDA Goal")). In the event that an installment
does not vest on an anniversary date because the EBITDA Goal is not met, such
installment shall vest on the next succeeding anniversary date as to which (i)
the option holder has completed at least twelve consecutive Months of Service,
and (ii) the Company met the EBITDA Goal by a cumulative amount greater than or
equal to the prior cumulative EBITDA shortfalls. Notwithstanding the foregoing,
options granted under the 1997 Stock Option Plan shall vest automatically on the
seventh
 
                                       69
<PAGE>   74
 
anniversary of the date of the grant regardless of performance criteria. As of
the date of this Prospectus, the Company has granted an option to purchase 4,000
shares of Common Stock to Mr. Johnson at an exercise price of $3.75 per share
under the 1997 Stock Option Plan.
 
     On August 4, 1998 the Board adopted the Aqua-Chem, Inc. 1998 Stock Option
Plan (the "1998 Stock Option Plan") which provides for the grant to key
advisors, consultants and employees, from time to time, of non-statutory stock
options to purchase up to an aggregate of 61,919 shares of Common Stock at
exercise prices to be determined in accordance with the provisions of the 1998
Stock Option Plan. Options granted under the 1998 Stock Option Plan shall vest
on seventh anniversary of the date of grant, but may be accelerated subject to
the terms of a written agreement entered into between the Company and the
optionee at the time of the grant. As of the date of this Prospectus, the
Company has granted an option to purchase 15,740.40 shares to Mr. Teich at an
exercise price of $5.00 per share, the vesting of which shall be accelerated in
the event that certain performance criteria are met at the National Dynamics
Division.
 
PHANTOM STOCK PLAN
 
     On January 23, 1998, the Board approved the Aqua-Chem, Inc. 1998 Phantom
Stock Plan (the "Phantom Stock Plan"), effective April 1, 1998, as a replacement
for the Executive Management Incentive Plan, which was terminated as of December
31, 1997.
 
     The objective of the Phantom Stock Plan is to provide certain senior level
executives and officers with the opportunity to share in future increases in the
value of the Company's Common Stock. The Board (or a committee appointed by the
Board) selects participants and determines the number of shares of phantom stock
to be awarded to each participant. Participants who remain employed by the
Company as of the scheduled payment dates (with certain exceptions) become
entitled to receive the value of their phantom stock awards for that year if a
specified percentage of the EBITDA goal (as specified in the Phantom Stock Plan)
is attained (90% in the current year, subject to decrease in future years). The
value of a participant's phantom stock is determined by multiplying the number
of shares of phantom stock initially awarded to the participant that year by the
value of a share of Common Stock determined in accordance with a formula set
forth the Phantom Stock Plan which is based a multiple of Actual EBITDA with
certain balance sheet adjustments. Two-thirds of the value of a participant's
phantom stock award is scheduled to be paid in the June following the end of the
period to which the award relates, with the remaining third to be paid in the
June of the subsequent year. Regardless of the foregoing, in the event that the
amount that would have been paid out at the end of the 1998 or 1999 calendar
years under the Executive Management Incentive Plan is greater than the amount
payable under the Phantom Stock Plan as of June immediately following the end of
the twelve-month period to which the award relates (i.e. two-thirds of the total
value of the award), then the participant shall be entitled to the amount that
would have been payable under the Executive Management Incentive Plan. On April
1, 1998, the following awards were made to Named Executive Officers under the
Phantom Stock Plan, portions of which mature in 1999, 2000 and 2001: Mr. Barton
received 2,518 shares; Mr. McNally received 3,264 shares; Mr. Norris received
1,479 shares; and Mr. Thimm received 1,506 shares.
 
                                       70
<PAGE>   75
 
                    CAPITAL STOCK AND PRINCIPAL STOCKHOLDERS
 
CAPITAL STRUCTURE
 
     The Company has a single class of common stock and three classes of
preferred stock (denominated Series A, Series B, and Series C). As of the date
of this Prospectus, the Company had 2,006,260 shares of authorized capital
stock, itemized by class and series as follows:
 
     (i)   2,000,000 shares of Common Stock, par value $.01 per share
           ("Common"), of which 1,000,000 shares are issued and outstanding;
 
     (ii)  6,260 shares of Preferred Stock, par value $.01 per share, divided
           into the following series:
 
        (a) 130 shares of Series A Cumulative Preferred Stock, par value $.01
            per share ("Series A Preferred"), of which 52 shares are issued and
            outstanding.
 
        (b) 130 shares of Series B Cumulative Preferred Stock, par value $.01
            per share ("Series B Preferred"), of which 130 shares are issued and
            outstanding.
 
        (c) 6,000 shares of Series C Cumulative Preferred Stock, par value $.01
            per share ("Series C Preferred"), of which 2,755 shares are issued
            and outstanding.
 
     (iii) The Company has issued a warrant (the "Warrant") to purchase up to
           176,471 shares of Common at a price of one cent ($0.01) per share.
           The Warrant is exercisable at any time by the holder thereof on or
           prior to July 31, 2007.
 
     Series A Preferred. The Company formerly had 130 shares of Series A
Preferred outstanding, and used approximately $3.1 million of the proceeds of
the Private Offering to redeem 78 of such shares (see "The Exchange Offer -- Use
of Proceeds"). The remaining 52 shares of Series A Preferred will remain
outstanding subject to redemption as follows: one-half (26) of such shares will
be redeemed (at a redemption price of $1 million plus accrued dividends, if any)
on August 1, 2000 and the remainder will be redeemed (at a redemption price of
$1 million plus accrued dividends, if any) on August 1, 2001. Under the
Company's Certificate of Incorporation (the "Certificate"), holders of the
outstanding nonvoting Series A Preferred are entitled to receive cumulative cash
dividends of $577 per share per quarter beginning August 1, 1998. Holders of
Series A Preferred have the right to require the Company to redeem Series A
Preferred at an aggregate redemption price of $2 million plus accrued dividends
(i) simultaneous with the occurrence of an "overall ownership shift," "employee
ownership shift," or "asset shift" (each as defined in the Certificate); or (ii)
within the 120-day period following an initial public offering of the Company's
equity securities. The Company may call the outstanding shares at any time at
the redemption price of $38,462 per share plus accrued dividends.
 
     Series B Preferred. Holders of the nonvoting Series B Preferred are
entitled to receive cumulative cash dividends of approximately $1,538 per share
per year beginning August 1, 1997 payable at redemption. The redemption price of
Series B Preferred shall be the "Normal Redemption Price," which is generally
based upon Water Technologies' cumulative earnings before taxes for the period
1997 through 2001. The redemption price is modified in the event that prior to
December 31, 2001, either (i) Water Technologies is sold to an unrelated third
party; (ii) there occurs an initial public offering of the Company's equity
securities; or (iii) there occurs an "overall ownership shift," "employee
ownership shift" or "asset shift" (each as defined in the Certificate). The
maximum redemption price, under any circumstance, is $57,692 per share. Holders
of Series B Preferred generally have the right to require the Company to redeem
the Series B Preferred at the applicable redemption price plus accrued dividends
(i) simultaneous with the occurrence of an "overall ownership shift" (as defined
by the Certificate); (ii) within the 120-day period following an initial public
offering of the Company's equity securities; (iii) within the 120-day period
following a refinancing and retirement of the Existing Subordinated Debt; or
(iv) on July 31, 2004. Under certain circumstances the redemption of the Series
B Preferred could result in an event of default under the Indenture. See
"Description of the Notes -- Certain Covenants -- Limitation on Restricted
Payments." The holders of the Series B
 
                                       71
<PAGE>   76
 
Preferred elected not to require that the Series B Preferred be redeemed in
connection with the Private Offering.
 
     Series C Preferred. Holders of Series C Preferred are entitled to receive
quarterly dividends at the rate of 10.17% per year on the original issue price
per share ($964) beginning on August 1, 1997. Holders of Series C Preferred
generally shall have the right to require the Company to redeem all or any part
of Series C Preferred at a price equal to $1,000 per share, plus accrued
dividends (i) upon an "overall ownership shift," "employee ownership shift," or
"asset shift" (each as defined by the Certificate); (ii) within the 120-day
period following an initial public offering of the Company's equity securities;
or (iii) on July 31, 2005. Any time after July 31, 2004, the Company may call
the outstanding shares at the redemption price of $1,000 per share plus accrued
dividends, provided that the Series A Preferred and Series B Preferred have each
been redeemed. Each share of Series C Preferred has one vote per share,
equivalent to the voting rights of one share of Common.
 
PRINCIPAL STOCKHOLDERS
 
     Series A and Series B Preferred. The Company's Series A Preferred and
Series B Preferred are owned as follows:
 
<TABLE>
<CAPTION>
                                                           SERIES A PREFERRED           SERIES B PREFERRED
                                                         -----------------------      -----------------------
                                                          NUMBER        PERCENT        NUMBER        PERCENT
                                                         OF SHARES      OF CLASS      OF SHARES      OF CLASS
                                                         ---------      --------      ---------      --------
<S>                                                      <C>            <C>           <C>            <C>
Lyonnaise American Holding, Inc.(b)..................      41.6          80.0%           104          80.0%
Gestra Corporation, N.V.(c)..........................      10.4          20.0%            26          20.0%
</TABLE>
 
- ------------------------------------
(a) See "-- Capital Structure -- Series A Preferred" above.
 
(b) c/o Patrick Babin, Northumbrian Water Group, 24. St James's Square, SW1 Y6HZ
    London, England.
 
(c) c/o Miraj Uddin, Rezayat Trading Co. Ltd., P.O. Box 106, Safat, Kuwait
    13002.
 
     Common and Series C Preferred. The following table sets forth the
beneficial ownership as of the date of this Prospectus of the outstanding Common
and Series C Preferred by (i) each person who is known to the Company to be the
beneficial owner of five percent or more of the outstanding classes shown; (ii)
each director; (iii) each of the Named Executive Officers; and (iv) all
directors and executive officers of the Company as a group.
 
                                       72
<PAGE>   77
 
     All (100%) of the outstanding shares of Common and Series C Preferred are
held by Rush Creek LLC ("Rush Creek"). Pursuant to the Operating Agreement of
Rush Creek, shares of Common and Series C Preferred (and, in the case of the
Whitney Subordinated Debt Fund, L.P., the Warrant) are allocated to each
member's account as set forth in the table below.
 
<TABLE>
<CAPTION>
                                                                         SERIES C
                                             COMMON STOCK             PREFERRED STOCK       TOTAL VOTING POWER
                                        -----------------------   -----------------------   -------------------
                                         NUMBER OF                 NUMBER OF
                                           SHARES      PERCENT       SHARES      PERCENT     NUMBER    PERCENT
                                        BENEFICIALLY      OF      BENEFICIALLY      OF         OF         OF
                                          OWNED(A)     CLASS(B)     OWNED(A)     CLASS(B)   VOTES(C)   VOTES(B)
                                        ------------   --------   ------------   --------   --------   --------
<S>                                     <C>            <C>        <C>            <C>        <C>        <C>
Whitney Equity Partners, L.P.(d)......    510,000        51.0%       1,743         63.3%    511,743      51.0%
Whitney Subordinated Debt Fund
  L.P.(e).............................    176,471        15.0           --           --          --        --
Jeffrey A. Miller (f), (g)............    400,202        40.0          827         30.0     401,029      40.0
James H. Fordyce(f)...................         --          --           --           --          --        --
James W. Hook.........................         --          --           --           --          --        --
William Killian(h)....................      8,166        *              17         *          8,183      *
Michael R. Stone(f)...................         --          --           --           --          --        --
J. Scott Barton(i)....................     49,000         4.9          101          3.7      49,101       4.9
Charles Norris(j).....................     16,300         1.6           34          1.2      16,334       1.6
Ronald G. Thimm.......................         --          --           --           --          --        --
All directors and executive officers
  as a group (consisting of 11
  persons)............................    481,834        48.2          996         36.1     482,830      48.2
</TABLE>
 
- ------------------------------------
(a) "Beneficial ownership" is defined under regulations of the Commission as the
    power directly or indirectly, through any contract, arrangement,
    understanding, relationship, or otherwise to vote (or direct the voting of)
    or dispose of (or direct the disposition of) stock, including stock of which
    an individual has the right to acquire beneficial ownership (as defined)
    within 60 days. In the above table, beneficial ownership reflects the number
    of shares of Common or Series C Preferred allocated to the Rush Creek
    capital account of the entity and individual members shown. Fractional
    shares are not shown in the table, rather, the numbers of shares are rounded
    to the nearest whole share.
 
(b) Asterisk (*) denotes less than 1%.
 
(c) Voting power is combined because each share of Common and each share of
    Series C Preferred has one (1) vote per share.
 
(d) 177 Broad Street, Stamford, Connecticut 06901. Whitney Equity Partners, L.P.
    ("WEP") has 510,000 shares of Common and 1,743 shares of Series C Preferred
    allocated to its Rush Creek capital account. WEP is a manager of Rush Creek
    (see Note (f)).
 
(e) 177 Broad Street, Stamford, Connecticut 06901. The Whitney Subordinated Debt
    Fund, L.P., a fund managed by J. H. Whitney & Co. ("WSDF") has the Warrant
    (see "-- Capital Structure") allocated to its Rush Creek capital account.
    WSDF is a manager of Rush Creek (see Note (f)). The percentage shown in the
    table assumes the Warrant is exercised in full. If the Warrant were
    exercised in full, the voting power (with respect to allocated shares of
    Series C Preferred and Common) of all other entities,
 
                                       73
<PAGE>   78
 
    individuals, and the group listed in the above table would be diluted, with
    the resulting voting percentages as follows:
 
<TABLE>
<CAPTION>
                                                                       RESULTING
                                                                     VOTING POWER
                                                                       ASSUMING
                          BENEFICIAL OWNER                        EXERCISE OF WARRANT
                          ----------------                        -------------------
    <S>                                                           <C>
    WEP.........................................................         43.4%
    WSDF........................................................         15.0
    Jeffrey A. Miller (see Note (g), below......................         34.0
    J. Scott Barton (see Note (j), below).......................          4.2
    Charles Norris (see Note (k), below)........................          1.4
    All directors and executive officers as a group (consisting
      of 11 persons)............................................         40.9
</TABLE>
 
(f) There are six managers of Rush Creek: WEP, WSDF, and Messrs. Miller,
    Fordyce, Stone and Barton. As managers of Rush Creek, these entities and
    individuals may be deemed to share voting and dispositive power with respect
    to all (100%, or 1,000,000 shares) of Common and all (100%, or 2,755 shares)
    Series C Preferred held by Rush Creek. Each such individual or entity
    disclaims beneficial ownership with respect to all 1,000,000 shares of
    Common and all 2,755 shares of Series C Preferred other than those shares
    set forth opposite their respective names in the above table; in addition,
    Messrs. Miller and Barton further disclaim beneficial ownership with respect
    to certain of the shares set forth opposite their respective names in the
    above table. See Notes (g) and (j), below.
 
(g) These shares are beneficially owned by two entities controlled by Mr.
    Miller. The Jeffrey A. Miller Family LLC ("Miller LLC") is a limited
    liability company of which Jeffery A. Miller is the manager and sole voting
    member. The Miller LLC is a member of Rush Creek and has 130,001 shares of
    Common and 269 shares of Class C Preferred allocated to its Rush Creek
    capital account. The Jeffrey A. Miller Trust u/a/d/ May 10, 1997 ("Miller
    Trust") is a revocable trust of which Jeffery A. Miller (the president and
    chief executive officer of the Company) is the grantor, beneficiary, and
    trustee. The Miller Trust is a member of Rush Creek and has 270,201 shares
    of Common and 558 shares of Series C Preferred allocated to its Rush Creek
    capital account. Mr. Miller is a manager of Rush Creek (see Note (f)).
 
(h) Mr. Killian is a member of Rush Creek and has 8,166 shares of Common and 17
    shares of Series C Preferred allocated to his Rush Creek capital account.
 
(i) These shares are beneficially owned by an entity controlled by Mr. Barton,
    the J. Scott Barton Trust u/a/d December 22, 1997 ("Barton Trust"), a
    revocable trust of which Mr. Barton is the grantor, beneficiary, and
    trustee. The Barton Trust is a member of Rush Creek and has 49,000 shares of
    Common and 101 shares of Series C Preferred allocated to its Rush Creek
    capital account.
 
(j) These shares are beneficially owned by two entities controlled by Mr.
    Norris. The Charles J. Norris Family LLC ("Norris LLC") is a limited
    liability company of which Mr. Norris is the manager and sole voting member.
    The Norris LLC is a member of Rush Creek and has 3,260 Shares of Common and
    7 shares of Series C Preferred allocated to its Rush Creek capital account.
    The Charles Norris Trust u/a/d/ November 21, 1997 ("Norris Trust") is a
    revocable trust of which Mr. Norris is the grantor, beneficiary, and
    trustee. The Norris Trust is a member of Rush Creek and has 13,040 shares of
    Common and 27 shares of Series C Preferred allocated to its Rush Creek
    capital account.
 
VOTING AGREEMENT
 
     Pursuant to a Stockholders' and Members' Agreement among the stockholders
of the Company and the Members of Rush Creek, the parties thereto have agreed to
vote to elect a six-member board of directors consisting of (i) two directors
designated by J. H. Whitney & Co. (or WEP and WSDF) (currently, Messrs. Fordyce
and Stone); (ii) two directors designated by certain senior executive officers
of the Company ("Management") (currently, Mr. Miller; the one vacancy on the
Board being a director to be designated by Management); and (iii) two
independent directors who are agreeable to each of J. H. Whitney & Co. and
Management (currently, Messrs. Hook and Killian). The Stockholders' and Members'
Agreement further
 
                                       74
<PAGE>   79
 
provides that, in the event of a material breach of certain documents entered
into by the parties in connection with the Management Buy-Out ("Transaction
Documents"), the parties agree to increase the number of directors to nine and
to elect three additional directors designated by J. H. Whitney & Co. (or WEP
and WSDF). Each Member of Rush Creek has one vote per Membership Unit. However,
pursuant to the Rush Creek Operating Agreement, the Membership Units of Rush
Creek are designated as either "Institutional Investor Membership Units" (which
includes the Membership Units held by WEP and WDSF) or "Management Membership
Units" (which includes the Membership Units held by the Miller LLC, the Miller
Trust, the Barton Trust, the Norris LLC, and the Norris Trust). The election of
the Managers of Rush Creek is subject to a provision of the Operating Agreement
which requires that two managers shall be elected by a majority of the
Institutional Investor Membership Units and two managers shall be elected by a
majority of the Management Membership Units. The Operating Agreement further
provides that, in the event of a material breach of a Transaction Document, one
additional manager shall be designated by a majority of the Institutional
Investor Membership Units.
 
                                       75
<PAGE>   80
 
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
MANAGEMENT AGREEMENT
 
     The Company entered into an Interim Management Agreement ("Management
Agreement") with J. Miller Management, Inc. ("JMM") dated July 8, 1996, pursuant
to which the Company engaged JMM to provide the services of Mr. Miller as the
Company's President and Chief Executive Officer. Mr. Miller is the President and
co-owner of JMM. The Management Agreement provided that Mr. Miller would serve
as Interim Chief Executive Officer, provide management services and expertise to
the Company, and manage the operations of the Company, commencing on July 8,
1996. The Management Agreement was terminable at will by either party; however,
if the Company were to have terminated the Management Agreement without cause it
would have been liable for all compensation due thereunder. If the Company were
to have terminated the Management Agreement with cause (including Mr. Miller's
failure to obtain government security clearance) it would have been liable only
for accrued obligations through the date of termination.
 
     Pursuant to the Management Agreement, the Company agreed to pay JMM $10,000
per week, plus the cost of living accommodations for Mr. Miller in the Milwaukee
area. The Company also agreed to reimburse JMM for out-of-pocket expenses
incurred by JMM on behalf of the Company under the Management Agreement,
including the cost of a company car and weekly travel to and from Mr. Miller's
home in Michigan.
 
     The Management Agreement was amended on January 12, 1997 to extend its term
through December 31, 1997 and to provide for the payment to JMM of incentive
compensation for 1997 in accordance with the Company's Management Incentive
Plan. See "Management -- Management Incentive Plans." Under the Management
Agreement, the amount of incentive compensation that JMM would be paid was based
on base incentive compensation of $356,000 multiplied by a percentage based on a
sliding scale of from 50% to 150% tied to the Company's EBIT (as defined
therein) for the twelve months ended December 31, 1997. If 1997 EBIT were less
than $6.7 million, no incentive compensation would be due under the Management
Agreement; if 1997 EBIT were equal to or greater than $6.7 million but less than
$11.0 million, the base incentive compensation would have been multiplied by
50%; if 1997 EBIT were equal to or greater than $11.0 million but less than
$14.0 million, the base incentive compensation would have been multiplied by
100%; if 1997 EBIT were equal to or greater than $14.0 million but less than
$17.0 million, the base incentive compensation would have been multiplied by
125%; and if 1997 EBIT were equal to or greater than $17.0 million, the base
incentive compensation would have been multiplied by 150%.
 
     The Management Agreement, as amended, also provided for additional
compensation in the event of a completed sale of the Company by December 31,
1998, based on a formula which provided for a Sale Bonus of $356,000 (the "Sale
Bonus") payable if the "net consideration" (as defined in the Management
Agreement) received for the Company was less than $40 million and a percentage
of the excess over $40 million ("Excess Consideration"). The percentage was 1%
of the first $5 million of Excess Consideration, 2% of the second $5 million of
Excess Consideration, 3% of the third $5 million of Excess Consideration, 4% of
the fourth $5 million of Excess Consideration, and 5% of any additional Excess
Consideration (that is, the amount by which the net consideration exceeded $60
million). The Sale Bonus became payable as a result of the Management Buy-Out.
 
     The Management Agreement was terminated on July 31, 1997 when Mr. Miller
became employed by, and entered into an employment agreement with, the Company
(see "Management -- Employment Agreements"). The total cost to the Company for
Mr. Miller's services under the Management Agreement for 1997 was approximately
$1,514,000, including incentive compensation of approximately $267,000 and a
Sale Bonus of $861,000. The total cost to the Company for Mr. Miller's services
under the Management Agreement for 1996 was approximately $286,000.
 
OTHER
 
     Three of the directors of the Company (Messrs. Fordyce, Miller and Stone)
are managers of Rush Creek, which holds 100% of the Common and Series A
Preferred Stock of the Company. Two of the directors of the Company (Messrs.
Fordyce and Stone) are general partners of J. H. Whitney & Co., which manages
Whitney Equity Partners, L.P., a principal owner of Rush Creek. See "Capital
Stock and Principal
                                       76
<PAGE>   81
 
Stockholders -- Principal Stockholders." Contemporaneous with the closing of the
Management Buy-Out, the Company paid J.H. Whitney & Co. a debt placement fee of
$630,000 as compensation for its services in connection with the placement of
$21.0 million in subordinated debt with Whitney Subordinated Debt Fund, L.P. and
a transaction fee of $210,000 related thereto, and reimbursed the reasonable
out-of-pocket expenses incurred by Whitney Equity Partners, L.P. and Whitney
Subordinated Debt Fund, L.P. in connection with the Management Buy-Out and
related transactions. In addition, the Company has agreed to pay J. H. Whitney &
Co. a monitoring fee of $50,000 annually on the first business day of each year
commencing in 1998, and an annual recognition fee of $25,000, also commencing in
1998. In exchange for these fees, J.H. Whitney & Co. performs financial and
strategic investment advisory services for the Company. The recognition fee is
accrued annually and will become payable upon the occurrence of an initial
public offering or an "Organic Transaction" (as defined in the Company
Certificate of Incorporation to include a sale of substantially all the assets
of the Company or a merger of the Company or other similar transaction) or an
initial public offering of the Company's securities.
 
     James A. Feddersen, Secretary of Aqua-Chem, is a shareholder in the law
firm of Whyte Hirschboeck Dudek S.C., which performs legal services for
Aqua-Chem. Through Rush Creek, Mr. Feddersen owns approximately 8,166 shares, or
approximately 0.8% of the outstanding Common Stock and approximately 17 shares,
or approximately 0.6% of the outstanding Series C Preferred Stock. See "Capital
Stock and Principal Stockholders -- Common and Series C Preferred" and "Legal
Matters."
 
     The Company has, pursuant to its Certificate of Incorporation and Bylaws,
established a policy indemnifying officers and directors, to the fullest extent
allowed by the Delaware General Corporation Law, for liabilities and expenses
arising out of their actions in their capacities as officers and directors. This
provision does not exclude indemnification for liability on the part of officers
and directors under the Securities Act arising out of material
misrepresentations or omissions contained in a registration statement filed
under the Securities Act. However, insofar as indemnification for liabilities
arising under the Securities Act may be permitted to directors, officers, and
controlling persons pursuant to the foregoing provisions, the Company have been
informed that, in the opinion of the Commission, such indemnification is against
public policy as expressed in the Securities Act and is therefore unenforceable.
 
                                       77
<PAGE>   82
 
                                THE ACQUISITION
 
THE PURCHASE AGREEMENT
 
     On May 28, 1998, Aqua-Chem entered into a definitive agreement (the "Asset
Purchase Agreement") with National Dynamics Corporation ("NDC"), a Nebraska
corporation, and three of NDC's individual shareholders who collectively held
83.3% of the issued and outstanding shares of NDC (the "Shareholders"), to
acquire substantially all of the assets of NDC for a purchase price of $47.0
million plus the assumption of certain liabilities. Pursuant to the Asset
Purchase Agreement, the purchase price is subject to certain post-closing
adjustments based upon a closing balance sheet and NDC's physical inventory as
of the closing date. See "Summary -- Recent Developments -- Purchase Price
Dispute."
 
     The Asset Purchase Agreement provided for the assumption of certain of
NDC's liabilities by Aqua-Chem, including without limitation, contractual
obligations to furnish goods and services or to pay for goods and services that
were acquired; provided, however, that Aqua-Chem did not assume any liabilities
for personal or property damage related to Products Sold (as defined therein).
The Asset Purchase Agreement included customary representations and warranties
by Aqua-Chem, NDC and the Shareholders regarding business and legal issues and
customary indemnification provisions. In the Asset Purchase Agreement, NDC and
the Shareholders covenanted not to compete with Aqua-Chem, as described therein,
for a period of 48 months following the closing date and not to disclose
Confidential Information (as defined therein) except as provided therein.
 
FINANCING
 
     Aqua-Chem used a portion of the proceeds of the Private Offering to finance
the Acquisition, which was closed on June 23, 1998, concurrently with the
Private Offering. See "The Exchange Offer -- Use of Proceeds." Since the
Acquisition, the former business of NDC has been operated as the National
Dynamics Division of the Company. There can be no assurance that the expected
benefits of the Acquisition will be realized. See "Risk Factors -- Realization
of the Benefits of the Acquisition."
 
                                       78
<PAGE>   83
 
                      DESCRIPTION OF CERTAIN INDEBTEDNESS
 
NEW CREDIT FACILITY
 
     In connection with the Private Offering, the Company amended and restated
its existing revolving credit facility (as amended and restated, the "New Credit
Facility"). Borrowings under the New Credit Facility bear interest at variable
rates and permit borrowings and letters of credit totaling $45.0 million.
 
     The obligations of the Company under the New Credit Facility are guaranteed
by all existing and future domestic subsidiaries and by Rush Creek, and
borrowings under the New Credit Facility are secured by substantially all of the
assets of the Company, other than assets (including real property) of foreign
subsidiaries. Pricing on the New Credit Facility is, at the option of the
Company, (i) a base rate equal to the higher of Comerica's prime rate or the
Federal funds rate plus 1.00%, or (ii) a Eurodollar-based rate plus an
applicable margin ranging from 1.00% to 1.75% dependent on the ratio of total
debt to EBITDA. Letters of credit are priced at 1.00% to 1.75% dependent on the
ratio of total debt to EBITDA plus a facing fee. The Company also pays a
revolving credit facility fee of 0.25% to 0.50% dependent on the ratio of total
debt to EBITDA.
 
     The New Credit Facility contains certain restrictive covenants that impose
limitations upon, among other things, the ability of the Company and the
guarantors (other than Rush Creek) to incur liens; merge, consolidate or dispose
of assets; make loans and investments; incur indebtedness; engage in certain
transactions with affiliates; incur contingent obligations; enter into joint
ventures; enter into lease agreements; pay dividends and make other
distributions; change its business; and make capital expenditures.
 
     The New Credit Facility also contains covenants requiring the Company (a)
to maintain certain financial ratios as follows: (i) a fixed charge coverage
ratio; and (ii) a funded debt to EBITDA ratio; and (b) to maintain a minimum
base tangible net worth.
 
     Under the New Credit Facility the Company is required to maintain an
adjusted consolidated tangible net worth (consolidated tangible net worth plus
an amount equal to the aggregate outstanding principal amount of subordinated
debt) of not less than $70 million plus (on a cumulative basis) for each fiscal
quarter ending on or after June 23, 1998, the sum of (a) 50% of consolidated net
income if positive and 100% of the cash proceeds of the issuance of any equity
interest of the Company during such fiscal quarter. In addition, the New Credit
Facility requires the Company to maintain a fixed charge coverage ratio of not
less than 1.25 to 1 and a senior funded debt to consolidated EBITDA ratio of not
more than 3.5 to 1.
 
     All extensions of credit under the New Credit Facility are subject to
customary documentation and on the continued accuracy of all representations and
warranties as well as the absence of any Default or Event of Default (as defined
in the New Credit Facility).
 
     The New Credit Facility may be refinanced (as defined in the Indenture)
from time to time in accordance with the limits of the Indenture. See
"Description of the Notes -- Certain Covenants -- Limitation on Indebtedness"
and "-- Certain Definitions."
 
FOREIGN CREDIT FACILITIES
 
     Cleaver-Brooks of Canada, LTD has in place a Cdn$0.5 million revolving
credit facility established with a Canadian bank for convenience purposes and
for funding its working capital and other financing needs. This facility is
unsecured and payable on demand, and as of September 30, 1998, had no
outstanding balance.
 
                                       79
<PAGE>   84
 
                            DESCRIPTION OF THE NOTES
 
GENERAL
 
     The Existing Notes were, and the Exchange Notes are to be, issued under an
Indenture, dated as of June 23, 1998 (the "Indenture"), between the Company and
United States Trust Company of New York, as Trustee (the "Trustee").
 
     The following is a summary of certain provisions of the Indenture and the
Notes, a copy of which Indenture and the form of Notes is available upon request
to the Company at the address set forth under "Available Information." The
following summary of certain provisions of the Indenture does not purport to be
complete and is subject to, and is qualified in its entirety by reference to,
all the provisions of the Indenture, including the definitions of certain terms
therein and those terms made a part thereof by the Trust Indenture Act of 1939,
as amended. For purposes of this summary, the term "Company" refers only to
Aqua-Chem, Inc. and not to any of its subsidiaries.
 
     The Existing Notes were, and the Exchange Notes will be, issued only in
fully registered form, without coupons, in denominations of $1,000 and any
integral multiple of $1,000. No service charge shall be made for any
registration of transfer or exchange of Notes, but the Company may require
payment of a sum sufficient to cover any transfer tax or other similar
governmental charge payable in connection therewith.
 
TERMS OF THE NOTES
 
     The Existing Notes were, and the Exchange Notes will be, unsecured senior
subordinated obligations of the Company, initially in an aggregate principal
amount of $125.0 million aggregate principal amount, and will mature on July 1,
2008. The Notes bear interest at 11.25% per annum from June 23, 1998, or from
the most recent date to which interest has been paid or provided for, payable
semiannually to Holders of record at the close of business on the December 15 or
June 15 immediately preceding the interest payment date on January 1 and July 1
of each year, commencing January 1, 1999. The Company will pay interest on
overdue principal at 1% per annum in excess of such rate, and it will pay
interest on overdue installments of interest at such higher rate to the extent
lawful. Interest on the Existing Notes is, and the Exchange Notes will be,
computed on the basis of a 360-day year of twelve 30-day months.
 
     The interest rate on the Notes is subject to increase in certain
circumstances if the Company does not file a registration statement relating to
the Exchange Offer or if the registration statement is not declared effective on
a timely basis or if certain other conditions are not satisfied, all as further
described under "The Exchange Offer -- Registration Agreement."
 
     Subject to the covenants described below under "-- Certain Covenants" and
applicable law, the Company may issue additional Notes under the Indenture in an
unlimited aggregate principal amount. The Notes offered hereby and any
additional Notes subsequently issued would be treated as a single class for all
purposes under the Indenture.
 
OPTIONAL REDEMPTION
 
     Except as set forth in the following paragraph, the Notes will not be
redeemable at the option of the Company prior to July 1, 2003. Thereafter, the
Notes will be redeemable, at the Company's option, in whole or in part, at any
time or from time to time, upon not less than 30 nor more than 60 days' prior
notice mailed by first-class mail to each Holder's registered address, at the
following redemption prices (expressed in percentages of principal amount), plus
accrued interest to the redemption date (subject to the right of Holders
 
                                       80
<PAGE>   85
 
of record on the relevant record date to receive interest due on the relevant
interest payment date), if redeemed during the 12-month period commencing on
July 1 of the years set forth below:
 
<TABLE>
<CAPTION>
                           PERIOD                             REDEMPTION PRICE
                           ------                             ----------------
<S>                                                           <C>
2003........................................................      105.625%
2004........................................................      104.219
2005........................................................      102.813
2006........................................................      101.406
2007 and thereafter.........................................      100.000
</TABLE>
 
     In addition, at any time and from time to time prior to July 1, 2001, the
Company may redeem in the aggregate up to 20% of the original principal amount
of the Notes with the proceeds of one or more Public Equity Offerings following
which there is a Public Market, at a redemption price (expressed as a percentage
of principal amount) of 111.25% plus accrued interest to the redemption date
(subject to the right of Holders of record on the relevant record date to
receive interest due on the relevant interest payment date); provided, however,
that at least $100.0 million aggregate principal amount of the Notes remains
outstanding after each such redemption.
 
     In the case of any partial redemption, selection of the Notes for
redemption will be made by the Trustee on a pro rata basis, by lot or by such
other method as the Trustee in its sole discretion shall deem to be fair and
appropriate, although no Note of $1,000 in original principal amount or less
shall be redeemed in part. If any Note is to be redeemed in part only, the
notice of redemption relating to such Note shall state the portion of the
principal amount thereof to be redeemed. A new Note in principal amount equal to
the unredeemed portion thereof will be issued in the name of the Holder thereof
upon cancellation of the original Note.
 
RANKING
 
     The indebtedness evidenced by the Notes is a senior subordinated, unsecured
obligation of the Company. The payment of the principal of, premium (if any) and
interest on the Notes is subordinate in right of payment, as set forth in the
Indenture, to the prior payment in full of all Senior Indebtedness, whether
outstanding on the Issue Date or thereafter incurred, including the Company's
obligations under the Credit Agreement.
 
     As of June 30, 1998 the Company had no Senior Indebtedness outstanding.
Although the Indenture contains limitations on the amount of additional
Indebtedness that the Company may incur, under certain circumstances the amount
of such Indebtedness could be substantial and, in any case, such Indebtedness
may be Senior Indebtedness. See "-- Certain Covenants -- Limitation on
Indebtedness."
 
     A portion of the operations of the Company are conducted through its
subsidiaries. Claims of creditors of such subsidiaries, including trade
creditors, secured creditors and creditors holding indebtedness and guarantees
issued by such subsidiaries, and claims of preferred stockholders (if any) of
such subsidiaries generally will have priority with respect to the assets and
earnings of such subsidiaries over the claims of creditors of the Company,
including holders of the Notes, even though such obligations will not constitute
Senior Indebtedness. The Notes, therefore, will be effectively subordinated to
creditors (including trade creditors) and preferred stockholders (if any) of
subsidiaries of the Company. At September 30, 1998, the total liabilities of the
Company's subsidiaries were approximately $3.2 million, including trade
payables. Although the Indenture limits the incurrence of Indebtedness and
preferred stock of certain of the Company's subsidiaries, such limitation is
subject to a number of significant qualifications. Moreover, the Indenture does
not impose any limitation on the incurrence by such subsidiaries of liabilities
that are not considered Indebtedness under the Indenture. See "-- Certain
Covenants -- Limitation on Indebtedness."
 
     Only Indebtedness of the Company that is Senior Indebtedness will rank
senior to the Notes in accordance with the provisions of the Indenture. The
Notes will in all respects rank pari passu with all other Senior Subordinated
Indebtedness of the Company. The Company has agreed in the Indenture that it
will not Incur, directly or indirectly, any Indebtedness that is subordinate or
junior in ranking in right of payment to its Senior Indebtedness unless such
Indebtedness is Senior Subordinated Indebtedness or is expressly subordinated in
right
 
                                       81
<PAGE>   86
 
of payment to Senior Subordinated Indebtedness. Unsecured Indebtedness is not
deemed to be subordinated or junior to Secured Indebtedness merely because it is
unsecured.
 
     The Company may not pay principal of, premium (if any) or interest on, the
Notes or make any deposit pursuant to the provisions described under
"Defeasance" below and may not repurchase, redeem or otherwise retire any Notes
(collectively, "pay the Notes") if (i) any Designated Senior Indebtedness is not
paid when due or (ii) any other default on Designated Senior Indebtedness occurs
and the maturity of such Designated Senior Indebtedness is accelerated in
accordance with its terms unless, in either case, the default has been cured or
waived and any such acceleration has been rescinded or such Designated Senior
Indebtedness has been paid in full. However, the Company may pay the Notes
without regard to the foregoing if the Company and the Trustee receive written
notice approving such payment from the Representative of the Designated Senior
Indebtedness with respect to which either of the events set forth in clause (i)
or (ii) of the immediately preceding sentence has occurred and is continuing.
During the continuance of any default (other than a default described in clause
(i) or (ii) of the second preceding sentence) with respect to any Designated
Senior Indebtedness pursuant to which the maturity thereof may be accelerated
immediately without further notice (except such notice as may be required to
effect such acceleration) or the expiration of any applicable grace periods, the
Company may not pay the Notes for a period (a "Payment Blockage Period")
commencing upon the receipt by the Trustee (with a copy to the Company) of
written notice (a "Blockage Notice") of such default from the Representative of
the holders of such Designated Senior Indebtedness specifying an election to
effect a Payment Blockage Period and ending 179 days thereafter (or earlier if
such Payment Blockage Period is terminated (i) by written notice to the Trustee
and the Company from the Person or Persons who gave such Blockage Notice, (ii)
because the default giving rise to such Blockage Notice is no longer continuing
or (iii) because such Designated Senior Indebtedness has been repaid in full).
Notwithstanding the provisions described in the immediately preceding sentence
(but subject to the provisions described in the first sentence of this
paragraph), unless the holders of such Designated Senior Indebtedness or the
Representative of such holders have accelerated the maturity of such Designated
Senior Indebtedness, the Company may resume payments on the Notes after the end
of such Payment Blockage Period. The Notes shall not be subject to more than one
Payment Blockage Period in any consecutive 360-day period, irrespective of the
number of defaults with respect to Designated Senior Indebtedness during such
period.
 
     Upon any payment or distribution of the assets of the Company upon a total
or partial liquidation or dissolution or reorganization of or similar proceeding
relating to the Company or its property, the holders of Senior Indebtedness will
be entitled to receive payment in full of such Senior Indebtedness before the
Noteholders are entitled to receive any payment, and until the Senior
Indebtedness is paid in full, any payment or distribution to which Noteholders
would be entitled but for the subordination provisions of the Indenture will be
made to holders of such Senior Indebtedness as their interests may appear. If a
distribution is made to Noteholders that, due to the subordination provisions,
should not have been made to them, such Noteholders are required to hold it in
trust for the holders of Senior Indebtedness and pay it over to them as their
interests may appear.
 
     If payment of the Notes is accelerated because of an Event of Default, the
Company or the Trustee shall promptly notify the holders of Designated Senior
Indebtedness or the Representative of such holders of the acceleration.
 
     By reason of the subordination provisions contained in the Indenture, in
the event of insolvency, creditors of the Company who are holders of Senior
Indebtedness may recover more, ratably, than the Noteholders, and creditors of
the Company who are not holders of Senior Indebtedness may recover less,
ratably, than holders of Senior Indebtedness and may recover more, ratably, than
the Noteholders.
 
     The terms of the subordination provisions described above will not apply to
payments from money or the proceeds of U.S. Government Obligations held in trust
by the Trustee for the payment of principal of and interest on the Notes
pursuant to the provisions described under "-- Defeasance."
 
                                       82
<PAGE>   87
 
BOOK-ENTRY, DELIVERY AND FORM
 
     The Existing Notes were, and the Exchange Notes will be, issued in the form
of a Global Note. The Global Note is deposited with, or on behalf of, the
Depositary and registered in the name of the Depositary or its nominee. Except
as set forth below, the Global Note may be transferred, in whole and not in
part, only to the Depositary or another nominee of the Depositary. Investors may
hold their beneficial interests in the Global Note directly through the
Depositary if they have an account with the Depositary or indirectly through
organizations which have accounts with the Depositary.
 
     Upon the transfer of a Note in definitive form, such Note will, unless the
Global Note has previously been exchanged for Notes in definitive form, be
exchanged for an interest in the Global Note representing the principal amount
of Notes being transferred.
 
     The Depositary has advised the Company as follows: The Depositary is a
limited-purpose trust company and organized under the laws of the State of New
York, a member of the Federal Reserve System, a "clearing corporation" within
the meaning of the New York Uniform Commercial Code, and "a clearing agency"
registered pursuant to the provisions of Section 17A of the Exchange Act. The
Depositary was created to hold securities of institutions that have accounts
with the Depositary ("participants") and to facilitate the clearance and
settlement of securities transactions among its participants in such securities
through electronic book-entry changes in accounts of the participants, thereby
eliminating the need for physical movement of securities certificates. The
Depositary's participants include securities brokers and dealers (which may
include the Initial Purchasers), banks, trust companies, clearing corporations
and certain other organizations. Access to the Depositary's book-entry system is
also available to others such as banks, brokers, dealers and trust companies
that clear through or maintain a custodial relationship with a participant,
whether directly or indirectly.
 
     Upon the issuance of the Global Note, the Depositary will credit, on its
book-entry registration and transfer system, the principal amount of the Notes
represented by such Global Note to the accounts of participants. The accounts to
be credited shall be designated by the Initial Purchasers of such Notes.
Ownership of beneficial interests in the Global Note will be limited to
participants or persons that may hold interests through participants. Ownership
of beneficial interests in the Global Note will be shown on, and the transfer of
those ownership interests will be effected only through, records maintained by
the Depositary (with respect to participants' interest) and such participants
(with respect to the owners of beneficial interests in the Global Note other
than participants). The laws of some jurisdictions may require that certain
purchasers of securities take physical delivery of such securities in definitive
form. Such limits and laws may impair the ability to transfer or pledge
beneficial interests in the Global Note.
 
     So long as the Depositary, or its nominee, is the registered holder and
owner of the Global Note, the Depositary or such nominee, as the case may be,
will be considered the sole legal owner and holder of the related Notes for all
purposes of such Notes and the Indenture. Except as set forth below, owners of
beneficial interests in the Global Note will not be entitled to have the Notes
represented by the Global Note registered in their names, will not receive or be
entitled to receive physical delivery of certificated Notes in definitive form
and will not be considered to be the owners or holders of any Notes under the
Global Note. The Company understands that under existing industry practice, in
the event an owner of a beneficial interest in the Global Note desires to take
any action that the Depositary, as the holder of the Global Note, is entitled to
take, the Depositary would authorize the participants to take such action, and
that the participants would authorize beneficial owners owning through such
participants to take such action or would otherwise act upon the instructions of
beneficial owners owning through them.
 
     Payment of principal of and interest on Notes represented by the Global
Note registered in the name of and held by the Depositary or its nominee will be
made to the Depositary or its nominee, as the case may be, as the registered
owner and holder of the Global Note.
 
     The Company expects that the Depositary or its nominee, upon receipt of any
payment of principal of or interest on the Global Note, will credit
participants' accounts with payments in amounts proportionate to their
respective beneficial interests in the principal amount of the Global Note as
shown on the records of the
 
                                       83
<PAGE>   88
 
Depositary or its nominee. The Company also expects that payments by
participants to owners of beneficial interests in the Global Note held through
such participants will be governed by standing instructions and customary
practices and will be the responsibility of such participants. The Company will
not have any responsibility or liability for any aspect of the records relating
to, or payments made on account of, beneficial ownership interests in the Global
Note for any Note or for maintaining, supervising or reviewing any records
relating to such beneficial ownership interests or for any other aspect of the
relationship between the Depositary and its participants or the relationship
between such participants and the owners of beneficial interests in the Global
Note owning through such participants.
 
     Unless and until it is exchanged in whole or in part for certificated Notes
in definitive form, the Global Note may not be transferred except as a whole by
the Depositary to a nominee of such Depositary or by a nominee of such
Depositary to such Depositary or another nominee of such Depositary.
 
     Although the Depositary has agreed to the foregoing procedures in order to
facilitate transfers of interests in the Global Note among participants of the
Depositary, it is under no obligation to perform or continue to perform such
procedures, and such procedures may be discontinued at any time. Neither the
Trustee nor the Company will have any responsibility for the performance by the
Depositary or its participants or indirect participants of their respective
obligations under the rules and procedures governing their operations.
 
CERTIFICATED NOTES
 
     The Notes represented by the Global Note are exchangeable for certificated
Notes in definitive form of like tenor as such Notes in denominations of U.S.
$1,000 and integral multiples thereof if (i) the Depositary notifies the Company
that it is unwilling or unable to continue as Depositary for the Global Note or
if at any time the Depositary ceases to be a clearing agency registered under
the Exchange Act and a successor Depositary is not appointed by the Company
within 90 days, (ii) the Company in its discretion at any time determines not to
have all of the Notes represented by the Global Note or (iii) an Event of
Default has occurred and is continuing. Any Note that is exchangeable pursuant
to the preceding sentence is exchangeable for certificated Notes issuable in
authorized denominations and registered in such names as the Depositary shall
direct. Subject to the foregoing, the Global Note is not exchangeable, except
for a Global Note of the same aggregate denomination to be registered in the
name of the Depositary or its nominee. In addition, such certificates will bear
the legend referred to under "Transfer Restrictions" (unless the Company
determines otherwise in accordance with applicable law) subject, with respect to
such Notes, to the provisions of such legend.
 
SAME-DAY PAYMENT
 
     The Indenture requires that payments in respect of Notes (including
principal, premium and interest) be made by wire transfer of immediately
available funds to the accounts specified by the holders thereof or, if no such
account is specified, by mailing a check to each such holder's registered
address.
 
CHANGE OF CONTROL
 
     Upon the occurrence of any of the following events (each a "Change of
Control"), each Holder shall have the right to require that the Company
repurchase such Holder's Notes at a purchase price in cash equal to 101% of the
principal amount thereof plus accrued and unpaid interest, if any, to the date
of purchase (subject to the right of holders of record on the relevant record
date to receive interest due on the relevant interest payment date):
 
          (i) prior to the first public offering of common stock of the Company,
     the Permitted Holders cease to be the "beneficial owner" (as defined in
     Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, of a
     majority in the aggregate of the total voting power of the Voting Stock of
     the Company, whether as a result of issuance of securities of the Company,
     any merger, consolidation, liquidation or dissolution of the Company, any
     direct or indirect transfer of securities or otherwise (for purposes of
     this clause (i) and clause (ii) below, the Permitted Holders shall be
     deemed to beneficially own any Voting Stock of any Person (the "specified
     entity") held by any other Person (the "parent entity") so long as the
                                       84
<PAGE>   89
 
     Permitted Holders beneficially own (as so defined), directly or indirectly,
     in the aggregate a majority of the voting power of the Voting Stock of the
     parent entity);
 
          (ii) following the first public offering of common stock of the
     Company, any "person" (as such term is used in Sections 13(d) and 14(d) of
     the Exchange Act), other than one or more Permitted Holders, is or becomes
     the beneficial owner (as defined in clause (i) above, except that for
     purposes of this clause (ii) such person shall be deemed to have
     "beneficial ownership" of all shares that any such person has the right to
     acquire, whether such right is exercisable immediately or only after the
     passage of time), directly or indirectly, of more than 40% of the total
     voting power of the Voting Stock of the Company; provided, however, that
     the Permitted Holders beneficially own (as defined in clause (i) above),
     directly or indirectly, in the aggregate a lesser percentage of the total
     voting power of the Voting Stock of the Company than such other person and
     do not have the right or ability by voting power, contract or otherwise to
     elect or designate for election a majority of the Board of Directors (for
     the purposes of this clause (ii), such other person shall be deemed to
     beneficially own any Voting Stock of a specified entity held by a parent
     entity, if such other person is the beneficial owner (as defined in this
     clause (ii)), directly or indirectly, of more than 40% of the voting power
     of the Voting Stock of such parent entity and the Permitted Holders
     beneficially own (as defined in clause (i) above), directly or indirectly,
     in the aggregate a lesser percentage of the voting power of the Voting
     Stock of such parent entity and do not have the right or ability by voting
     power, contract or otherwise to elect or designate for election a majority
     of the board of directors of such parent entity);
 
          (iii) during any period of two consecutive years, individuals who at
     the beginning of such period constituted the Board of Directors (together
     with any new directors whose election by such Board of Directors or whose
     nomination for election by the shareholders of the Company was approved by
     a vote of a majority of the directors of the Company then still in office
     who were either directors at the beginning of such period or whose election
     or nomination for election was previously so approved) cease for any reason
     to constitute a majority of the Board of Directors then in office;
 
          (iv) the adoption of a plan relating to the liquidation or dissolution
     of the Company; or
 
          (v) the merger or consolidation of the Company with or into another
     Person or the merger of another Person with or into the Company, or the
     sale of all or substantially all the assets of the Company to another
     Person (other than a Person that is controlled by the Permitted Holders),
     and, in the case of any such merger or consolidation, the securities of the
     Company that are outstanding immediately prior to such transaction and
     which represent 100% of the aggregate voting power of the Voting Stock of
     the Company are changed into or exchanged for cash, securities or property,
     unless pursuant to such transaction such securities are changed into or
     exchanged for, in addition to any other consideration, securities of the
     surviving corporation that represent immediately after such transaction, at
     least a majority of the aggregate voting power of the Voting Stock of the
     surviving corporation. The phrase "all or substantially all," as used with
     respect to a sale of assets of the Company has no clearly established
     meaning under New York law (the law governing the Indenture) and is subject
     to judicial interpretation, and accordingly, in certain circumstances,
     there may be a degree of uncertainty in ascertaining whether a particular
     transaction would involve a disposition of "all or substantially all" of
     the assets of the Company and therefore it may be unclear whether a Change
     of Control has occurred.
 
     Within 30 days following any Change of Control, the Company shall mail a
notice to each Holder with a copy to the Trustee (the "Change of Control Offer")
stating: (1) that a Change of Control has occurred and that such Holder has the
right to require the Company to purchase such Holder's Notes at a purchase price
in cash equal to 101% of the principal amount thereof plus accrued and unpaid
interest, if any, to the date of purchase (subject to the right of holders of
record on the relevant record date to receive interest on the relevant interest
payment date); (2) the circumstances and relevant facts regarding such Change of
Control (including information with respect to pro forma historical income, cash
flow and capitalization after giving effect to such Change of Control); (3) the
repurchase date (which shall be no earlier than 30 days nor later than 60 days
from the date such notice is mailed); and (4) the instructions determined by the
Company,
 
                                       85
<PAGE>   90
 
consistent with the covenant described hereunder, that a Holder must follow in
order to have its Notes purchased.
 
     The Company will not be required to make a Change of Control Offer upon a
Change of Control if a third party makes the Change of Control Offer in the
manner, at the times and otherwise in compliance with the requirements set forth
in the Indenture applicable to a Change of Control Offer made by the Company and
purchases all Notes validly tendered and not withdrawn under such Change of
Control Offer.
 
     The Company shall comply, to the extent applicable, with the requirements
of Section 14(e) of the Exchange Act and any other securities laws or
regulations in connection with the repurchase of Notes pursuant to this covenant
described hereunder. To the extent that the provisions of any securities laws or
regulations conflict with the provisions of the covenant described hereunder,
the Company shall comply with the applicable securities laws and regulations and
shall not be deemed to have breached its obligations under the covenant
described hereunder by virtue thereof.
 
     The Change of Control purchase feature is a result of negotiations between
the Company and the Initial Purchasers. Management has no present intention to
engage in a transaction involving a Change of Control, although it is possible
that the Company would decide to do so in the future. Subject to the limitations
discussed below, the Company could, in the future, enter into certain
transactions, including acquisitions, refinancings or other recapitalizations,
that would not constitute a Change of Control under the Indenture, but that
could increase the amount of indebtedness outstanding at such time or otherwise
affect the Company's capital structure or credit ratings. Restrictions on the
ability of the Company to incur additional Indebtedness are contained in the
covenant described under "-- Certain Covenants -- Limitation on Indebtedness".
Such restrictions can only be waived with the consent of the holders of a
majority in principal amount of the Notes then outstanding. Except for the
limitations contained in such covenants, however, the Indenture will not contain
any covenants or provisions that may afford holders of the Notes protection in
the event of a highly leveraged transaction.
 
     The Credit Agreement will prohibit the Company from purchasing any Notes
and will also provide that the occurrence of certain change of control events
with respect to the Company would constitute a default thereunder. In the event
a Change of Control occurs at a time when the Company is prohibited from
purchasing Notes, the Company could seek the consent of its lenders to the
purchase of Notes or could attempt to refinance the borrowings that contain such
prohibition. If the Company does not obtain such a consent or repay such
borrowings, the Company will remain prohibited from purchasing Notes. In such
case, the Company's failure to purchase tendered Notes would constitute an Event
of Default under the Indenture which would, in turn, constitute a default under
the Credit Agreement. In such circumstances, the subordination provisions in the
Indenture would likely restrict payment to the Holders of Notes.
 
     Future indebtedness of the Company may contain prohibitions on the
occurrence of certain events that would constitute a Change of Control or
require such indebtedness to be repurchased upon a Change of Control. Moreover,
the exercise by the holders of their right to require the Company to repurchase
the Notes could cause a default under such indebtedness, even if the Change of
Control itself does not, due to the financial effect of such repurchase on the
Company. Finally, the Company's ability to pay cash to the holders of Notes
following the occurrence of a Change of Control may be limited by the Company's
then existing financial resources. There can be no assurance that sufficient
funds will be available when necessary to make any required repurchases. The
provisions under the Indenture relative to the Company's obligation to make an
offer to repurchase the Notes as a result of a Change of Control may be waived
or modified with the written consent of the holders of a majority in principal
amount of the Notes.
 
CERTAIN COVENANTS
 
     The Indenture contains covenants including, among others, the following:
 
     Limitation on Indebtedness. (a) The Company shall not, and shall not permit
any Restricted Subsidiary to, Incur, directly or indirectly, any Indebtedness;
provided, however, that the Company may Incur Indebtedness if, on the date of
such Incurrence and after giving effect thereto, the Consolidated Coverage Ratio
exceeds 2.00 to 1 if such Indebtedness is Incurred prior to January 1, 2000,
2.25 to 1 if such
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<PAGE>   91
 
Indebtedness is Incurred on or after January 1, 2000 and prior to July 1, 2001
or 2.50 to 1 if such Indebtedness is incurred thereafter.
 
     (b) Notwithstanding the foregoing paragraph (a), the Company and the
Restricted Subsidiaries may Incur any or all of the following Indebtedness:
 
          (1) Indebtedness Incurred pursuant to the Credit Agreement; provided,
     however, that, after giving effect to any such Incurrence, the aggregate
     principal amount of such Indebtedness then outstanding does not exceed the
     greater of (i) $45.0 million less the sum of all principal payments with
     respect to such Indebtedness pursuant to paragraph (a)(ii)(A) of the
     covenant described under "-- Limitation on Sales of Assets and Subsidiary
     Stock" and (ii) the sum of (x) 50% of the book value of the inventory of
     the Company and its Restricted Subsidiaries (other than any Foreign
     Subsidiary that has Indebtedness then outstanding Incurred pursuant to
     clause (3) below) and (y) 85% of the book value of the accounts receivable
     of the Company and its Restricted Subsidiaries (other than any Foreign
     Subsidiary that has Indebtedness then outstanding Incurred pursuant to
     clause (3) below);
 
          (2) Indebtedness owed to and held by the Company or a Wholly Owned
     Subsidiary; provided, however, that (i) any subsequent issuance or transfer
     of any Capital Stock which results in any such Wholly Owned Subsidiary
     ceasing to be a Wholly Owned Subsidiary or any subsequent transfer of such
     Indebtedness (other than to the Company or a Wholly Owned Subsidiary) shall
     be deemed, in each case, to constitute the Incurrence of such Indebtedness
     by the obligor thereon and (ii) if the Company is the obligor on such
     Indebtedness, such Indebtedness is expressly subordinated to the prior
     payment in full in cash of all obligations with respect to the Notes;
 
          (3) Indebtedness of Foreign Subsidiaries in an aggregate principal
     amount that, when taken together with the principal amount of all other
     Indebtedness Incurred pursuant to this clause (3) (and any Indebtedness
     Incurred by Foreign Subsidiaries prior to the Issue Date solely to finance
     its working capital) and then outstanding does not exceed the sum of (i)
     60% of the book value of the inventory of Foreign Subsidiaries that have
     Indebtedness Incurred pursuant to this clause (3) then outstanding and (ii)
     85% of the book value of the accounts receivable of Foreign Subsidiaries
     that have Indebtedness Incurred pursuant to this clause (3) then
     outstanding;
 
          (4) the Notes and the Exchange Notes;
 
          (5) Indebtedness outstanding on the Issue Date (other than
     Indebtedness described in clause (1), (2), (3) or (4) of this covenant);
 
          (6) Indebtedness of a Subsidiary Incurred and outstanding on or prior
     to the date on which such Subsidiary was acquired by the Company (other
     than Indebtedness Incurred in connection with, or to provide all or any
     portion of the funds or credit support utilized to consummate, the
     transaction or series of related transactions pursuant to which such
     Subsidiary became a Subsidiary or was acquired by the Company); provided,
     however, that on the date of such acquisition and after giving effect
     thereto, the Company would have been able to Incur at least $1.00 of
     additional Indebtedness pursuant to clause (a);
 
          (7) Refinancing Indebtedness in respect of Indebtedness Incurred
     pursuant to paragraph (a) or pursuant to clause (4), (5) or (6) or this
     clause (7); provided, however, that to the extent such Refinancing
     Indebtedness directly or indirectly Refinances Indebtedness of a Subsidiary
     Incurred pursuant to clause (6), such Refinancing Indebtedness shall be
     Incurred only by such Subsidiary;
 
          (8) Hedging Obligations consisting of Interest Rate Agreements
     directly related to Indebtedness permitted to be Incurred by the Company
     pursuant to the Indenture;
 
          (9) Indebtedness arising from agreements of the Company or a
     Restricted Subsidiary providing for indemnification, adjustment of purchase
     price or similar obligations, in each case, incurred or assumed in
     connection with the disposition of any business, assets or a Subsidiary,
     other than guarantees of Indebtedness incurred by any Person acquiring all
     or any portion of such business, assets or a Subsidiary for the purpose of
     financing such acquisition; provided, however, that the maximum assumable
     liability in
 
                                       87
<PAGE>   92
 
     respect of all such Indebtedness shall at no time exceed the gross proceeds
     actually received by the Company and its Restricted Subsidiaries in
     connection with such disposition;
 
          (10) Indebtedness arising from the honoring by a bank or other
     financial institution of a check, draft or similar instrument inadvertently
     (except in the case of daylight overdrafts) drawn against insufficient
     funds in the ordinary course of business; provided, however, that such
     Indebtedness is extinguished within two business days of incurrence;
 
          (11) Incurrence by the Company or any of its Restricted Subsidiaries
     of Indebtedness represented by Capital Lease Obligations, mortgage
     financings or purchase money obligations, in each case incurred for the
     purpose of financing all or any part of the purchase price or cost of
     construction or improvement of property, plant or equipment used in the
     business of the Company or any such Restricted Subsidiaries in an aggregate
     principal amount not to exceed the greater of (a) $20 million or (b) 5% of
     the Consolidated Net Worth of the Company at any one time outstanding;
 
          (12) Indebtedness of the Company consisting of Guarantees of
     Indebtedness of a Foreign Subsidiary Incurred pursuant to clause (3) above;
 
          (13) Indebtedness in respect of performance bonds and surety or appeal
     bonds entered into by the Company and its Restricted Subsidiaries in the
     ordinary course of their business and letters of credit entered into in the
     ordinary course of business by the Company and its Restricted Subsidiaries
     to secure such performance bonds or surety or appeal bonds to the extent
     such letters of credit are not drawn upon or, if and to the extent drawn
     upon, such drawing is reimbursed no later than the 30th Business Day
     following payment on such letter of credit; and
 
          (14) Indebtedness in an aggregate principal amount which, together
     with all other Indebtedness of the Company outstanding on the date of such
     Incurrence (other than Indebtedness permitted by clauses (1) through (13)
     above or paragraph (a)) does not exceed $10 million.
 
     (c) Notwithstanding the foregoing, the Company shall not Incur any
Indebtedness pursuant to the foregoing paragraph (b) if the proceeds thereof are
used, directly or indirectly, to Refinance any Subordinated Obligations unless
such Indebtedness shall be subordinated to the Notes to at least the same extent
as such Subordinated Obligations.
 
     (d) For purposes of determining compliance with the foregoing covenant,
(i) in the event that an item of Indebtedness meets the criteria of more than
one of the types of Indebtedness described above, the Company, in its sole
discretion, will classify such item of Indebtedness and only be required to
include the amount and type of such Indebtedness in one of the above clauses and
(ii) an item of Indebtedness may be divided and classified in more than one of
the types of Indebtedness described above.
 
     (e) Notwithstanding paragraphs (a) and (b) above, the Company shall not
Incur (i) any Indebtedness if such Indebtedness is subordinate or junior in
ranking in any respect to any Senior Indebtedness, unless such Indebtedness is
Senior Subordinated Indebtedness or is expressly subordinated in right of
payment to Senior Subordinated Indebtedness or (ii) any Secured Indebtedness
that is not Senior Indebtedness unless contemporaneously therewith effective
provision is made to secure the Notes equally and ratably with such Secured
Indebtedness for so long as such Secured Indebtedness is secured by a Lien.
 
     Limitation on Restricted Payments. (a) The Company shall not, and shall not
permit any Restricted Subsidiary, directly or indirectly, to make a Restricted
Payment if at the time the Company or such Restricted Subsidiary makes such
Restricted Payment: (1) a Default shall have occurred and be continuing (or
would result therefrom); (2) the Company is not able to Incur an additional
$1.00 of Indebtedness pursuant to paragraph (a) of the covenant described under
"-- Limitation on Indebtedness;" or (3) the aggregate amount of such Restricted
Payment and all other Restricted Payments since the Issue Date would exceed the
sum of:
 
          (A) 50% of the Consolidated Net Income accrued during the period
     (treated as one accounting period) from the beginning of the fiscal quarter
     immediately following the fiscal quarter during which the Notes are
     originally issued to the end of the most recent fiscal quarter ending at
     least 45 days prior to the date of such Restricted Payment (or, in case
     such Consolidated Net Income shall be a deficit, minus 100% of such
     deficit);
 
                                       88
<PAGE>   93
 
          (B) the aggregate Net Cash Proceeds received by the Company from the
     issuance or sale of its Capital Stock (other than Disqualified Stock)
     subsequent to the Issue Date (other than an issuance or sale to a
     Subsidiary of the Company and other than an issuance or sale to an employee
     stock ownership plan or to a trust established by the Company or any of its
     Subsidiaries for the benefit of their employees);
 
          (C) the amount by which Indebtedness of the Company is reduced on the
     Company's balance sheet upon the conversion or exchange (other than by a
     Subsidiary of the Company) subsequent to the Issue Date of any Indebtedness
     of the Company convertible or exchangeable for Capital Stock (other than
     Disqualified Stock) of the Company (less the amount of any cash, or the
     fair value of any other property, distributed by the Company upon such
     conversion or exchange); and
 
          (D) an amount equal to the sum of (i) the net reduction in Investments
     in Unrestricted Subsidiaries resulting from dividends, repayments of loans
     or advances or other transfers of assets, in each case to the Company or
     any Restricted Subsidiary from Unrestricted Subsidiaries, and (ii) the
     portion (proportionate to the Company's equity interest in such Subsidiary)
     of the fair market value of the net assets of an Unrestricted Subsidiary at
     the time such Unrestricted Subsidiary is designated a Restricted
     Subsidiary; provided, however,that the foregoing sum shall not exceed, in
     the case of any Unrestricted Subsidiary, the amount of Investments
     previously made (and treated as a Restricted Payment) by the Company or any
     Restricted Subsidiary in such Unrestricted Subsidiary.
 
          (b) The provisions of the foregoing paragraph (a) shall not prohibit:
 
             (i) any Restricted Payments made out of the proceeds of the
        substantially concurrent sale of, or made by exchange for, Capital Stock
        of the Company (other than Disqualified Stock and other than Capital
        Stock issued or sold to a Subsidiary of the Company or an employee stock
        ownership plan or to a trust established by the Company or any of its
        Subsidiaries for the benefit of their employees); provided, however,
        that (A) such Restricted Payment shall be excluded in the calculation of
        the amount of Restricted Payments and (B) the Net Cash Proceeds from
        such sale shall be excluded from the calculation of amounts under clause
        (3)(B) of paragraph (a) above;
 
             (ii) any purchase, repurchase, redemption, defeasance or other
        acquisition or retirement for value of Subordinated Obligations made by
        exchange for, or out of the proceeds of the substantially concurrent
        sale of, Indebtedness of the Company which is permitted to be Incurred
        pursuant to the covenant described under "-- Limitation on
        Indebtedness;" provided, however, that such purchase, repurchase,
        redemption, defeasance or other acquisition or retirement for value
        shall be excluded in the calculation of the amount of Restricted
        Payments;
 
             (iii) dividends paid within 60 days after the date of declaration
        thereof if at such date of declaration such dividend would have complied
        with this covenant; provided, however, that at the time of payment of
        such dividend, no other Default shall have occurred and be continuing
        (or result therefrom); provided further, however, that such dividend
        shall be included in the calculation of the amount of Restricted
        Payments;
 
             (iv) the repurchase or other acquisition of shares of, or options
        to purchase shares of, common stock of the Company or any of its
        Subsidiaries from employees, former employees, directors or former
        directors of the Company or any of its Subsidiaries (or permitted
        transferees of such employees, former employees, directors or former
        directors), pursuant to the terms of the agreements (including
        employment agreements) or plans (or amendments thereto) approved by the
        Board of Directors under which such individuals purchase or sell or are
        granted the option to purchase or sell, shares of such common stock;
        provided, however, that the aggregate amount of such repurchases and
        other acquisitions shall not exceed $1 million in any calendar year;
        provided further, however, that such repurchases and other acquisitions
        shall be excluded in the calculation of the amount of Restricted
        Payments;
 
                                       89
<PAGE>   94
 
             (v) the repurchase of shares of Series A Preferred Stock (and the
        payment of accrued dividends thereon); provided, however, that any such
        repurchase shall be excluded in the calculation of the amount of
        Restricted Payments; or
 
             (vi) the repurchase of shares of Series B Preferred Stock (and the
        payment of accumulated dividends thereon) if on the date of any such
        repurchase and after giving effect thereto, the Consolidated Coverage
        Ratio exceeds 2.00 to 1; provided, however, that any such repurchase
        shall be included in the calculation of the amount of Restricted
        Payments.
 
     Limitation on Restrictions on Distributions from Restricted Subsidiaries.
The Company shall not, and shall not permit any Restricted Subsidiary to, create
or otherwise cause or permit to exist or become effective any consensual
encumbrance or restriction on the ability of any Restricted Subsidiary to (a)
pay dividends or make any other distributions on its Capital Stock to the
Company or a Restricted Subsidiary or pay any Indebtedness owed to the Company,
(b) make any loans or advances to the Company or (c) transfer any of its
property or assets to the Company, except:
 
          (i) any encumbrance or restriction pursuant to an agreement in effect
     at or entered into on the Issue Date;
 
          (ii) any encumbrance or restriction with respect to a Restricted
     Subsidiary pursuant to an agreement relating to any Indebtedness Incurred
     by such Restricted Subsidiary on or prior to the date on which such
     Restricted Subsidiary was acquired by the Company (other than Indebtedness
     Incurred as consideration in, or to provide all or any portion of the funds
     or credit support utilized to consummate, the transaction or series of
     related transactions pursuant to which such Restricted Subsidiary became a
     Restricted Subsidiary or was acquired by the Company) and outstanding on
     such date;
 
          (iii) any encumbrance or restriction pursuant to an agreement
     evidencing Indebtedness Incurred without violation of the Indenture or
     effecting a Refinancing of Indebtedness Incurred pursuant to an agreement
     referred to in clause (i) or (ii) of this covenant or this clause (iii) or
     contained in any amendment to an agreement referred to in clause (i) or
     (ii) of this covenant or this clause (iii); provided, however, that the
     encumbrances and restrictions with respect to such Restricted Subsidiary
     contained in any such agreement, refinancing agreement or amendment are no
     less favorable to the Noteholders than encumbrances and restrictions with
     respect to such Restricted Subsidiary contained in such predecessor
     agreements;
 
          (iv) any such encumbrance or restriction consisting of customary
     nonassignment provisions in leases governing leasehold interests to the
     extent such provisions restrict the transfer of the lease or the property
     leased thereunder;
 
          (v) in the case of clause (c) above, restrictions contained in
     security agreements or mortgages securing Indebtedness of a Restricted
     Subsidiary to the extent such restrictions restrict the transfer of the
     property subject to such security agreements or mortgages; and
 
          (vi) any restriction with respect to a Restricted Subsidiary imposed
     pursuant to an agreement entered into for the sale or disposition of all or
     substantially all the Capital Stock or assets of such Restricted Subsidiary
     pending the closing of such sale or disposition.
 
     Limitation on Sales of Assets and Subsidiary Stock. (a) The Company shall
not, and shall not permit any Restricted Subsidiary to, directly or indirectly,
consummate any Asset Disposition unless (i) the Company or such Restricted
Subsidiary receives consideration at the time of such Asset Disposition at least
equal to the fair market value (including as to the value of all non-cash
consideration), as determined in good faith by the Board of Directors, of the
shares and assets subject to such Asset Disposition and at least 75% of the
consideration thereof received by the Company or such Restricted Subsidiary is
in the form of cash or cash equivalents and (ii) an amount equal to 100% of the
Net Available Cash from such Asset Disposition is applied by the Company (or
such Restricted Subsidiary, as the case may be) (A) first, to the extent the
Company elects (or is required by the terms of any Indebtedness), to prepay,
repay, redeem or purchase Senior Indebtedness or Indebtedness (other than any
Disqualified Stock) of a Wholly Owned Subsidiary (in
 
                                       90
<PAGE>   95
 
each case other than Indebtedness owed to the Company or an Affiliate of the
Company) within one year from the later of the date of such Asset Disposition or
the receipt of such Net Available Cash; (B) second, to the extent of the balance
of such Net Available Cash after application in accordance with clause (A), to
the extent the Company elects, to acquire Additional Assets within one year from
the later of the date of such Asset Disposition or the receipt of such Net
Available Cash; (C) third, to the extent of the balance of such Net Available
Cash after application in accordance with clauses (A) and (B), to make an offer
to the holders of the Notes (and to holders of other Senior Subordinated
Indebtedness designated by the Company) to purchase Notes (and such other Senior
Subordinated Indebtedness) pursuant to and subject to the conditions contained
in the Indenture; and (D) fourth, to the extent of the balance of such Net
Available Cash after application in accordance with clauses (A), (B) and (C) to
(x) the acquisition by the Company or any Wholly Owned Subsidiary of Additional
Assets or (y) the prepayment, repayment or purchase of Indebtedness (other than
any Disqualified Stock) of the Company (other than Indebtedness owed to an
Affiliate of the Company) or Indebtedness of any Subsidiary (other than
Indebtedness owed to the Company or an Affiliate of the Company), in each case
within one year from the later of the receipt of such Net Available Cash and the
date the offer described in clause (b) below is consummated; provided,
however,that in connection with any prepayment, repayment or purchase of
Indebtedness pursuant to clause (A), (C) or (D) above, the Company or such
Restricted Subsidiary shall permanently retire such Indebtedness and shall cause
the related loan commitment (if any) to be permanently reduced in an amount
equal to the principal amount so prepaid, repaid or purchased. Notwithstanding
the foregoing provisions of this paragraph, the Company and the Restricted
Subsidiaries shall not be required to apply any Net Available Cash in accordance
with this paragraph except to the extent that the aggregate Net Available Cash
from all Asset Dispositions which are not applied in accordance with this
paragraph exceeds $5 million. Pending application of Net Available Cash pursuant
to this covenant, such Net Available Cash shall be invested in Permitted
Investments.
 
     For the purposes of this covenant, the following are deemed to be cash or
cash equivalents: (x) the assumption of Indebtedness of the Company or any
Restricted Subsidiary and the release of the Company or such Restricted
Subsidiary from all liability on such Indebtedness in connection with such Asset
Disposition and (y) securities received by the Company or any Restricted
Subsidiary from the transferee that are promptly converted by the Company or
such Restricted Subsidiary into cash.
 
     (b) In the event of an Asset Disposition that requires the purchase of the
Notes (and other Senior Subordinated Indebtedness) pursuant to clause (a)(ii)(C)
above, the Company will be required to purchase Notes tendered pursuant to an
offer by the Company for the Notes (and other Senior Subordinated Indebtedness)
at a purchase price of 100% of their principal amount (without premium) plus
accrued but unpaid interest (or, in respect of such other Senior Subordinated
Indebtedness, such lesser price, if any, as may be provided for by the terms of
such Senior Subordinated Indebtedness) in accordance with the procedures
(including prorating in the event of oversubscription) set forth in the
Indenture. If the aggregate purchase price of Notes (and any other Senior
Subordinated Indebtedness) tendered pursuant to such offer is less than the Net
Available Cash allotted to the purchase thereof, the Company will be required to
apply the remaining Net Available Cash in accordance with clause (a)(ii)(D)
above. The Company shall not be required to make such an offer to purchase Notes
(and other Senior Subordinated Indebtedness) pursuant to this covenant if the
Net Available Cash available therefor is less than $5 million (which lesser
amount shall be carried forward for purposes of determining whether such an
offer is required with respect to the Net Available Cash from any subsequent
Asset Disposition).
 
     (c) The Company shall comply, to the extent applicable, with the
requirements of Section 14(e) of the Exchange Act and any other securities laws
or regulations in connection with the repurchase of Notes pursuant to this
covenant. To the extent that the provisions of any securities laws or
regulations conflict with provisions of this covenant, the Company shall comply
with the applicable securities laws and regulations and shall not be deemed to
have breached its obligations under this clause by virtue thereof.
 
     Limitation on Affiliate Transactions. (a) The Company shall not, and shall
not permit any Restricted Subsidiary to, enter into or permit to exist any
transaction (including the purchase, sale, lease or exchange of any property,
employee compensation arrangements or the rendering of any service) with any
Affiliate of the Company (an "Affiliate Transaction") unless the terms thereof
(1) are no less favorable to the Company or
                                       91
<PAGE>   96
 
such Restricted Subsidiary than those that could be obtained at the time of such
transaction in arm's-length dealings with a Person who is not such an Affiliate,
(2) if such Affiliate Transaction involves an amount in excess of $2 million,
(i) are set forth in writing and (ii) have been approved by a majority of the
members of the Board of Directors having no personal stake in such Affiliate
Transaction and (3) if such Affiliate Transaction involves an amount in excess
of $10 million, have been determined by a nationally recognized investment
banking firm to be fair, from a financial standpoint, to the Company and its
Restricted Subsidiaries.
 
     (b) The provisions of the foregoing paragraph (a) shall not prohibit
(i) any Restricted Payment permitted to be paid pursuant to the covenant
described under "-- Limitation on Restricted Payments," (ii) any issuance of
securities, or other payments, awards or grants in cash, securities or otherwise
pursuant to, or the funding of, employment arrangements, stock options and stock
ownership plans approved by the Board of Directors, (iii) the grant of stock
options or similar rights to employees and directors of the Company pursuant to
plans approved by the Board of Directors, (iv) loans or advances to employees in
the ordinary course of business in accordance with the past practices of the
Company or its Restricted Subsidiaries, but in any event not to exceed $1
million in the aggregate outstanding at any one time, (v) the payment of
reasonable fees to directors of the Company and its Restricted Subsidiaries who
are not employees of the Company or its Restricted Subsidiaries, (vi) any
Affiliate Transaction between the Company and a Wholly Owned Subsidiary or
between Wholly Owned Subsidiaries, (vii) the payment by the Company (A) of
customary annual management fees and related expenses to WEP and (B) of fees
paid to WEP, J. H. Whitney & Co., or an affiliate of J. H. Whitney & Co.
pursuant to any financing, underwriting or placement agreement, or in respect of
other investment banking activities, in each case as determined by the Board of
Directors in good faith and (viii) the issuance or sale of any Capital Stock
(other than Disqualified Stock) of the Company.
 
     Limitation on the Sale or Issuance of Capital Stock of Restricted
Subsidiaries. The Company shall not sell or otherwise dispose of any Capital
Stock of a Restricted Subsidiary, and shall not permit any Restricted
Subsidiary, directly or indirectly, to issue or sell or otherwise dispose of any
of its Capital Stock except (i) to the Company or a Wholly Owned Subsidiary,
(ii) if, immediately after giving effect to such issuance, sale or other
disposition, neither the Company nor any of its Subsidiaries owns any Capital
Stock of such Restricted Subsidiary or (iii) if, immediately after giving effect
to such issuance, sale or other disposition, such Restricted Subsidiary would no
longer constitute a Restricted Subsidiary and any Investment in such Person
remaining after giving effect thereto would have been permitted to be made under
the covenant described under "-- Limitation on Restricted Payments" if made on
the date of such issuance, sale or other disposition.
 
     Merger and Consolidation. The Company shall not consolidate with or merge
with or into, or convey, transfer or lease, in one transaction or a series of
transactions, all or substantially all its assets to, any Person, unless: (i)
the resulting, surviving or transferee Person (the "Successor Company") shall be
a Person organized and existing under the laws of the United States of America,
any State thereof or the District of Columbia and the Successor Company (if not
the Company) shall expressly assume, by an indenture supplemental thereto,
executed and delivered to the Trustee, in form satisfactory to the Trustee, all
the obligations of the Company under the Notes and the Indenture; (ii)
immediately after giving effect to such transaction (and treating any
Indebtedness which becomes an obligation of the Successor Company or any
Subsidiary as a result of such transaction as having been Incurred by such
Successor Company or such Subsidiary at the time of such transaction), no
Default shall have occurred and be continuing; (iii) immediately after giving
effect to such transaction, the Successor Company would be able to Incur an
additional $1.00 of Indebtedness pursuant to paragraph (a) of the covenant
described under "-- Limitation on Indebtedness;" (iv) the Company shall have
delivered to the Trustee an Officers' Certificate and an Opinion of Counsel,
each stating that such consolidation, merger or transfer and such supplemental
indenture (if any) comply with the Indenture and (v) the Company shall have
delivered to the Trustee an Opinion of Counsel to the effect that the Holders
will not recognize income, gain or loss for Federal income tax purposes as a
result of such transaction and will be subject to Federal income tax on the same
amounts, in the same manner and at the same times as would have been the case if
such transaction had not occurred.
 
                                       92
<PAGE>   97
 
     The Successor Company shall be the successor to the Company and shall
succeed to, and be substituted for, and may exercise every right and power of,
the Company under the Indenture, but the predecessor Company in the case of a
conveyance, transfer or lease shall not be released from the obligation to pay
the principal of and interest on the Notes.
 
     SEC Reports. Notwithstanding that the Company may not be subject to the
reporting requirements of Section 13 or 15(d) of the Exchange Act, the Company
shall file with the SEC and provide the Trustee and Noteholders with such annual
reports and such information, documents and other reports as are specified in
Sections 13 and 15(d) of the Exchange Act and applicable to a U.S. corporation
subject to such Sections, such information, documents and other reports to be so
filed and provided at the times specified for the filing of such information,
documents and reports under such Sections.
 
DEFAULTS
 
     An Event of Default is defined in the Indenture as (i) a default in the
payment of interest on the Notes when due, continued for 30 days, (ii) a default
in the payment of principal of any Note when due at its Stated Maturity, upon
optional redemption, upon required repurchase, upon declaration or otherwise,
(iii) the failure by the Company to comply with its obligations under "--
Certain Covenants -- Merger and Consolidation" above, (iv) the failure by the
Company to comply for 30 days after notice with any of its obligations in the
covenants described above under "Change of Control" (other than a failure to
purchase Notes) or under "-- Certain Covenants" under "-- Limitation on
Indebtedness," "-- Limitation on Restricted Payments," "-- Limitation on
Restrictions on Distributions from Restricted Subsidiaries" or "-- Limitation on
Sales of Assets and Subsidiary Stock" (other than a failure to purchase Notes),
"-- Limitation on Affiliate Transactions," "-- Limitation on the Sale or
Issuance of Capital Stock of Restricted Subsidiaries" or "-- SEC Reports," (v)
the failure by the Company to comply for 60 days after notice with its other
agreements contained in the Indenture, (vi) Indebtedness of the Company or any
Significant Subsidiary is not paid within any applicable grace period after
final maturity or is accelerated by the holders thereof because of a default and
the total amount of such Indebtedness unpaid or accelerated exceeds $7.5 million
(the "cross acceleration provision"), (vii) certain events of bankruptcy,
insolvency or reorganization of the Company or a Significant Subsidiary (the
"bankruptcy provisions") or (viii) any judgment or decree for the payment of
money in excess of $7.5 million is entered against the Company or a Significant
Subsidiary, remains outstanding for a period of 60 days following such judgment
and is not discharged, waived or stayed within 10 days after notice (the
"judgment default provision"). However, a default under clauses (iv), (v) and
(viii) will not constitute an Event of Default until the Trustee or the holders
of 25% in principal amount of the outstanding Notes notify the Company of the
default and the Company does not cure such default within the time specified
after receipt of such notice.
 
     If an Event of Default occurs and is continuing, the Trustee or the holders
of at least 25% in principal amount of the outstanding Notes may declare the
principal of and accrued but unpaid interest on all the Notes to be due and
payable. Upon such a declaration, such principal and interest shall be due and
payable immediately. If an Event of Default relating to certain events of
bankruptcy, insolvency or reorganization of the Company occurs and is
continuing, the principal of and interest on all the Notes will ipso facto
become and be immediately due and payable without any declaration or other act
on the part of the Trustee or any holders of the Notes. Under certain
circumstances, the holders of a majority in principal amount of the outstanding
Notes may rescind any such acceleration with respect to the Notes and its
consequences. Subject to the provisions of the Indenture relating to the duties
of the Trustee, in case an Event of Default occurs and is continuing, the
Trustee will be under no obligation to exercise any of the rights or powers
under the Indenture at the request or direction of any of the holders of the
Notes unless such holders have offered to the Trustee reasonable indemnity or
security against any loss, liability or expense. Except to enforce the right to
receive payment of principal, premium (if any) or interest when due, no holder
of a Note may pursue any remedy with respect to the Indenture or the Notes
unless (i) such holder has previously given the Trustee notice that an Event of
Default is continuing, (ii) holders of at least 25% in principal amount of the
outstanding Notes have requested the Trustee to pursue the remedy, (iii) such
holders have offered the Trustee reasonable security or indemnity against any
loss, liability or expense, (iv) the Trustee has not
 
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<PAGE>   98
 
complied with such request within 60 days after the receipt thereof and the
offer of security or indemnity and (v) the holders of a majority in principal
amount of the outstanding Notes have not given the Trustee a direction
inconsistent with such request within such 60-day period. Subject to certain
restrictions, the holders of a majority in principal amount of the outstanding
Notes are given the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee or of exercising any trust or
power conferred on the Trustee. The Trustee, however, may refuse to follow any
direction that conflicts with law or the Indenture or that the Trustee
determines is unduly prejudicial to the rights of any other holder of a Note or
that would involve the Trustee in personal liability.
 
     The Indenture provides that if a Default occurs and is continuing and is
known to the Trustee, the Trustee must mail to each holder of the Notes notice
of the Default within 90 days after it occurs. Except in the case of a Default
in the payment of principal of or interest on any Note, the Trustee may withhold
notice if and so long as a committee of its trust officers determines that
withholding notice is not opposed to the interest of the holders of the Notes.
In addition, the Company is required to deliver to the Trustee, within 120 days
after the end of each fiscal year, a certificate indicating whether the signers
thereof know of any Default that occurred during the previous year. The Company
also is required to deliver to the Trustee, within 30 days after the occurrence
thereof, written notice of any event which would constitute certain Defaults,
their status and what action the Company is taking or proposes to take in
respect thereof.
 
AMENDMENTS AND WAIVERS
 
     Subject to certain exceptions, the Indenture may be amended with the
consent of the holders of a majority in principal amount of the Notes then
outstanding (including consents obtained in connection with a tender offer or
exchange for the Notes) and any past default or compliance with any provisions
may also be waived with the consent of the holders of a majority in principal
amount of the Notes then outstanding. However, without the consent of each
holder of an outstanding Note affected thereby, no amendment may, among other
things, (i) reduce the amount of Notes whose holders must consent to an
amendment, (ii) reduce the rate of or extend the time for payment of interest on
any Note, (iii) reduce the principal of or extend the Stated Maturity of any
Note, (iv) reduce the amount payable upon the redemption of any Note or change
the time at which any Note may be redeemed as described under "-- Optional
Redemption," (v) make any Note payable in money other than that stated in the
Note, (vi) impair the right of any holder of the Notes to receive payment of
principal of and interest on such holder's Notes on or after the due dates
therefor or to institute suit for the enforcement of any payment on or with
respect to such holder's Notes or (vii) make any change in the amendment
provisions which require each holder's consent or in the waiver provisions or
(viii) make any change to the subordination provisions of the Indenture that
would adversely affect the Noteholders.
 
     Without the consent of any holder of the Notes, the Company and Trustee may
amend the Indenture to cure any ambiguity, omission, defect or inconsistency, to
provide for the assumption by a successor corporation of the obligations of the
Company under the Indenture, to provide for uncertificated Notes in addition to
or in place of certificated Notes (provided that the uncertificated Notes are
issued in registered form for purposes of Section 163(f) of the Code, or in a
manner such that the uncertificated Notes are described in Section 163(f)(2)(B)
of the Code), to add guarantees with respect to the Notes, to secure the Notes,
to add to the covenants of the Company for the benefit of the holders of the
Notes or to surrender any right or power conferred upon the Company, to make any
change that does not adversely affect the rights of any holder of the Notes or
to comply with any requirement of the SEC in connection with the qualification
of the Indenture under the Trust Indenture Act. However, no amendment may be
made to the subordination provisions of the Indenture that adversely affect the
rights of any holders of Senior Indebtedness then outstanding unless the holders
of such Senior Indebtedness (or their representative) consent to such change.
 
     The consent of the holders of the Notes is not necessary under the
Indenture to approve the particular form of any proposed amendment. It is
sufficient if such consent approves the substance of the proposed amendment.
 
                                       94
<PAGE>   99
 
     After an amendment under the Indenture becomes effective, the Company is
required to mail to holders of the Notes a notice briefly describing such
amendment. However, the failure to give such notice to all holders of the Notes,
or any defect therein, will not impair or affect the validity of the amendment.
 
DEFEASANCE
 
     The Company at any time may terminate all its obligations under the Notes
and the Indenture ("legal defeasance"), except for certain obligations,
including those respecting the defeasance trust and obligations to register the
transfer or exchange of the Notes, to replace mutilated, destroyed, lost or
stolen Notes and to maintain a registrar and paying agent in respect of the
Notes. The Company at any time may terminate its obligations under "Change of
Control" and under the covenants described under "-- Certain Covenants" (other
than the covenant described under "-- Merger and Consolidation"), the operation
of the cross acceleration provision, the bankruptcy provisions with respect to
Significant Subsidiaries and the judgment default provision described under "--
Defaults" above and the limitations contained in clauses (iii) and (iv) under
"-- Certain Covenants -- Merger and Consolidation" above ("covenant
defeasance").
 
     The Company may exercise its legal defeasance option notwithstanding its
prior exercise of its covenant defeasance option. If the Company exercises its
legal defeasance option, payment of the Notes may not be accelerated because of
an Event of Default with respect thereto. If the Company exercises its covenant
defeasance option, payment of the Notes may not be accelerated because of an
Event of Default specified in clause (iv), (vi), (vii) (with respect only to
Significant Subsidiaries) or (viii) under "-- Defaults" above or because of the
failure of the Company to comply with clause (iii) or (iv) under "-- Certain
Covenants -- Merger and Consolidation" above.
 
     In order to exercise either defeasance option, the Company must irrevocably
deposit in trust (the "defeasance trust") with the Trustee money or U.S.
Government Obligations for the payment of principal and interest on the Notes to
redemption or maturity, as the case may be, and must comply with certain other
conditions, including delivery to the Trustee of an Opinion of Counsel to the
effect that holders of the Notes will not recognize income, gain or loss for
Federal income tax purposes as a result of such deposit and defeasance and will
be subject to Federal income tax on the same amounts and in the same manner and
at the same times as would have been the case if such deposit and defeasance had
not occurred (and, in the case of legal defeasance only, such Opinion of Counsel
must be based on a ruling of the Internal Revenue Service or other change in
applicable Federal income tax law).
 
CONCERNING THE TRUSTEE
 
     United States Trust Company of New York is the Trustee under the Indenture
and has been appointed by the Company as Registrar and Paying Agent with regard
to the Notes.
 
     The Indenture contains certain limitations on the rights of the Trustee,
should it become a creditor of the Company, to obtain payment of claims in
certain cases, or to realize on certain property received in respect of any such
claim as security or otherwise. The Trustee will be permitted to engage in other
transactions; provided, however, if it acquires any conflicting interest it must
eliminate such conflict within 90 days, apply to the SEC for permission to
continue or resign.
 
     The Holders of a majority in principal amount of the outstanding Notes will
have the right to direct the time, method and place of conducting any proceeding
for exercising any remedy available to the Trustee, subject to certain
exceptions. The Indenture provides that if an Event of Default occurs (and is
not cured), the Trustee will be required, in the exercise of its power, to use
the degree of care of a prudent man in the conduct of his own affairs. Subject
to such provisions, the Trustee will be under no obligation to exercise any of
its rights or powers under the Indenture at the request of any Holder of Notes,
unless such Holder shall have offered to the Trustee security and indemnity
satisfactory to it against any loss, liability or expense and then only to the
extent required by the terms of the Indenture.
 
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<PAGE>   100
 
GOVERNING LAW
 
     The Indenture provides that it and the Notes will be governed by, and
construed in accordance with, the laws of the State of New York without giving
effect to applicable principles of conflicts of law to the extent that the
application of the law of another jurisdiction would be required thereby.
 
CERTAIN DEFINITIONS
 
     "Additional Assets" means (i) any property or assets (other than
Indebtedness and Capital Stock) in a Related Business; (ii) the Capital Stock of
a Person that becomes a Restricted Subsidiary as a result of the acquisition of
such Capital Stock by the Company or another Restricted Subsidiary or (iii)
Capital Stock constituting a minority interest in any Person that at such time
is a Restricted Subsidiary; provided, however, that any such Restricted
Subsidiary described in clauses (ii) or (iii) above is primarily engaged in a
Related Business.
 
     "Affiliate" of any specified Person means any other Person, directly or
indirectly, controlling or controlled by or under direct or indirect common
control with such specified Person; provided, however, that the owners of the
Series A Preferred Stock and Series B Preferred Stock on the Issue Date and
their respective Affiliates shall not be considered Affiliates of the Company or
any Restricted Subsidiary solely by virtue of such ownership. For the purposes
of this definition, "control" when used with respect to any Person means the
power to direct the management and policies of such Person, directly or
indirectly, whether through the ownership of voting securities, by contract or
otherwise; and the terms "controlling" and "controlled" have meanings
correlative to the foregoing. For purposes of the provisions described under "--
Certain Covenants -- Limitation on Restricted Payments," "-- Certain Covenants
- -- Limitation on Affiliate Transactions" and "-- Certain Covenants -- Limitation
on Sales of Assets and Subsidiary Stock" only, "Affiliate" shall also mean any
beneficial owner of Capital Stock representing 5% or more of the total voting
power of the Voting Stock (on a fully diluted basis) of the Company or of rights
or warrants to purchase such Capital Stock (whether or not currently
exercisable) and any Person who would be an Affiliate of any such beneficial
owner pursuant to the first sentence hereof.
 
     "Asset Disposition" means any sale, lease, transfer or other disposition
(or series of related sales, leases, transfers or dispositions) by the Company
or any Restricted Subsidiary, including any disposition by means of a merger,
consolidation or similar transaction (each referred to for the purposes of this
definition as a "disposition"), of (i) any shares of Capital Stock of a
Restricted Subsidiary (other than directors' qualifying shares or shares
required by applicable law to be held by a Person other than the Company or a
Restricted Subsidiary), (ii) all or substantially all the assets of any division
or line of business of the Company or any Restricted Subsidiary or (iii) any
other assets of the Company or any Restricted Subsidiary outside of the ordinary
course of business of the Company or such Restricted Subsidiary (other than, in
the case of (i), (ii) and (iii) above, (w) a disposition by a Restricted
Subsidiary to the Company or by the Company or a Restricted Subsidiary to a
Wholly Owned Subsidiary, (x) for purposes of the covenant described under "--
Certain Covenants -- Limitation on Sales of Assets and Subsidiary Stock" only, a
disposition that constitutes a Restricted Payment permitted by the covenant
described under "-- Certain Covenants -- Limitation on Restricted Payments," (y)
a disposition of obsolete or worn out equipment or equipment that is no longer
useful in the conduct of the business of the Company and its Restricted
Subsidiaries and that is disposed of, in each case, in the ordinary course of
business and (z) disposition of assets with a fair market value of less than
$500,000).
 
     "Attributable Debt" in respect of a Sale/Leaseback Transaction means, as at
the time of determination, the present value (discounted at the interest rate
borne by the Notes, compounded annually) of the total obligations of the lessee
for rental payments during the remaining term of the lease included in such
Sale/Leaseback Transaction (including any period for which such lease has been
extended).
 
     "Average Life" means, as of the date of determination, with respect to any
Indebtedness or Preferred Stock, the quotient obtained by dividing (i) the sum
of the products of numbers of years from the date of determination to the dates
of each successive scheduled principal payment of such Indebtedness or
 
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<PAGE>   101
 
redemption or similar payment with respect to such Preferred Stock multiplied by
the amount of such payment by (ii) the sum of all such payments.
 
     "Bank Indebtedness" means all Indebtedness outstanding under the Credit
Agreement.
 
     "Board of Directors" means the Board of Directors of the Company or any
committee thereof duly authorized to act on behalf of such Board.
 
     "Business Day" means each day which is not a Legal Holiday.
 
     "Capital Lease Obligations" means an obligation that is required to be
classified and accounted for as a capital lease for financial reporting purposes
in accordance with GAAP, and the amount of Indebtedness represented by such
obligation shall be the capitalized amount of such obligation determined in
accordance with GAAP; and the Stated Maturity thereof shall be the date of the
last payment of rent or any other amount due under such lease prior to the first
date upon which such lease may be terminated by the lessee without payment of a
penalty.
 
     "Capital Stock" of any Person means any and all shares, interests, rights
to purchase, warrants, options, participations or other equivalents of or
interests in (however designated) equity of such Person, including any Preferred
Stock, but excluding any debt securities convertible into such equity.
 
     "Code" means the Internal Revenue Code of 1986, as amended.
 
     "Consolidated Coverage Ratio" as of any date of determination means the
ratio of (i) the aggregate amount of EBITDA for the period of the most recent
four consecutive fiscal quarters ending at least 45 days prior to the date of
such determination to (ii) Consolidated Interest Expense for such four fiscal
quarters; provided, however, that (1) if the Company or any Restricted
Subsidiary has Incurred any Indebtedness since the beginning of such period that
remains outstanding or if the transaction giving rise to the need to calculate
the Consolidated Coverage Ratio is an Incurrence of Indebtedness, or both,
EBITDA and Consolidated Interest Expense for such period shall be calculated
after giving effect on a pro forma basis to such Indebtedness as if such
Indebtedness had been Incurred on the first day of such period (provided that if
such Indebtedness is Incurred under a revolving credit facility (or similar
arrangement or under any predecessor revolving credit or similar arrangement)
only that portion of such Indebtedness that constitutes the one year projected
average balance of such Indebtedness (as determined in good faith by senior
management of the Company and assuming a constant level of sales) shall be
deemed outstanding for purposes of this calculation) and the discharge of any
other Indebtedness repaid, repurchased, defeased or otherwise discharged with
the proceeds of such new Indebtedness as if such discharge had occurred on the
first day of such period, (2) if the Company or any Restricted Subsidiary has
repaid, repurchased, defeased or otherwise discharged any Indebtedness since the
beginning of such period or if any Indebtedness is to be repaid, repurchased,
defeased or otherwise discharged (in each case other than Indebtedness Incurred
under any revolving credit facility unless such Indebtedness has been
permanently repaid and has not been replaced) on the date of the transaction
giving rise to the need to calculate the Consolidated Coverage Ratio, EBITDA and
Consolidated Interest Expense for such period shall be calculated on a pro forma
basis as if such discharge had occurred on the first day of such period and as
if the Company or such Restricted Subsidiary has not earned the interest income
actually earned during such period in respect of cash or Temporary Cash
Investments used to repay, repurchase, defease or otherwise discharge such
Indebtedness, (3) if since the beginning of such period the Company or any
Restricted Subsidiary shall have made any Asset Disposition, the EBITDA for such
period shall be reduced by an amount equal to the EBITDA (if positive) directly
attributable to the assets which are the subject of such Asset Disposition for
such period, or increased by an amount equal to the EBITDA (if negative),
directly attributable thereto for such period and Consolidated Interest Expense
for such period shall be reduced by an amount equal to the Consolidated Interest
Expense directly attributable to any Indebtedness of the Company or any
Restricted Subsidiary repaid, repurchased, defeased or otherwise discharged with
respect to the Company and its continuing Restricted Subsidiaries in connection
with such Asset Disposition for such period (or, if the Capital Stock of any
Restricted Subsidiary is sold, the Consolidated Interest Expense for such period
directly attributable to the Indebtedness of such Restricted Subsidiary to the
extent the Company and its continuing Restricted Subsidiaries are no longer
liable for such
 
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<PAGE>   102
 
Indebtedness after such sale), (4) if since the beginning of such period the
Company or any Restricted Subsidiary (by merger or otherwise) shall have made an
Investment in any Restricted Subsidiary (or any person which becomes a
Restricted Subsidiary) or an acquisition of assets, including any acquisition of
assets occurring in connection with a transaction requiring a calculation to be
made hereunder, which constitutes all or substantially all of an operating unit
of a business, EBITDA and Consolidated Interest Expense for such period shall be
calculated after giving pro forma effect thereto (including the Incurrence of
any Indebtedness) as if such Investment or acquisition occurred on the first day
of such period and (5) if since the beginning of such period any Person (that
subsequently became a Restricted Subsidiary or was merged with or into the
Company or any Restricted Subsidiary since the beginning of such period) shall
have made any Asset Disposition, any Investment or acquisition of assets that
would have required an adjustment pursuant to clause (3) or (4) above if made by
the Company or a Restricted Subsidiary during such period, EBITDA and
Consolidated Interest Expense for such period shall be calculated after giving
pro forma effect thereto as if such Asset Disposition, Investment or acquisition
occurred on the first day of such period. For purposes of this definition,
whenever pro forma effect is to be given to an acquisition of assets, the amount
of income or earnings relating thereto and the amount of Consolidated Interest
Expense associated with any Indebtedness Incurred in connection therewith, the
pro forma calculations shall be determined in good faith, without duplication,
by a responsible financial or accounting Officer of the Company. If any
Indebtedness bears a floating rate of interest and is being given pro forma
effect, the interest of such Indebtedness shall be calculated as if the rate in
effect on the date of determination had been the applicable rate for the entire
period (taking into account any Interest Rate Agreement applicable to such
Indebtedness if such Interest Rate Agreement has a remaining term in excess of
12 months).
 
     "Consolidated Interest Expense" means, for any period, the total interest
expense of the Company and its consolidated Restricted Subsidiaries, plus, to
the extent not included in such total interest expense, and to the extent
incurred by the Company or its Restricted Subsidiaries, without duplication, (i)
interest expense attributable to capital leases and the interest expense
attributable to leases constituting part of a Sale/Leaseback Transaction, (ii)
amortization of debt discount and debt issuance cost, (iii) capitalized
interest, (iv) non-cash interest expenses, (v) commissions, discounts and other
fees and charges owed with respect to letters of credit and bankers' acceptance
financing, (vi) net costs associated with Hedging Obligations (including
amortization of fees), (vii) Preferred Stock dividends in respect of all
Preferred Stock held by Persons other than the Company or a Wholly Owned
Subsidiary, (viii) interest incurred in connection with Investments in
discontinued operations, (ix) interest accruing on any Indebtedness of any other
Person to the extent such Indebtedness is Guaranteed by (or secured by the
assets of) the Company or any Restricted Subsidiary and (x) the cash
contributions to any employee stock ownership plan or similar trust to the
extent such contributions are used by such plan or trust to pay interest or fees
to any Person (other than the Company) in connection with Indebtedness Incurred
by such plan or trust.
 
     "Consolidated Net Income" means, for any period, the net income of the
Company and its consolidated Subsidiaries; provided, however, that there shall
not be included in the calculation of such Consolidated Net Income:
 
          (i) any net income of any Person (other than the Company) if such
     Person is not a Restricted Subsidiary, except that (A) subject to the
     exclusion contained in clause (iv) below, the Company's equity in the net
     income of any such Person for such period shall be included in such
     Consolidated Net Income up to the aggregate amount of cash actually
     distributed by such Person during such period to the Company or a
     Restricted Subsidiary as a dividend or other distribution (subject, in the
     case of a dividend or other distribution paid to a Restricted Subsidiary,
     to the limitations contained in clause (iii) below) and (B) the Company's
     equity in a net loss of any such Person for such period shall be included
     in determining such Consolidated Net Income;
 
          (ii) any net income (or loss) of any Person acquired by the Company or
     a Subsidiary in a pooling of interests transaction for any period prior to
     the date of such acquisition;
 
          (iii) any net income of any Restricted Subsidiary if such Restricted
     Subsidiary is subject to restrictions, directly or indirectly, on the
     payment of dividends or the making of distributions by such
 
                                       98
<PAGE>   103
 
     Restricted Subsidiary, directly or indirectly, to the Company, except that
     (A) subject to the exclusion contained in clause (iv) below, the Company's
     equity in the net income of any such Restricted Subsidiary for such period
     shall be included in such Consolidated Net Income up to the aggregate
     amount of cash that could have been distributed by such Restricted
     Subsidiary during such period to the Company or another Restricted
     Subsidiary as a dividend or other distribution (subject, in the case of a
     dividend or other distribution paid to another Restricted Subsidiary, to
     the limitation contained in this clause) and (B) the Company's equity in a
     net loss of any such Restricted Subsidiary for such period shall be
     included in determining such Consolidated Net Income;
 
          (iv) any gain or loss realized upon the sale or other disposition of
     any assets of the Company, its consolidated Subsidiaries or any other
     Person (including pursuant to any sale-and-leaseback arrangement) which is
     not sold or otherwise disposed of in the ordinary course of business and
     any gain or loss realized upon the sale or other disposition of any Capital
     Stock of any Person;
 
          (v) extraordinary gains or losses;
 
          (vi) the cumulative effect of a change in accounting principles; and
 
          (vii) any restructuring charges related to the closing of the
     Company's Greenville, Mississippi manufacturing facility.
 
Notwithstanding the foregoing, for the purposes of the covenant described under
"Certain Covenants-Limitation on Restricted Payments" only, there shall be
excluded from Consolidated Net Income any dividends, repayments of loans or
advances or other transfers of assets from Unrestricted Subsidiaries to the
Company or a Restricted Subsidiary to the extent such dividends, repayments or
transfers increase the amount of Restricted Payments permitted under such
covenant pursuant to clause (a)(3)(D) thereof.
 
     "Consolidated Net Worth" means the total of the amounts shown on the
balance sheet of the Company and its consolidated Subsidiaries, determined on a
consolidated basis in accordance with GAAP, as of the end of the most recent
fiscal quarter of the Company ending at least 45 days prior to the taking of any
action for the purpose of which the determination is being made, as (i) the par
or stated value of all outstanding Capital Stock of the Company plus (ii)
paid-in capital or capital surplus relating to such Capital Stock plus (iii) any
retained earnings or earned surplus less (A) any accumulated deficit and (B) any
amounts attributable to Disqualified Stock.
 
     "Credit Agreement" means (i) the Second Amended and Restated Credit
Agreement dated as of June 23, 1998, between the Company, the lenders party
thereto in their capacities as lenders thereunder and Comerica Bank, as agent,
together with all exhibits, schedules and appendices thereto, as the same may be
amended, supplemented or otherwise modified from time to time and (ii) any
renewal, extension, refunding, restructuring, replacement or refinancing thereof
(whether under such agreement or any successor or replacement agreement and
whether by the same or any other agent, lender or group of lenders).
 
     "Currency Agreement" means in respect of a Person any foreign exchange
contract, currency swap agreement or other similar agreement designed to protect
such Person against fluctuations in currency values.
 
     "Default" means any event which is, or after notice or passage of time or
both would be, an Event of Default.
 
     "Designated Senior Indebtedness" means (i) the Bank Indebtedness and (ii)
any other Senior Indebtedness of the Company which, at the date of
determination, has an aggregate principal amount outstanding of, or under which,
at the date of determination, the holders thereof are committed to lend up to,
at least $25 million and is specifically designated by the Company in the
instrument evidencing or governing such Senior Indebtedness as "Designated
Senior Indebtedness" for purposes of the Indenture.
 
     "Disqualified Stock" means, with respect to any Person, any Capital Stock
which by its terms (or by the terms of any security into which it is convertible
or for which it is exchangeable) or upon the happening of any event (i) matures
or is mandatorily redeemable pursuant to a sinking fund obligation or otherwise,
(ii) is convertible or exchangeable for Indebtedness or Disqualified Stock or
(iii) is redeemable or must be
 
                                       99
<PAGE>   104
 
purchased, upon the occurrence of certain events or otherwise, by such Person at
the option of the holder thereof, in whole or in part, in each case on or prior
to the first anniversary of the Stated Maturity of the Notes; provided, however,
that any Capital Stock that would not constitute Disqualified Stock but for
provisions thereof giving holders thereof the right to require such Person to
purchase or redeem such Capital Stock upon the occurrence of an "asset sale" or
"change of control" occurring prior to the first anniversary of the Stated
Maturity of the Notes shall not constitute Disqualified Stock if (x) the "asset
sale" or "change of control" provisions applicable to such Capital Stock are not
more favorable to the holders of such Capital Stock than the terms applicable to
the Notes and described under "-- Certain Covenants -- Limitation on Sales of
Assets and Subsidiary Stock" and "-- Certain Covenants -- Change of Control" and
(y) any such requirement only becomes operative after compliance with such terms
applicable to the Notes, including the purchase of any Notes tendered pursuant
thereto.
 
     "EBITDA" for any period means the sum of Consolidated Net Income, plus
Consolidated Interest Expense plus the following to the extent deducted in
calculating such Consolidated Net Income: (a) all income tax expense of the
Company and its consolidated Restricted Subsidiaries, (b) depreciation expense
of the Company and its consolidated Restricted Subsidiaries, (c) amortization
expense of the Company and its consolidated Restricted Subsidiaries (excluding
amortization expense attributable to a prepaid cash item that was paid in a
prior period) and (d) all other non-cash charges of the Company and its
consolidated Restricted Subsidiaries (excluding any such non-cash charge to the
extent that it represents an accrual of or reserve for cash expenditures in any
future period), in each case for such period. Notwithstanding the foregoing, the
provision for taxes based on the income or profits of, and the depreciation and
amortization and non-cash charges of, a Restricted Subsidiary shall be added to
Consolidated Net Income to compute EBITDA only to the extent (and in the same
proportion) that the net income of such Restricted Subsidiary was included in
calculating Consolidated Net Income and only if a corresponding amount would be
permitted at the date of determination to be dividended to the Company by such
Restricted Subsidiary without prior approval (that has not been obtained),
pursuant to the terms of its charter and all agreements, instruments, judgments,
decrees, orders, statutes, rules and governmental regulations applicable to such
Restricted Subsidiary or its stockholders.
 
     "Exchange Act" means the Securities Exchange Act of 1934, as amended.
 
     "Foreign Subsidiary" means a Restricted Subsidiary that is incorporated in
a jurisdiction other than the United States or a State thereof or the District
of Columbia and with respect to which more than 80% of any of its sales,
earnings or assets (determined on a consolidated basis in accordance with GAAP)
are located in, generated from or derived from operations located in territories
outside of the United States of America and jurisdictions outside the United
States of America.
 
     "GAAP" means generally accepted accounting principles in the United States
of America as in effect as of the Issue Date, including those set forth in (i)
the opinions and pronouncements of the Accounting Principles Board of the
American Institute of Certified Public Accountants, (ii) statements and
pronouncements of the Financial Accounting Standards Board, (iii) such other
statements by such other entity as approved by a significant segment of the
accounting profession and (iv) the rules and regulations of the SEC governing
the inclusion of financial statements (including pro forma financial statements)
in periodic reports required to be filed pursuant to Section 13 of the Exchange
Act, including opinions and pronouncements in staff accounting bulletins and
similar written statements from the accounting staff of the SEC.
 
     "Guarantee" means any obligation, contingent or otherwise, of any Person
directly or indirectly guaranteeing any Indebtedness of any Person and any
obligation, direct or indirect, contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Indebtedness or other obligation of such Person (whether arising by virtue of
partnership arrangements, or by agreements to keep-well, to purchase assets,
goods, securities or services, to take-or-pay or to maintain financial statement
conditions or otherwise) or (ii) entered into for the purpose of assuring in any
other manner the obligee of such Indebtedness of the payment thereof or to
protect such obligee against loss in respect thereof (in whole or in part);
provided, however, that the term "Guarantee" shall not include
 
                                       100
<PAGE>   105
 
endorsements for collection or deposit in the ordinary course of business. The
term "Guarantee" used as a verb has a corresponding meaning. The term
"Guarantor" shall mean any Person Guaranteeing any obligation.
 
     "Hedging Obligations" of any Person means the obligations of such Person
pursuant to any Interest Rate Agreement or Currency Agreement.
 
     "Holder" or "Noteholder" means the Person in whose name a Note is
registered on the Registrar's books.
 
     "Incur" means issue, assume, Guarantee, incur or otherwise become liable
for; provided, however, that any Indebtedness or Capital Stock of a Person
existing at the time such Person becomes a Subsidiary (whether by merger,
consolidation, acquisition or otherwise) shall be deemed to be Incurred by such
Subsidiary at the time it becomes a Subsidiary. The term "Incurrence" when used
as a noun shall have a correlative meaning. The accretion of principal of a
non-interest bearing or other discount security shall be deemed the Incurrence
of Indebtedness.
 
     "Indebtedness" means, with respect to any Person on any date of
determination (without duplication):
 
          (i) the principal in respect of (A) indebtedness of such Person for
     money borrowed and (B) indebtedness evidenced by notes, debentures, bonds
     or other similar instruments for the payment of which such Person is
     responsible or liable, including, in each case, any premium on such
     indebtedness to the extent such premium has become due and payable;
 
          (ii) all Capital Lease Obligations of such Person and all Attributable
     Debt in respect of Sale/Leaseback Transactions entered into by such Person;
 
          (iii) all obligations of such Person issued or assumed as the deferred
     purchase price of property, all conditional sale obligations of such Person
     and all obligations of such Person under any title retention agreement (but
     excluding trade accounts payable arising in the ordinary course of
     business);
 
          (iv) all obligations of such Person for the reimbursement of any
     obligor on any letter of credit, banker's acceptance or similar credit
     transaction (other than obligations with respect to letters of credit
     securing obligations (other than obligations described in clauses (i)
     through (iii) above) entered into in the ordinary course of business of
     such Person to the extent such letters of credit are not drawn upon or, if
     and to the extent drawn upon, such drawing is reimbursed no later than the
     30th Business Day following payment on the letter of credit);
 
          (v) the amount of all obligations of such Person with respect to the
     redemption, repayment or other repurchase of any Disqualified Stock or,
     with respect to any Subsidiary of such Person, the liquidation preference
     with respect to, any Preferred Stock (but excluding, in each case, any
     accrued dividends);
 
          (vi) all obligations of the type referred to in clauses (i) through
     (v) of other Persons and all dividends of other Persons for the payment of
     which, in either case, such Person is responsible or liable, directly or
     indirectly, as obligor, guarantor or otherwise, including by means of any
     Guarantee;
 
          (vii) all obligations of the type referred to in clauses (i) through
     (vi) of other Persons secured by any Lien on any property or asset of such
     Person (whether or not such obligation is assumed by such Person), the
     amount of such obligation being deemed to be the lesser of the value of
     such property or assets or the amount of the obligation so secured; and
 
          (viii) to the extent not otherwise included in this definition,
     Hedging Obligations of such Person.
 
The amount of Indebtedness of any Person at any date shall be the outstanding
balance at such date of all unconditional obligations as described above and the
maximum liability, upon the occurrence of the contingency giving rise to the
obligation, of any contingent obligations at such date.
 
     "Interest Rate Agreement" means in respect of a Person any interest rate
swap agreement, interest rate cap agreement or other financial agreement or
arrangement designed to protect such Person against fluctuations in interest
rates.
 
                                       101
<PAGE>   106
 
     "Investment" in any Person means any direct or indirect advance, loan
(other than advances to customers in the ordinary course of business that are
recorded as accounts receivable on the balance sheet of the lender) or other
extensions of credit (including by way of Guarantee or similar arrangement) or
capital contribution to (by means of any transfer of cash or other property to
others or any payment for property or services for the account or use of
others), or any purchase or acquisition of Capital Stock, Indebtedness or other
similar instruments issued by such Person. For purposes of the definition of
"Unrestricted Subsidiary," the definition of "Restricted Payment" and the
covenant described under "-- Certain Covenants -- Limitation on Restricted
Payments," (i) "Investment" shall include the portion (proportionate to the
Company's equity interest in such Subsidiary) of the fair market value of the
net assets of any Subsidiary of the Company at the time that such Subsidiary is
designated an Unrestricted Subsidiary; provided, however, that upon a
redesignation of such Subsidiary as a Restricted Subsidiary, the Company shall
be deemed to continue to have a permanent "Investment" in an Unrestricted
Subsidiary equal to an amount (if positive) equal to (x) the Company's
"Investment" in such Subsidiary at the time of such redesignation less (y) the
portion (proportionate to the Company's equity interest in such Subsidiary) of
the fair market value of the net assets of such Subsidiary at the time of such
redesignation; and (ii) any property transferred to or from an Unrestricted
Subsidiary shall be valued at its fair market value at the time of such
transfer, in each case as determined in good faith by the Board of Directors.
 
     "Issue Date" means the date on which the Notes are originally issued.
 
     "Lien" means any mortgage, pledge, security interest, encumbrance, lien or
charge of any kind (including any conditional sale or other title retention
agreement or lease in the nature thereof).
 
     "Net Available Cash" from an Asset Disposition means cash payments received
therefrom (including any cash payments received by way of deferred payment of
principal pursuant to a note or installment receivable or otherwise and proceeds
from the sale or other disposition of any securities received as consideration,
but only as and when received, but excluding any other consideration received in
the form of assumption by the acquiring Person of Indebtedness or other
obligations relating to such properties or assets or received in any other
noncash form), in each case net of (i) all legal, title and recording tax
expenses, commissions and other fees and expenses incurred, and all Federal,
state, provincial, foreign and local taxes required to be accrued as a liability
under GAAP, as a consequence of such Asset Disposition, (ii) all payments made
on any Indebtedness which is secured by any assets subject to such Asset
Disposition, in accordance with the terms of any Lien upon or other security
agreement of any kind with respect to such assets, or which must by its terms,
or in order to obtain a necessary consent to such Asset Disposition, or by
applicable law, be repaid out of the proceeds from such Asset Disposition, (iii)
all distributions and other payments required to be made to minority interest
holders in Restricted Subsidiaries as a result of such Asset Disposition and
(iv) the deduction of appropriate amounts provided by the seller as a reserve,
in accordance with GAAP, against any liabilities associated with the property or
other assets disposed in such Asset Disposition and retained by the Company or
any Restricted Subsidiary after such Asset Disposition.
 
     "Net Cash Proceeds", with respect to any issuance or sale of Capital Stock,
means the cash proceeds of such issuance or sale net of attorneys' fees,
accountants' fees, underwriters' or placement agents' fees, discounts or
commissions and brokerage, consultant and other fees actually incurred in
connection with such issuance or sale and net of taxes paid or payable as a
result thereof.
 
     "Permitted Holders" means (i) J. H. Whitney & Co. and any Person who on the
Issue Date is an Affiliate of J. H. Whitney & Co. and (ii) any Person who, on
the Issue Date, is a member of the senior management and a beneficial
shareholder of the Company.
 
     "Permitted Investment" means an Investment by the Company or any Restricted
Subsidiary in (i) the Company, a Restricted Subsidiary or a Person that will,
upon the making of such Investment, become a Restricted Subsidiary; provided,
however, that the primary business of such Restricted Subsidiary is a Related
Business; (ii) another Person if as a result of such Investment such other
Person is merged or consolidated with or into, or transfers or conveys all or
substantially all its assets to, the Company or a Restricted Subsidiary;
provided, however, that such Person's primary business is a Related Business;
(iii) Temporary Cash Investments; (iv) receivables owing to the Company or any
Restricted Subsidiary if created or acquired
                                       102
<PAGE>   107
 
in the ordinary course of business and payable or dischargeable in accordance
with customary trade terms; provided, however, that such trade terms may include
such concessionary trade terms as the Company or any such Restricted Subsidiary
deems reasonable under the circumstances; (v) payroll, travel and similar
advances to cover matters that are expected at the time of such advances
ultimately to be treated as expenses for accounting purposes and that are made
in the ordinary course of business; (vi) loans or advances to employees made in
the ordinary course of business consistent with past practices of the Company or
such Restricted Subsidiary; (vii) stock, obligations or securities received in
settlement of debts created in the ordinary course of business and owing to the
Company or any Restricted Subsidiary or in satisfaction of judgments; (viii)
Permitted Joint Ventures not in excess of $7.5 million at any time outstanding;
and (ix) any Person to the extent such Investment represents the non-cash
portion of the consideration received for an Asset Disposition as permitted
pursuant to the covenant described under "-- Certain Covenants -- Limitation on
Sales of Assets and Subsidiary Stock."
 
     "Permitted Joint Ventures" means joint ventures conducting a Related
Business primarily outside of the United States.
 
     "Person" means any individual, corporation, partnership, limited liability
company, joint venture, association, joint-stock company, trust, unincorporated
organization, government or any agency or political subdivision thereof or any
other entity.
 
     "Preferred Stock", as applied to the Capital Stock of any Person, means
Capital Stock of any class or classes (however designated) which is preferred as
to the payment of dividends or distributions, or as to the distribution of
assets upon any voluntary or involuntary liquidation or dissolution of such
Person, over shares of Capital Stock of any other class of such Person.
 
     "Principal" of a Note means the principal of the Note plus the premium, if
any, payable on the Note which is due or overdue or is to become due at the
relevant time.
 
     "Public Equity Offering" means an underwritten primary public offering of
common stock of the Company pursuant to an effective registration statement
under the Securities Act.
 
     "Public Market" means any time after (x) a Public Equity Offering has been
consummated and (y) at least 15% of the total issued and outstanding common
stock of the Company has been distributed by means of an effective registration
statement under the Securities Act or sales pursuant to Rule 144 under the
Securities Act.
 
     "Refinance" means, in respect of any Indebtedness, to refinance, extend,
renew, refund, repay, prepay, redeem, defease or retire, or to issue other
Indebtedness in exchange or replacement for, such indebtedness. "Refinanced" and
"Refinancing" shall have correlative meanings.
 
     "Refinancing Indebtedness" means Indebtedness that Refinances any
Indebtedness of the Company or any Restricted Subsidiary existing on the Issue
Date or Incurred in compliance with the Indenture, including Indebtedness that
Refinances Refinancing Indebtedness; provided, however, that (i) such
Refinancing Indebtedness has a Stated Maturity no earlier than the Stated
Maturity of the Indebtedness being Refinanced, (ii) such Refinancing
Indebtedness has an Average Life at the time such Refinancing Indebtedness is
Incurred that is equal to or greater than the Average Life of the Indebtedness
being Refinanced and (iii) such Refinancing Indebtedness has an aggregate
principal amount (or if Incurred with original issue discount, an aggregate
issue price) that is equal to or less than the aggregate principal amount (or if
Incurred with original issue discount, the aggregate accreted value) then
outstanding or committed (plus fees and expenses, including any premium and
defeasance costs) under the Indebtedness being Refinanced; provided further,
however, that Refinancing Indebtedness shall not include (x) Indebtedness of a
Subsidiary that Refinances Indebtedness of the Company or (y) Indebtedness of
the Company or a Restricted Subsidiary that Refinances Indebtedness of an
Unrestricted Subsidiary.
 
     "Related Business" means any business related, ancillary or complementary
to the businesses of the Company and the Restricted Subsidiaries on the Issue
Date.
 
                                       103
<PAGE>   108
 
     "Representative" means any trustee, agent or representative (if any) for an
issue of Senior Indebtedness of the Company.
 
     "Restricted Payment" with respect to any Person means (i) the declaration
or payment of any dividends or any other distributions of any sort in respect of
its Capital Stock (including any payment in connection with any merger or
consolidation involving such Person) or similar payment to the direct or
indirect holders of its Capital Stock (other than dividends or distributions
payable solely in its Capital Stock (other than Disqualified Stock) and
dividends or distributions payable solely to the Company or a Restricted
Subsidiary, and other than pro rata dividends or other distributions made by a
Subsidiary that is not a Wholly Owned Subsidiary to minority stockholders (or
owners of an equivalent interest in the case of a Subsidiary that is an entity
other than a corporation)), (ii) the purchase, redemption or other acquisition
or retirement for value of any Capital Stock of the Company held by any Person
or of any Capital Stock of a Restricted Subsidiary held by any Affiliate of the
Company (other than a Restricted Subsidiary), including the exercise of any
option to exchange any Capital Stock (other than into Capital Stock of the
Company that is not Disqualified Stock), (iii) the purchase, repurchase,
redemption, defeasance or other acquisition or retirement for value, prior to
scheduled maturity, scheduled repayment or scheduled sinking fund payment of any
Subordinated Obligations (other than the purchase, repurchase or other
acquisition of Subordinated Obligations purchased in anticipation of satisfying
a sinking fund obligation, principal installment or final maturity, in each case
due within one year of the date of acquisition) or (iv) the making of any
Investment in any Person (other than a Permitted Investment).
 
     "Restricted Subsidiary" means any Subsidiary of the Company that is not an
Unrestricted Subsidiary.
 
     "Sale/Leaseback Transaction" means an arrangement relating to property now
owned or hereafter acquired whereby the Company or a Restricted Subsidiary
transfers such property to a Person and the Company or a Restricted Subsidiary
leases it from such Person.
 
     "SEC" means the Securities and Exchange Commission.
 
     "Secured Indebtedness" means any Indebtedness of the Company secured by a
Lien.
 
     "Senior Indebtedness" means (i) Indebtedness of the Company, whether
outstanding on the Issue Date or thereafter Incurred, and (ii) accrued and
unpaid interest (including interest accruing on or after the filing of any
petition in bankruptcy or for reorganization relating to the Company to the
extent post-filing interest is allowed in such proceeding) in respect of (A)
Indebtedness of the Company for money borrowed and (B) Indebtedness evidenced by
notes, debentures, bonds or other similar instruments for the payment of which
the Company is responsible or liable (in the case of each of (A) and (B),
whether outstanding on the Issue Date or thereafter Incurred) unless, in the
case of any particular Indebtedness, the instrument creating or evidencing the
same or pursuant to which the same is outstanding, it is provided that such
obligations are subordinate in right of payment to the Notes; provided, however,
that Senior Indebtedness shall not include (1) any obligation of the Company to
any Subsidiary, (2) any liability for Federal, state, local or other taxes owed
or owing by the Company, (3) any accounts payable or other liability to trade
creditors arising in the ordinary course of business (including guarantees
thereof or instruments evidencing such liabilities), (4) any Indebtedness of the
Company (and any accrued and unpaid interest in respect thereof) which is
subordinate or junior in any respect to any other Indebtedness or other
obligation of the Company or (5) that portion of any Indebtedness which at the
time of Incurrence is Incurred in violation of the Indenture.
 
     "Senior Subordinated Indebtedness" means the Notes and any other
Indebtedness of the Company that specifically provides that such Indebtedness is
to rank pari passu with the Notes in right of payment and is not subordinated by
its terms in right of payment to any Indebtedness or other obligation of the
Company which is not Senior Indebtedness.
 
     "Series A Preferred Stock" means the Series A Cumulative Preferred Stock,
par value $.01 per share, of the Company.
 
     "Series B Preferred Stock" means the Series B Cumulative Preferred Stock,
par value $.01 per share, of the Company.
 
                                       104
<PAGE>   109
 
     "Significant Subsidiary" means any Restricted Subsidiary that would be a
"Significant Subsidiary" of the Company within the meaning of Rule 1-02 under
Regulation S-X promulgated by the SEC.
 
     "Stated Maturity" means, with respect to any security, the date specified
in such security as the fixed date on which the final payment of principal of
such security is due and payable, including pursuant to any mandatory redemption
provision (but excluding any provision providing for the repurchase of such
security at the option of the holder thereof upon the happening of any
contingency unless such contingency has occurred).
 
     "Subordinated Obligation" means any Indebtedness of the Company (whether
outstanding on the Issue Date or thereafter Incurred) which is subordinate or
junior in right of payment to the Notes pursuant to a written agreement to that
effect.
 
     "Subsidiary" means, in respect of any Person, any corporation, association,
partnership or other business entity of which more than 50% of the total voting
power of shares of Capital Stock or other interests (including partnership
interests) entitled (without regard to the occurrence of any contingency) to
vote in the election of directors, managers or trustees thereof is at the time
owned or controlled, directly or indirectly, by (i) such Person, (ii) such
Person and one or more Subsidiaries of such Person or (iii) one or more
Subsidiaries of such Person.
 
     "Temporary Cash Investments" means any of the following:
 
          (i) any investment in direct obligations of the United States of
     America or any agency thereof or obligations guaranteed by the United
     States of America or any agency thereof,
 
          (ii) investments in time deposit accounts, certificates of deposit and
     money market deposits maturing within 180 days of the date of acquisition
     thereof issued by a bank or trust company which is organized under the laws
     of the United States of America, any state thereof or any foreign country
     recognized by the United States, and which bank or trust company has
     capital, surplus and undivided profits aggregating in excess of $50,000,000
     (or the foreign currency equivalent thereof) and has outstanding debt which
     is rated "A" (or such similar equivalent rating) or higher by at least one
     nationally recognized statistical rating organization (as defined in Rule
     436 under the Securities Act) or any money-market fund sponsored by a
     registered broker dealer or mutual fund distributor,
 
          (iii) repurchase obligations with a term of not more than 30 days for
     underlying securities of the types described in clause (i) above entered
     into with a bank meeting the qualifications described in clause (ii) above,
 
          (iv) investments in commercial paper, maturing not more than 90 days
     after the date of acquisition, issued by a corporation (other than an
     Affiliate of the Company) organized and in existence under the laws of the
     United States of America or any foreign country recognized by the United
     States of America with a rating at the time as of which any investment
     therein is made of "P-1" (or higher) according to Moody's Investors
     Service, Inc. or "A-1" (or higher) according to Standard & Poor's Ratings
     Group, and
 
          (v) investments in securities with maturities of six months or less
     from the date of acquisition issued or fully guaranteed by any state,
     commonwealth or territory of the United States of America, or by any
     political subdivision or taxing authority thereof, and rated at least "A"
     by Standard & Poor's Ratings Group or "A" by Moody's Investors Service,
     Inc.
 
     "Unrestricted Subsidiary" means (i) any Subsidiary of the Company that at
the time of determination shall be designated an Unrestricted Subsidiary by the
Board of Directors in the manner provided below and (ii) any Subsidiary of an
Unrestricted Subsidiary. The Board of Directors may designate any Subsidiary of
the Company (including any newly acquired or newly formed Subsidiary) to be an
Unrestricted Subsidiary unless such Subsidiary or any of its Subsidiaries owns
any Capital Stock or Indebtedness of, or holds any Lien on any property of, the
Company or any other Subsidiary of the Company that is not a Subsidiary of the
Subsidiary to be so designated; provided, however, that either (A) the
Subsidiary to be so designated has total assets of $1,000 or less or (B) if such
Subsidiary has assets greater than $1,000, such designation would be permitted
under the covenant described under "-- Certain Covenants -- Limitation on
Restricted Payments." The
                                       105
<PAGE>   110
 
Board of Directors may designate any Unrestricted Subsidiary to be a Restricted
Subsidiary; provided, however, that immediately after giving effect to such
designation (x) the Company could Incur $1.00 of additional Indebtedness under
paragraph (a) of the covenant described under "-- Certain Covenants --
Limitation on Indebtedness" and (y) no Default shall have occurred and be
continuing. Any such designation by the Board of Directors shall be evidenced to
the Trustee by promptly filing with the Trustee a copy of the resolution of the
Board of Directors giving effect to such designation and an Officers'
Certificate certifying that such designation complied with the foregoing
provisions.
 
     "U.S. Government Obligations" means direct obligations (or certificates
representing an ownership interest in such obligations) of the United States of
America (including any agency or instrumentality thereof) for the payment of
which the full faith and credit of the United States of America is pledged and
which are not callable at the issuer's option.
 
     "Voting Stock" of a Person means all classes of Capital Stock or other
interests (including partnership interests) of such Person then outstanding and
normally entitled (without regard to the occurrence of any contingency) to vote
in the election of directors, managers or trustees thereof.
 
     "WEP" means Whitney Equity Partners, L.P. and its successors.
 
     "Wholly Owned Subsidiary" means a Restricted Subsidiary all the Capital
Stock of which (other than directors' qualifying shares and similar ownership
required or made necessary to conduct business by the laws or regulations of the
jurisdiction under which it is incorporated) is owned by the Company or one or
more Wholly Owned Subsidiaries.
 
                                       106
<PAGE>   111
 
            MATERIAL UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS
 
     Following is a general discussion of all material United States federal
income tax consequences of the purchase, ownership and disposition of the Notes
to initial holders thereof. Except as provided below under "Foreign Holders,"
this discussion is limited to investors that are United States Holders (that is,
a holder that is, for United States federal income tax purposes, (i) a citizen
or resident of the United States; (ii) a corporation or other entity taxable as
a corporation created or organized in or under the laws of the United States or
any political subdivision thereof; (iii) an estate the income of which is
subject to United States federal income taxation regardless of its source; or
(iv) a trust if (X) a U.S. court is able to exercise primary supervision over
the administration of the trust, and (Y) one or more U.S. persons have the
authority to control all substantial decisions of the trust.
 
     This discussion is based on currently existing provisions of the Internal
Revenue Code of 1986, as amended (the "Code"), existing and proposed U.S.
Treasury regulations promulgated thereunder, and administrative and judicial
interpretations thereof, all as in effect or proposed on the date hereof and all
of which are subject to change, possibly with retroactive effect, or different
interpretations. This discussion does not address the tax consequences to
subsequent purchasers of Notes, and is limited to investors who hold the Notes
as capital assets as defined in section 1221 of the Code. Moreover, the
discussion is for general information only, and does not address all of the tax
consequences that may be relevant to particular investors in light of their
personal circumstances, or to certain types of investors (such as certain
financial institutions, insurance companies, tax exempt entities, dealers in
securities or foreign currencies or persons who hold the Notes as a position in
a straddle or as part of a "conversion transaction" or who have hedged the
interest rate on the Notes).
 
UNITED STATES HOLDERS
 
     Interest on the Notes
 
     In general, interest paid or payable on a Note will be taxable to a United
States Holder as ordinary interest income at the time it is received or accrued,
in accordance with such holder's method of accounting for federal income tax
purposes.
 
     Disposition of the Notes
 
     Upon the sale, exchange, redemption, retirement at maturity or other
disposition of a Note, a United States Holder will generally recognize taxable
gain or loss equal to the difference between the sum of the cash plus the fair
market value of all other property received on such disposition and such
holder's adjusted tax basis in the Note (except to the extent such cash or
property is attributable to accrued interest, which will be taxable as ordinary
income).
 
     Gain or loss recognized on the disposition of a Note generally will be
capital gain or loss and will be long-term capital gain or loss if the Notes
were held for more than one year at the time of disposition. In the case of
individuals, capital gain will be subject to a maximum rate of (i) 20% if, at
the time of such disposition, the United States Holder's holding period for the
Note is more than 18 months, and (ii) 28% if, at the time of such disposition,
the United States Holder's holding period for the Notes is 18 months or less but
more than one year.
 
     Exchange Offer and Registration
 
     The exchange of an Existing Note for an Exchange Note pursuant to the
Exchange Offer should not constitute a taxable exchange for United States
federal income tax purposes. As a result, holders who exchange Existing Notes
for Exchange Notes pursuant to the Exchange Offer will not recognize any taxable
gain or loss for United States federal income tax purposes at the time of the
exchange and any such holder should have the same adjusted tax basis and holding
period in the Exchange Notes as it had in the Existing Notes immediately before
the exchange.
 
                                       107
<PAGE>   112
 
     Upon failure to comply with certain of its obligations under the
Registration Agreement, the Company would be required to pay additional interest
on the Existing Notes. Although the matter is not free from doubt, if additional
interest becomes payable on the Existing Notes, such additional interest should
be treated in the same manner as stated interest on the Existing Notes. It is
also possible, however, that if additional interest becomes payable on the
Existing Notes, all or a portion of any interest or additional interest earned
on the Existing Note may constitute original issue discount for Unites States
federal income tax purposes and, to that extent, a holder would be required to
report such original issue discount over the remaining term of the Notes on a
constant yield basis. INVESTORS SHOULD CONSULT THEIR TAX ADVISORS AS TO THE TAX
CONSIDERATIONS RELATING TO THE PAYMENT OF ADDITIONAL INTEREST.
 
FOREIGN HOLDERS
 
     For purposes of this discussion, a Foreign Holder means any holder of a
Note that is not a United States Holder. Subject to the discussion of backup
withholding below, a Foreign Holder generally will not be subject to United
States federal income or withholding tax on payments of interest on a Note,
provided that (i) the holder is not (A) a direct or indirect owner of 10 percent
or more of the total voting power of all voting stock of the Company or (B) a
controlled foreign corporation related to the Company through stock ownership
(actually or constructively), (ii) such interest payments are not effectively
connected with the conduct by the Foreign Holder of a trade or business within
the United States and (iii) the Company or its paying agent receives certain
information from the holder (or a financial institution that holds the Notes in
the ordinary course of its trade or business) certifying that such holder is a
Foreign Holder. See " -- Information Reporting and Backup Withholding" for
recent changes to the requirements described in (iii) above. Subject to the
discussion of backup withholding below, a Foreign Holder generally will not be
subject to United States federal income or withholding tax on gains from the
sale or other disposition of a Note, provided that (i) such gains are not
effectively connected with the conduct by the Foreign Holder of a trade or
business within the United States and (ii) such Foreign Holder is not an
individual who (A) is present in the United States for 183 days or more in the
taxable year of disposition and (B) meets certain other requirements.
 
INFORMATION REPORTING AND BACKUP WITHHOLDING
 
     On October 6, 1997, the Treasury Department issued final regulations
relating to withholding, information reporting and backup withholding that unify
current certification procedures and forms and clarify reliance standards (the
"Final Regulations"). The Final Regulations generally will be effective with
respect to payments made after December 31, 1999. Except as provided below, this
section describes rules applicable to payments made on or before December 31,
1999.
 
     A holder of a Note may be subject to backup withholding at a rate of 31%
with respect to interest paid on the Note and proceeds from the sale, exchange,
redemption or retirement of the Note, unless such holder (a) is a corporation or
comes within with certain other exempt categories and, when required,
demonstrates that fact or (b) provides a correct taxpayer identification number
(social security number or employer identification number), certifies as to its
exemption from backup withholding and otherwise complies with applicable
requirements of the backup withholding rules. Certain penalties may be imposed
by the Internal Revenue Service on a holder that is required to supply
information but does not do so in the proper manner.
 
     A Foreign Holder generally will be exempt from backup withholding and
information reporting requirements, but may be required to comply with
certification and identification procedures in order to obtain an exemption from
backup withholding and information reporting.
 
     Any amount withheld under the backup withholding rules from a payment to a
holder is allowable as a credit against such holder's United States federal
income tax (which might entitle such holder to a refund), provided that such
holder furnishes the required information to the Internal Revenue Service.
 
     The Final Regulations impose certain certification and documentation
requirements on Foreign Holders claiming an exemption from withholding,
information reporting and backup withholding on interest paid on the Notes and
proceeds of a sale of the Notes. INVESTORS SHOULD CONSULT THEIR TAX ADVISORS AS
TO THE EFFECT, IF ANY, OF THE FINAL REGULATIONS ON THEIR PURCHASE, OWNERSHIP AND
DISPOSITION OF THE NOTES.
                                       108
<PAGE>   113
 
     The exchange of an Existing Note for an Exchange Note should not constitute
a taxable exchange of the Existing Note if the interest rate on the Exchange
Note is equal to the interest rate on the Existing Note. Although there is no
definitive guidance on the issue, even if the interest rate on the Exchange Note
is not equal to the interest rate on the Existing Note because Additional
Interest is payable on the Existing Note but not on the Exchange Note, the
exchange should not constitute a taxable exchange of the Existing Note.
 
     PROSPECTIVE INVESTORS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS AS TO THE
PARTICULAR TAX CONSEQUENCES TO THEM OF THE PURCHASE, OWNERSHIP AND DISPOSITION
OF THE NOTES, INCLUDING THE APPLICABILITY OF ANY FEDERAL ESTATE OR GIFT TAX LAWS
OR ANY STATE, LOCAL OR FOREIGN TAX LAWS, ANY CHANGES IN APPLICABLE TAX LAWS AND
ANY PENDING OR PROPOSED LEGISLATION OR REGULATIONS. IN ADDITION, INDIVIDUAL
NOTEHOLDERS WHO ARE NOT CITIZENS OF THE UNITED STATES SHOULD CONSULT THEIR TAX
ADVISORS AS TO WHETHER THEY WILL OR WILL NOT BE DEEMED TO BE "RESIDENTS" OF THE
UNITED STATES FOR PURPOSES OF THE UNITED STATES INTERNAL REVENUE CODE OF 1986,
AS AMENDED.
 
                              PLAN OF DISTRIBUTION
 
     Each broker-dealer that receives Exchange Notes for its own account
pursuant to the Exchange Offer in exchange for Existing Notes must acknowledge
and agree that it will deliver a prospectus in connection with any resale of
such Exchange Notes. This Prospectus, as it may be amended or supplemented from
time to time, may be used by a broker-dealer in connection with resales of
Exchange Notes received in exchange for Existing Notes where such Existing Notes
were acquired as a result of market-making activities or other trading
activities. The Company has agreed that, for a period of 180 days after the
Expiration Date, it will make this Prospectus, as amended or supplemented,
available to any broker-dealer for use in connection with any such resale. In
addition, until April 6, 1999, all dealers effecting transactions in the
Exchange Notes may be required to deliver a prospectus.
 
     The Company will not receive any proceeds from any sale of Exchange Notes
by broker-dealers. Exchange Notes received by broker-dealers for their own
account pursuant to the Exchange Offer may be sold from time to time in one or
more transactions in the over-the-counter market, in negotiated transactions,
through the writing of options on the Exchange Notes or a combination of such
methods of resale, at market prices prevailing at the time of resale, at prices
related to such prevailing market prices or negotiated prices. Any such resale
may be made directly to purchasers or to or through broker-dealers who may
receive compensation in the form of commissions or concessions from any such
broker-dealer and/or the purchasers of any such Exchange Notes. Any
broker-dealer that resells Exchange Notes that were received by it for its own
account pursuant to the Exchange Offer and any person that participates in the
distribution of such Exchange Notes may be deemed to be an "underwriter" within
the meaning of the Securities Act, and any profit on any such resale of Exchange
Notes and any commissions or concessions received by any such persons may be
deemed to be underwriting compensation under the Securities Act. The Letter of
Transmittal states that by acknowledging and agreeing that it will deliver and
by delivering this Prospectus, a broker-dealer will not be deemed to admit that
it is an "underwriter" within the meaning of the Securities Act.
 
     For a period of 180 days after the Expiration Date, the Company will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal. The Company has agreed to pay all expenses
incident to the Exchange Offer other than commissions or concessions of any
brokers or dealers and will indemnify the holders of the Notes (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.
 
     By acceptance of this Exchange Offer, each broker-dealer agrees that, upon
receipt of notice from the Company of the happening of any event which makes any
statement in the Prospectus untrue in any material respect or which requires the
making of any changes in the Prospectus in order to make the statements therein
not misleading, such broker-dealer will suspend use of the Prospectus until (i)
the Company has amended or supplemented the Prospectus to correct such
misstatement or omission and (ii) either the Company has
                                       109
<PAGE>   114
 
furnished copies of the amended or supplemented Prospectus to such broker-dealer
or, if the Company has not otherwise agreed to furnish such copies and declines
to do so after such broker-dealer so requests, such broker-dealer has obtained a
copy of such amended or supplemented Prospectus as filed with the Commission.
The Company has agreed to deliver such notice and such amended or supplemented
Prospectus promptly to any Participating Broker-Dealer that has so notified the
Company.
 
     Pursuant to the Registration Agreement, the Company and the Guarantors have
jointly and severally agreed to indemnify the Initial Purchasers against certain
liabilities, including certain liabilities incurred in connection with the
offering of the Existing Notes, and contribute to payments the Initial
Purchasers may be required to make in respect thereof.
 
                                 LEGAL MATTERS
 
   
     Certain legal matters with respect to the legality of the issuance and sale
of the Exchange Notes offered hereby will be passed upon for the Company by
Whyte Hirschboeck Dudek S.C., Milwaukee, Wisconsin, of which James A. Feddersen,
Secretary of the Company, is a shareholder (see "Management" and "Certain
Relationships and Related Transactions"), and by Morrison Cohen Singer &
Weinstein, LLP, New York, New York .
    
 
                              INDEPENDENT AUDITORS
 
     The consolidated financial statements of Aqua-Chem, Inc. for the periods
from January 1, 1997 to July 31, 1997, and August 1, 1997 to December 31, 1997,
included in this Prospectus, have been audited by Arthur Andersen LLP,
Milwaukee, Wisconsin, independent public accountants, as stated in their report
appearing herein.
 
     The consolidated financial statements of Aqua-Chem, Inc. for the period
from January 1, 1995 to December 31, 1996, included in this Prospectus, have
been audited by KPMG Peat Marwick LLP, independent certified public accountants,
Milwaukee, Wisconsin, as stated in their report appearing herein.
 
     KPMG Peat Marwick LLP was previously the principal accountants for
Aqua-Chem, Inc. On January 23, 1998, that firm's appointment as principal
accountants was terminated and Arthur Andersen LLP was engaged as principal
accountants. The decision to change accountants was approved by the board of
directors.
 
     In connection with the audits of the two fiscal years ended December 31,
1996 and the subsequent interim period through January 23, 1998 there were no
disagreements with KPMG Peat Marwick LLP on any matter of accounting principles
or practices, financial statement disclosure, or auditing scope or procedures,
which disagreements if not resolved to their satisfaction would have caused them
to make reference in connection with their opinion to the subject matter of the
disagreement.
 
     The financial statements of National Dynamics Corporation for the period
from November 1, 1995 to October 31, 1997, included in this Prospectus, have
been audited by KPMG Peat Marwick LLP, independent certified public accountants,
Omaha, Nebraska, as stated in their report appearing herein.
 
                             AVAILABLE INFORMATION
 
     The Company has filed with the Commission a Registration Statement on Form
S-4 under the Securities Act for the registration of the Exchange Notes offered
hereby. This Prospectus, which constitutes a part of the Registration Statement,
does not contain all of the information set forth in the Registration Statement,
and certain information contained in the Registration Statement has been
omitted, as permitted by the rules and regulations of the Commission. For
further information with respect to the Company and the Exchange Notes offered
hereby, reference is made to the Registration Statement, including the exhibits
and financial statements, notes and schedules thereto filed as a part thereof or
incorporated by reference therein. This Prospectus contains summaries of
material terms and provisions of certain documents, including the
 
                                       110
<PAGE>   115
 
Registration Agreement and the Indenture. With respect to each such document
filed with the Commission as an exhibit to the Registration Statement, reference
is made to the exhibit for a more complete description of the matter involved.
The Registration Statement and the exhibits and schedules thereto may be
inspected without charge and copied at prescribed rates at the Public Reference
Section maintained by the Commission at Room 1024, 450 Fifth Street, N.W.,
Washington, D.C. 20549, the Commission's regional offices located at Seven World
Trade Center, 13th Floor, New York, New York 10048 and Northwestern Atrium
Center, 500 West Madison Street (Suite 1400), Chicago, Illinois 60661-2511. The
Commission maintains a Web Site that contains reports, proxy and information
statements and other information regarding registrants that file electronically
with the Commission. The address of such site is http://www.sec.gov.
 
     The principal executive offices of the Company are located at 7800 North
113th Street, P.O. Box 421, Milwaukee, Wisconsin, 53201, and the telephone
number is (414) 359-0600.
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED.
THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO EXCHANGE, OR A SOLICITATION OF
AN OFFER TO EXCHANGE, ANY SECURITIES OTHER THAN THE SECURITIES TO WHICH IT
RELATES OR AN OFFER TO EXCHANGE OR A SOLICITATION OF AN OFFER TO EXCHANGE SUCH
SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY EXCHANGE MADE HEREUNDER SHALL,
UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THE INFORMATION CONTAINED
HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF OR THAT THERE HAS
BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.
 
     The Indenture provides that the Company shall file with the Trustee and
provide holders of Notes, within 15 days after it files them with the
Commission, copies of its annual reports and the information, documents and
other reports that they are required to file with the Commission pursuant to
Section 13 or 15(d) of the Exchange Act. To the extent permitted by the Exchange
Act, the Company shall continue to file with the Commission and provide the
Trustee and holders with the annual reports and the information, documents and
other reports that are specified in Sections 13 and 15(d) of the Exchange Act.
In the event that the Company is not permitted to file such reports, documents
and information with the Commission or the Company has subsidiaries that
individually or in the aggregate would be deemed to be "substantial
subsidiaries" (as defined in Rule 1-02 of Regulation S-X, as in effect on June
23, 1998), the Company will provide substantially similar information with
respect to itself and its subsidiaries to the Trustee, holders and prospective
holders (upon written request) as if the Company were subject to the reporting
requirements of Section 13 or 15(d) of the Exchange Act. The Company shall also
comply with the other provisions of Trust Indenture Act Section 314(a).
 
                                       111
<PAGE>   116
 
                         INDEX TO FINANCIAL STATEMENTS
 
AQUA-CHEM, INC. AND SUBSIDIARIES AUDITED AND UNAUDITED CONSOLIDATED FINANCIAL
STATEMENTS
 
     The following audited and unaudited consolidated financial statements of
Aqua-Chem, Inc. and Subsidiaries are presented herein on the pages indicated
below:
 
<TABLE>
<S>                                                             <C>
  AUDITED FINANCIAL STATEMENTS
Report of Independent Public Accountants....................     F-2
Independent Auditors' Report................................     F-3
Consolidated Balance Sheets as of December 31, 1997 and
  1996......................................................     F-4
Consolidated Statements of Operations for the period August
  1, 1997 to December 31, 1997, the period January 1 to July
  31, 1997, and the years ended December 31, 1996 and
  1995......................................................     F-5
Consolidated Statements of Stockholders' Equity for the
  period August 1, 1997 to December 31, 1997, the period
  January 1 to July 31, 1997, and the years ended December
  31, 1996 and 1995.........................................     F-6
Consolidated Statements of Cash Flows for the period August
  1, 1997 to December 31, 1997, the period January 1 to July
  31, 1997, and the years ended December 31, 1996 and
  1995......................................................     F-7
Notes to Consolidated Financial Statements..................     F-8
  UNAUDITED FINANCIAL STATEMENTS
Consolidated Condensed Balance Sheets as of September 30,
  1998 and 1997.............................................    F-26
Consolidated Condensed Statements of Operations for the nine
  months ended September 30, 1998 and the period January 1
  to July 31, 1997 and the period August 1 to September 30,
  1997......................................................    F-27
Consolidated Condensed Statements of Cash Flows for the nine
  months ended September 30, 1998 and the period January 1
  to July 31, 1997 and the period August 1 to September 30,
  1997......................................................    F-28
Notes to Consolidated Condensed Financial Statements........    F-29
Schedule II -- Valuation and Qualifying Accounts............    F-32
Computation of Ratio of Earnings to Fixed Charges...........    F-33
</TABLE>
 
NATIONAL DYNAMICS CORPORATION AUDITED AND UNAUDITED FINANCIAL STATEMENTS
 
     The following audited and unaudited financial statements of National
Dynamics Corporation are presented herein on the pages indicated below:
 
<TABLE>
<S>                                                             <C>
  AUDITED FINANCIAL STATEMENTS
Independent Auditors' Report................................    F-34
Balance Sheets as of October 31, 1997 and 1996..............    F-35
Statements of Earnings and Retained Earnings for the years
  ended October 31, 1997, 1996 and 1995.....................    F-36
Statements of Cash Flows for the years ended October 31,
  1997, 1996 and 1995.......................................    F-37
Notes to Financial Statements...............................    F-38
  UNAUDITED FINANCIAL STATEMENTS
Condensed Balance Sheets as of March 31, 1998 and 1997......    F-43
Condensed Statements of Earnings for the five months ended
  March 31, 1998 and 1997...................................    F-44
Condensed Statements of Cash Flows for the five months ended
  March 31, 1998 and 1997...................................    F-45
Note to Condensed Financial Statements (Unaudited)..........    F-46
</TABLE>
 
                                       F-1
<PAGE>   117
 
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To the Board of Directors and
Shareholders of Aqua-Chem, Inc.:
 
We have audited the accompanying balance sheet of Aqua-Chem, Inc. and
subsidiaries as of December 31, 1997 and the related statements of operations,
stockholders' equity and cash flows for the period from August 1, 1997 to
December 31, 1997 and the period from January 1, 1997 to July 31, 1997. These
financial statements and the supplemental schedule referred to below are the
responsibility of Aqua-Chem's management. Our responsibility is to express an
opinion on these financial statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of Aqua-Chem, Inc. and
subsidiaries as of December 31, 1997, and the results of their operations and
their cash flows for the period August 1, 1997 to December 31, 1997 and the
period from January 1, 1997 to July 31, 1997, in conformity with generally
accepted accounting principles.
 
Our audits were made for the purpose of forming an opinion on the consolidated
financial statements taken as a whole. The supplemental schedule, Schedule II --
Valuation and Qualifying Accounts, is presented for purposes of complying with
the Securities and Exchange Commission's rules and is not a required part of the
basic financial statements. The supplemental schedule has been subjected to the
auditing procedures applied in the audits of the basic financial statements and,
in our opinion, fairly states in all material respects the financial data
required to be set forth therein in relation to the basic financial statements
taken as a whole.
 
                                          ARTHUR ANDERSEN LLP
 
Milwaukee, Wisconsin
March 4, 1998 (except with respect to
the matters discussed in Notes 16 and
18, as to which the date is May 28,
1998).
 
                                       F-2
<PAGE>   118
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors
Aqua-Chem, Inc.:
 
We have audited the accompanying consolidated balance sheet of Aqua-Chem, Inc.
and subsidiaries (80% owned subsidiary of Lyonnaise American Holding, Inc.) as
of December 31, 1996, and the related consolidated statements of operations,
stockholders' equity, and cash flows for each of the years in the two-year
period ended December 31, 1996, as listed in the accompanying index to financial
statements. In connection with our audits of the consolidated financial
statements, we also have audited the financial statement schedule, Schedule II
- -- Valuation and Qualifying Accounts, for each of the years in the two-year
period ended December 31, 1996, as listed in the accompanying index to financial
statements. These consolidated financial statements and financial statement
schedule are the responsibility of the Company's management. Our responsibility
is to express an opinion on these consolidated financial statements and
financial statement schedule based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Aqua-Chem, Inc. and
subsidiaries as of December 31, 1996, and the results of their operations and
their cash flows for each of the years in the two-year period ended December 31,
1996, in conformity with generally accepted accounting principles. Also in our
opinion, the related financial statement schedule, when considered in relation
to the basic consolidated financial statements taken as a whole, presents
fairly, in all material respects, the information set forth therein for each of
the years in the two-year period ended December 31, 1996.
 
                                   KPMG Peat Marwick LLP
 
Milwaukee, Wisconsin
January 24, 1997
 
                                       F-3
<PAGE>   119
 
                                AQUA-CHEM, INC.
                          CONSOLIDATED BALANCE SHEETS
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                              POST-ACQUISITION   PRE-ACQUISITION
                                                                  BASIS OF           BASIS OF
                                                                 ACCOUNTING         ACCOUNTING
                                                              ----------------   ----------------
                                                                DECEMBER 31,       DECEMBER 31,
                                                                    1997               1996
                                                                ------------       ------------
<S>                                                           <C>                <C>
ASSETS
- ------------------------------------------------------------
Current assets:
    Cash and cash equivalents                                     $ 11,936           $  8,627
    Accounts receivable, less allowances of $638 and $659 at
       December 31, 1997 and 1996                                   33,332             33,646
    Revenues in excess of billings                                   5,068              5,283
    Inventories                                                     20,814             21,652
    Deferred income taxes                                            4,237              4,884
    Prepaid expenses and other current assets                        1,093              2,180
                                                                  --------           --------
         Total current assets                                       76,480             76,272
Property, plant and equipment - net                                 31,555             21,866
Intangible assets, less accumulated amortization of $273 and
  $236 at December 31, 1997 and 1996                                10,174                647
Deferred income taxes                                                2,086                 --
Other assets                                                         4,366              2,215
                                                                  --------           --------
    TOTAL ASSETS                                                  $124,661           $101,000
                                                                  ========           ========
LIABILITIES AND STOCKHOLDERS' EQUITY
- ------------------------------------------------------------
Current liabilities:
    Current maturities on long-term debt                          $  1,055           $    440
    Accounts payable
       Trade                                                        10,685              9,647
       Other                                                         5,324              6,393
    Billings in excess of revenues                                   5,654              1,780
    Compensation and profit sharing                                  5,318              4,169
    Accrued litigation settlements                                   3,200                 --
    Accrued expenses                                                17,624             14,922
                                                                  --------           --------
         Total current liabilities                                  48,860             37,351
Long-term debt                                                      58,636             19,688
Deferred income taxes                                                   --              1,130
Other long-term liabilities                                          6,006              2,282
                                                                  --------           --------
                                                                    64,642             23,100
Minority interest                                                      589                589
Preferred stock with mandatory redemption provisions,
  maximum redemption value in aggregate of $15,255                   7,365                 --
Stockholders' equity:
    Common stock, $.01 par value. Authorized 2,000,000
       shares; issued and outstanding 1,000,000 shares at
       December 31, 1997                                                10                 --
    Common stock, $1.00 par value. Authorized 5,000 shares;
       issued and outstanding 1,300 shares at December 31,
       1996                                                             --                  1
    Additional paid-in capital                                          90             36,924
    Retained earnings                                                3,049              4,445
    Accumulated other comprehensive income                              56             (1,410)
                                                                  --------           --------
         Total stockholders' equity                                  3,205             39,960
                                                                  --------           --------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                        $124,661           $101,000
                                                                  ========           ========
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                       F-4
<PAGE>   120
 
                                AQUA-CHEM, INC.
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                   POST-
                                                ACQUISITION
                                                  BASIS OF
                                                 ACCOUNTING       PRE-ACQUISITION BASIS OF ACCOUNTING
                                                ------------   -----------------------------------------
                                                AUGUST 1 TO                    YEARS ENDED DECEMBER 31,
                                                DECEMBER 31,   JANUARY 1 TO    -------------------------
                                                    1997       JULY 31, 1997     1996            1995
                                                ------------   -------------     ----            ----
<S>                                             <C>            <C>             <C>             <C>
Net sales                                         $91,541         $99,618      $199,552        $183,368
Cost of goods sold                                 66,333          73,656       153,446         148,650
                                                  -------         -------      --------        --------
     Gross margin                                  25,208          25,962        46,106          34,718
Costs and expenses:
     Selling, general and administrative           17,136          23,323        34,446          37,772
     Restructuring charges                             --              --         5,038           4,593
                                                  -------         -------      --------        --------
                                                   17,136          23,323        39,484          42,365
Operating income (loss)                             8,072           2,639         6,622          (7,647)
Other income (expense):
     Interest income                                  202             450           464             358
     Interest expense                              (2,559)           (753)       (1,448)         (1,663)
     Other, net                                        57             110          (806)          2,635
                                                  -------         -------      --------        --------
                                                   (2,300)           (193)       (1,790)          1,330
Income (loss) before income taxes and minority
  interest                                          5,772           2,446         4,832          (6,317)
Income tax expense                                  2,289             421           507             189
Minority interest in earnings (loss) of
  consolidated subsidiary                             174             171           231             (52)
                                                  -------         -------      --------        --------
     Net income (loss)                            $ 3,309         $ 1,854      $  4,094        $ (6,454)
                                                  =======         =======      ========        ========
Preferred stock dividends                             260              --            --              --
     Net income (loss) applicable to common       $ 3,049         $ 1,854      $  4,094        $ (6,454)
                                                  =======         =======      ========        ========
Other comprehensive income (loss), net of tax
     Foreign currency translation adjustment           56            (404)         (770)            836
                                                  -------         -------      --------        --------
Comprehensive income (loss)                       $ 3,105         $ 1,450      $  3,324        $ (5,618)
                                                  =======         =======      ========        ========
PER SHARE DATA:
Basic net income per share of common stock        $  3.05            N.A.          N.A.            N.A.
                                                  =======
Diluted net income per share of common stock      $  2.59            N.A.          N.A.            N.A.
                                                  =======
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                       F-5
<PAGE>   121
 
                                AQUA-CHEM, INC.
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                   COMMON STOCK        ADDITIONAL
                                                                -------------------     PAID-IN      RETAINED
                                                                 SHARES      AMOUNT     CAPITAL      EARNINGS
                                                                ---------    ------    ----------    --------
<S>                                                             <C>          <C>       <C>           <C>
Pre-acquisition basis of accounting
Balance at December 31, 1994                                        1,300     $ 1       $ 36,924     $ 6,805
  Net loss                                                             --      --             --      (6,454)
                                                                ---------     ---       --------     -------
Balance at December 31, 1995                                        1,300       1         36,924         351
  Net income                                                           --      --             --       4,094
                                                                ---------     ---       --------     -------
Balance at December 31, 1996                                        1,300       1         36,924       4,445
  Net income                                                           --      --             --       1,854
                                                                ---------     ---       --------     -------
Balance at July 31, 1997                                            1,300     $ 1       $ 36,924     $ 6,299
                                                                =========     ===       ========     =======
Post-acquisition basis of accounting
Balance at July 31, 1997                                            1,300       1         36,924       6,299
  Cancellation of former equity and elimination of retained
    earnings and cumulative translation adjustment                 (1,300)     (1)       (36,924)     (6,299)
  Issuance of new common stock                                  1,000,000      10             90          --
  Preferred stock dividends accrued                                    --      --             --        (260)
  Net income                                                           --      --             --       3,309
                                                                ---------     ---       --------     -------
Balance at December 31, 1997                                    1,000,000     $10       $     90     $ 3,049
                                                                =========     ===       ========     =======
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                       F-6
<PAGE>   122
 
                                AQUA-CHEM, INC.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                 POST-
                                                              ACQUISITION
                                                                BASIS OF
                                                               ACCOUNTING    PRE-ACQUISITION BASIS OF ACCOUNTING
                                                              ------------   -----------------------------------
                                                                                                 YEARS ENDED
                                                              AUGUST 1 TO    JANUARY 1 TO       DECEMBER 31,
                                                              DECEMBER 31,     JULY 31,      -------------------
                                                                  1997           1997          1996       1995
                                                              ------------   -------------   --------   --------
<S>                                                           <C>            <C>             <C>        <C>
Cash flows from operating activities:
  Net income (loss)                                             $  3,309        $ 1,854      $ 4,094    $(6,454)
  Adjustments to reconcile net income (loss) to net cash
    provided by (used in) operating activities:
      Depreciation and amortization                                1,284          1,690        2,984      3,153
      Deferred tax (benefit) expense                              (1,784)            --           --        234
      Minority interest in earnings (loss) of consolidated
         subsidiary                                                  174            171          231        (52)
      Increase (decrease) in cash due to changes in:
         Accounts receivable                                      (4,852)         5,166           54      4,437
         Revenues in excess of billings                            3,096         (2,881)        (273)    (1,113)
         Inventories                                               3,473         (1,948)       8,463     (1,976)
         Prepaid expenses and other current assets                  (332)          (623)         (57)       737
         Accounts payable -- trade                                  (931)         1,969          212      1,954
         Accounts payable -- other                                   674         (1,743)      (3,415)     3,183
         Billings in excess of revenues                            1,624          2,250       (4,489)     3,784
         Accrued expenses and other current liabilities            3,800           (999)         880     (6,165)
         Other, net                                                 (224)           (49)        (632)    (3,273)
                                                                --------        -------      -------    -------
      Total adjustments                                            6,002          3,003        3,958      4,903
                                                                --------        -------      -------    -------
Net cash provided by (used in) operating activities                9,311          4,857        8,052     (1,551)
Cash flows from investing activities:
  Management Buy-Out of Aqua-Chem, Inc.                          (52,102)            --           --         --
  Proceeds from sales of property, plant and equipment and
    other assets                                                   2,000             73          203      3,639
  Additions to property, plant and equipment                      (1,197)        (2,195)      (2,789)    (4,867)
  Additions to intangibles                                           (50)          (270)          --         --
  Proceeds from notes receivable                                     650          1,511        1,561        289
                                                                --------        -------      -------    -------
Net cash used in investing activities                            (50,699)          (881)      (1,025)      (939)
Cash flows from financing activities:
  Proceeds from debt                                              65,573            118        2,232        538
  Principal payments on debt                                     (26,016)          (112)        (740)        --
  Issuance of common stock                                           100             --           --         --
  Issuance of warrants                                               433             --           --         --
  Issuance of preferred stock                                      2,655             --           --         --
  Deferred financing costs                                        (2,030)            --           --         --
                                                                --------        -------      -------    -------
Net cash provided by financing activities                         40,715              6        1,492        538
Net increase (decrease) in cash and cash equivalents                (673)         3,982        8,519     (1,952)
Cash and cash equivalents at beginning of period                  12,609          8,627          108      2,060
                                                                --------        -------      -------    -------
Cash and cash equivalents at end of period                      $ 11,936        $12,609      $ 8,627    $   108
                                                                ========        =======      =======    =======
Cash paid (received) during the period for:
  Interest                                                      $  2,513        $   658      $ 1,521    $ 1,601
                                                                ========        =======      =======    =======
  Taxes                                                         $  1,214        $    11      $  (123)   $(1,404)
                                                                ========        =======      =======    =======
Details of Management Buy-Out
  Fair value of assets acquired                                 $116,058
  Goodwill                                                         9,689
  Liabilities assumed                                            (69,196)
  Issuance of Series A Cumulative Preferred Stock                 (4,449)
                                                                --------
  Cash paid for assets                                          $ 52,102
                                                                ========
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                       F-7
<PAGE>   123
 
                                AQUA-CHEM, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
NOTE 1: MANAGEMENT BUY-OUT
 
     On July 31, 1997, Aqua-Chem, Inc. ("OLDCO") entered into a definitive
merger agreement with A-C Acquisition Corp. ("A-C Acquisition"), a 100% owned
subsidiary of Rush Creek LLC ("Rush Creek"). Rush Creek is a Limited Liability
Company owned by certain management of OLDCO and Whitney Equity Partners L.P.
Also on July 31, 1997, A-C Acquisition Corp. acquired the assets of OLDCO (the
"Management Buy-Out") for $125,747, which includes $69,196 of liabilities
assumed and $5,000 of Series A Cumulative Preferred Stock issued to the sellers.
The amount paid or assumed does not include contingent consideration to be paid
to the sellers based on cumulative earnings of certain operations of OLDCO
subsequent to the Management Buy-Out. Maximum additional consideration is $7,500
and will be settled as part of the Series B Cumulative Preferred Stock as
discussed in Note 11.
 
     Concurrently with the Management Buy-Out, A-C Acquisition amended its
certificate of incorporation to change its name to Aqua-Chem, Inc., (hereinafter
referred to as Aqua-Chem). The Management Buy-Out was accounted for by Aqua-Chem
using the purchase method of accounting. The total purchase cost was allocated
first to the identified tangible and intangible assets and liabilities of OLDCO
based upon their respective fair values, with the remainder of $9,689 being
allocated to goodwill, which will be amortized on a straight-line basis over 40
years. The financial statements reflect the preliminary estimates of allocating
purchase price and may be revised at a later date. Other than to reflect the
impact of the contingent consideration noted above, Aqua-Chem would not expect
the finalization of the purchase price allocation to be materially different
from preliminary estimates. The following information presents pro forma
condensed consolidated statements of operations assuming OLDCO had been acquired
by Aqua-Chem as of January 1, 1996. Such information includes adjustments to
reflect additional interest expense and depreciation expense, amortization of
goodwill and other intangibles and a reduction of other expenses due to
Management Buy-Out-related compensation payments being made by OLDCO.
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED      YEAR ENDED
                                                                DECEMBER 31,    DECEMBER 31,
                                                                    1997            1996
                                                                ------------    ------------
<S>                                                             <C>             <C>
Net sales                                                         $191,159        $199,552
Net income (loss) applicable to common shares                        2,980          (1,371)
Earnings (loss) per common share (basic)                              2.98            N.A.
Earnings (loss) per common share (diluted)                            2.53            N.A.
</TABLE>
 
     The above pro forma financial information is not necessarily indicative of
either the results of operations that would have occurred had the Management
Buy-Out been effective at the beginning of the periods presented or of future
operations of Aqua-Chem.
 
     Prior to the Management Buy-Out, OLDCO was an 80% owned subsidiary of
Lyonnaise American Holding, Inc.
 
NOTE 2: NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
 
     (a) Nature of Business
 
     Aqua-Chem primarily operates in two industry segments, (1) packaged
firetube and commercial and industrial watertube boilers ("Cleaver-Brooks") and
(2) water purification and desalination systems ("Water Technologies").
Aqua-Chem markets its products through a network of sales representatives,
distributors and an international direct sales force while maintaining
manufacturing facilities in the United States, Canada and Mexico.
 
                                       F-8
<PAGE>   124
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     (b) Basis of Presentation
 
     The consolidated financial statements for the period from January 1, 1997
to July 31, 1997 and for each of the years in the two-year period ended December
31, 1996, were prepared using OLDCO's historical basis of accounting (the
"pre-acquisition basis of accounting"). The consolidated financial statements
for the period from August 1, 1997 to December 31, 1997 were prepared under a
new basis of accounting that reflects the fair values of assets acquired and
liabilities assumed, the related financing costs and all debt incurred in
connection with the acquisition of OLDCO by Aqua-Chem (the "post-acquisition
basis of accounting"). Accordingly, the accompanying financial statements are
not comparable in all material respects since those financial statements report
financial position, results of operations, and cash flows of two separate
entities.
 
     (c) Consolidation Policy and Use of Estimates
 
     The consolidated financial statements include the accounts of Aqua-Chem and
all of its majority-owned subsidiaries. All significant intercompany accounts
and transactions have been eliminated in consolidation.
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets, liabilities and the
disclosure of commitments and contingent liabilities at the date of the
financial statements and the reported amounts of revenues and expenses during
the reporting period. Actual results could differ from those estimates.
 
     (d) Inventories
 
     Inventories are stated at cost determined on the first-in, first-out (FIFO)
basis. The resulting inventory values are not in excess of market. Inventory
cost includes material, labor, burden, and engineering.
 
     Inventories consist of the following:
 
<TABLE>
<CAPTION>
                                                             POST-            PRE-
                                                          ACQUISITION     ACQUISITION
                                                            BASIS OF        BASIS OF
                                                           ACCOUNTING      ACCOUNTING
                                                          ------------    ------------
                                                          DECEMBER 31,    DECEMBER 31,
                                                              1997            1996
                                                          ------------    ------------
<S>                                                       <C>             <C>
Raw materials and work-in-process                           $16,963         $17,834
Finished goods                                                3,851           3,818
                                                            -------         -------
     Total Inventories                                      $20,814         $21,652
                                                            =======         =======
</TABLE>
 
     (e) Property, Plant and Equipment
 
     Prior to August 1, 1997, property, plant and equipment was carried at cost,
less allowances for depreciation and adjustments to net realizable value, and
included expenditures which substantially increased the existing useful lives of
plant and equipment. Depreciation of plant and equipment was provided over the
estimated useful lives of the respective assets using accelerated methods for
both financial statement and income tax purposes.
 
     Effective with the Management Buy-Out, property, plant, and equipment was
adjusted to estimated fair values and is being depreciated on a straight-line
basis. Useful lives are 20 years for buildings and building improvements, 3 to
15 years for machinery and equipment, and 3 to 10 years for furniture and
fixtures. Leasehold improvements are depreciated over the term of the related
lease. Depreciation expense totaled $984, $1,622, $2,865, and $2,966 for the
period August 1 to December 31, 1997, the period January 1 to July 31, 1997, and
the years ended December 31, 1996 and 1995, respectively.
 
                                       F-9
<PAGE>   125
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     (f) Goodwill and Intangible Assets
 
     Goodwill is being amortized on a straight-line basis over 40 years. At
December 31, 1997, goodwill totaled $9,467, net of accumulated amortization of
$222. Amortization expense totaled $222 for the period August 1 to December 31,
1997.
 
     Prior to August 1, 1997, intangible assets, principally licenses and
technology, were carried at cost, less allowances for amortization. Amortization
of intangible assets was provided on the straight-line basis over the estimated
useful lives of the respective asset.
 
     Effective with the Management Buy-Out, intangible assets were adjusted to
estimated fair values and are being amortized on a straight-line basis over
estimated useful lives ranging from 5 to 17 years. At December 31, 1997 and
1996, intangibles totaled $707 and $647, respectively, net of accumulated
amortization of $51 and $236, respectively. Amortization expense totaled $51,
$68, $119, and $187 for the period August 1 to December 31, 1997, the period
January 1 to July 31, 1997, and the years ended December 31, 1996 and 1995,
respectively.
 
     (g) Income Taxes
 
     Aqua-Chem accounts for income taxes under Statement of Financial Accounting
Standards ("SFAS") No. 109, "Accounting for Income Taxes". Deferred tax assets
and liabilities are recognized for the future tax consequences attributable to
differences between the financial statement carrying amounts of existing assets
and liabilities and their respective tax bases, and operating loss and tax
credit carryforwards. Deferred tax assets and liabilities are measured using
enacted tax rates expected to apply to taxable income in the years in which
those temporary differences are expected to be recovered or settled. The effect
on deferred tax assets and liabilities of a change in tax rates is recognized in
income in the period that includes the enactment date. In assessing the
realizability of deferred tax assets, Aqua-Chem considers whether it is more
likely than not that some portion or all of the deferred tax assets will not be
realized. The ultimate realization of deferred tax assets is dependent upon the
generation of future taxable income during the years in which those temporary
differences become deductible. Aqua-Chem considers the scheduled reversal of
deferred tax liabilities, projected future taxable income, and tax planning
strategies in making this assessment.
 
     Prior to the Management Buy-Out, Aqua-Chem filed a consolidated United
States corporate income tax return with Lyonnaise American Holding, Inc.
(Parent). The tax liability was calculated consistent with the provisions of the
1984 tax allocation agreement with the Parent which provided for the allocation
of income tax expense (benefit) based principally on a consolidated return
basis.
 
     (h) Revenue Recognition
 
     Aqua-Chem recognizes revenue utilizing the completed contract method of
accounting, except for large, long-term contracts, for which the percentage of
completion method of revenue recognition is used. The completed contract method
is generally used for contracts which take less than one year to complete.
Revenue is recognized upon shipment of the finished product to the customer.
Under the percentage of completion method, earned revenue is based on the
percentage that incurred costs to date bear to estimates of total costs. The
cumulative impact of revisions in total cost estimates during the progress of
work is reflected in the year in which these changes become known. Earned
revenue reflects the original contract price adjusted for agreed upon change
order revenue, if any. Losses expected to be incurred on jobs in process, after
consideration of estimated recoveries on change orders, are charged to
operations as soon as such losses are known. Progress billings in accounts
receivable are currently due. Estimated revenues in excess of progress billings
and billings in excess of estimated revenues are disclosed in Note 5.
 
     Aqua-Chem has numerous contracts that are in various stages of completion.
Such contracts require estimates to determine the appropriate cost and revenue
recognition. Aqua-Chem has a substantial history of
 
                                      F-10
<PAGE>   126
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
making reasonably dependable estimates of the extent of progress towards
completion, contract revenues and contract costs. However, current estimates may
be revised as additional information becomes available.
 
     (i) Retainages
 
     Retainages are unpaid amounts due in accordance with the specific terms of
boiler contracts. Certain contracts provide for a percentage of the total
billing price to be retained by the customer until final acceptance of the
product. The amount of retainages included in Aqua-Chem's accounts receivable
balance was $1,485 and $1,034 at December 31, 1997 and 1996, respectively.
 
     (j) Foreign Currency Translation
 
     Substantially all assets and liabilities of foreign subsidiaries are
translated at the exchange rate prevailing at the balance sheet date and
substantially all income and expense accounts are translated at the average
exchange rate in effect during the year. Translation adjustments are accumulated
as a component of stockholders' equity or directly to the consolidated
statements of operations for those countries whose currency has been classified
as highly inflationary. Foreign exchange transaction gains(losses) were not
material for all periods presented in the consolidated statements of operations.
 
     (k) Commissions Payable
 
     Aqua-Chem's domestic and international sales representatives sell products
on a commission basis. The related commissions payable were $2,580 and $3,297 at
December 31, 1997 and 1996, respectively, and are included in accounts payable
- -- other.
 
     (l) Start-Up Accrual
 
     Included in the sales price of Aqua-Chem's products is an estimated future
cost to prepare the product for use. These future costs, referred to as start-up
costs, are accrued by Aqua-Chem at the time of sale. When the customer is ready
for start-up, the service is requested through the sales representative who
performs the necessary work to prepare the product for use. The sales
representative then bills Aqua-Chem for the cost of the work performed. At
December 31, 1997 and 1996, Aqua-Chem had accrued $3,751 and $3,583,
respectively, for future start-up costs, which are included in accrued expenses.
 
     (m) Warranty Costs
 
     Aqua-Chem accrues estimated warranty costs at the time of the sale.
Reserves for warranty costs were $3,646 and $4,257 at December 31, 1997 and
1996, respectively, and are included in accrued expenses.
 
     (n) Research and Development
 
     Research and development costs are expensed as incurred and are included in
selling, general, and administrative expenses. Research and development expense
totaled $872, $1,305, $2,244, and $1,992, for the period August 1 to December
31, 1997, the period January 1 to July 31, 1997, and the years ended December
31, 1996 and 1995, respectively.
 
     (o) Advertising
 
     Advertising costs are expensed as incurred and are included in selling,
general and administrative expenses. Advertising expense totaled $392, $625,
$856, and $1,538 for period August 1 to December 31, 1997, the period January 1
to July 31, 1997, and each of the years ended December 31, 1996 and 1995,
respectively.
 
     (p) Cash Equivalents
 
     For purposes of the consolidated statements of cash flows, Aqua-Chem
considers all highly liquid investments purchased with an original maturity of
three months or less to be cash equivalents.
                                      F-11
<PAGE>   127
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     (q) Impairment of Long-lived Assets.
 
     Effective January 1, 1996, Aqua-Chem adopted SFAS No. 121, "Accounting for
the Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed
Of." SFAS No. 121 requires that long-lived assets and certain identifiable
intangibles held and used by a company be reviewed for possible impairment
whenever events or changes in circumstances indicate that the carrying amount of
an asset may not be recoverable. SFAS No. 121 also requires that long-lived
assets and certain identifiable intangibles be reported at the lower of carrying
amount or fair value less costs to sell. Aqua-Chem evaluates its long-lived
assets when changes in circumstances may indicate that the carrying amount of an
asset may not be recoverable. Adoption of this standard did not have a material
impact on Aqua-Chem's financial position or results of operations.
 
     (r) Fair Value of Financial Instruments
 
     The carrying amounts of financial instruments approximate fair value due to
the short maturity of these instruments unless otherwise stated. The carrying
amounts of the long-term debt and short-term borrowings approximate fair value
because their stated interest rates approximate current rates for similar
instruments with similar maturities as of December 31, 1997 and 1996.
 
     (s) New Accounting Pronouncements
 
     Effective December 31, 1997, Aqua-Chem adopted Statement of Financial
Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS No. 130").
This statement establishes standards for reporting and display of comprehensive
income which includes foreign currency translation adjustments accounted for
under SFAS No. 52. SFAS No. 130 requires that an enterprise classify items of
other comprehensive income by their nature in a financial statement for the
period in which they are recognized. Aqua-Chem has chosen to disclose
comprehensive income in the Consolidated Statements of Operations. Accumulated
other comprehensive income at December 31, 1997 and 1996 is comprised of only
foreign currency translation adjustments. Prior years have been restated to
conform to the SFAS No. 130 requirements.
 
     (t) Legal Defense Costs
 
     The Company expenses legal defense costs in connection with legal
proceedings, claims, and litigation arising in the ordinary course of business
as incurred.
 
     (u) Reclassifications
 
     Certain 1996 and 1995 amounts as originally reported have been reclassified
to conform with the 1997 presentation.
 
NOTE 3: RESTRUCTURING CHARGES
 
     During 1994, Aqua-Chem adopted a restructuring plan ("1994 Plan") to reduce
its manufacturing costs and excess capacity within Cleaver-Brooks resulting in
charges of $4,593 and $9,011 in 1995 and 1994,
 
                                      F-12
<PAGE>   128
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
respectively. The 1994 Plan resulted in the elimination of 180 positions and the
closure of the Lebanon facility in June of 1995. A summary of restructuring
activity for the 1994 Plan is as follows:
<TABLE>
<CAPTION>
                                                  1995 ACTIVITY                                     1996 ACTIVITY
                       -------------------------------------------------------------------   ---------------------------
                        BALANCE AT                                             BALANCE AT                    BALANCE AT
                       DECEMBER 31,   CHANGE IN   ADDITIONAL                  DECEMBER 31,                  DECEMBER 31,
                           1994       ESTIMATE     CHARGES     EXPENDITURES       1995       EXPENDITURES       1996
                       ------------   ---------   ----------   ------------   ------------   ------------   ------------
<S>                    <C>            <C>         <C>          <C>            <C>            <C>            <C>
Employee termination
  benefits                $4,736        $(891)      $  606       $(3,686)        $  765         $(231)         $  534
Costs related to
  closing/selling the
  facility                 1,381           --        1,565        (2,220)           726          (256)            470
Other restructuring
  costs                      251          891        2,422        (3,564)            --            --              --
                          ------        -----       ------       -------         ------         -----          ------
Total restructuring
  reserve                 $6,368        $  --       $4,593       $(9,470)        $1,491         $(487)         $1,004
                          ======        =====       ======       =======         ======         =====          ======
 
<CAPTION>
                                   1997 ACTIVITY
                       -------------------------------------
                                                  BALANCE AT
                       CHANGE IN                   JULY 31,
                       ESTIMATE    EXPENDITURES      1997
                       ---------   ------------   ----------
<S>                    <C>         <C>            <C>
Employee termination
  benefits               $119            --         $  653
Costs related to
  closing/selling the
  facility                 --           (97)           373
Other restructuring
  costs                    --            --             --
                         ----          ----         ------
Total restructuring
  reserve                $119          $(97)        $1,026
                         ====          ====         ======
</TABLE>
 
     During 1996, Aqua-Chem adopted a separate restructuring plan ("1996 Plan")
focused on improving overall performance and profitability. The 1996 Plan
included an early retirement program for 47 salaried individuals and certain
organizational changes within its operating units. As a result, restructuring
charges of $5,038 were incurred in 1996. A summary of restructuring activity for
the 1996 Plan is as follows:
 
<TABLE>
<CAPTION>
                                                    1996 ACTIVITY                      1997 ACTIVITY
                                        -------------------------------------   ----------------------------
                                                                  BALANCE AT
                                        INITIAL                  DECEMBER 31,                   BALANCE AT
                                        CHARGES   EXPENDITURES       1996       EXPENDITURES   JULY 31, 1997
                                        -------   ------------   ------------   ------------   -------------
<S>                                     <C>       <C>            <C>            <C>            <C>
Employee termination benefits           $3,045      $(1,915)        $1,130         $(588)          $542
Professional services                    1,993       (1,993)            --            --             --
                                        ------      -------         ------         -----           ----
Total restructuring reserve             $5,038      $(3,908)        $1,130         $(588)          $542
                                        ======      =======         ======         =====           ====
</TABLE>
 
     The balances in the reserves for the 1994 and 1996 Plans are included in
accrued expenses at December 31, 1996.
 
     As a result of the Management Buy-Out, liabilities were established for the
balance in the reserves for the 1994 and 1996 Plans which are included in
accrued expenses at December 31, 1997.
 
NOTE 4: DIVESTITURES
 
     During 1995, Aqua-Chem sold a product line and several sales territories
and recognized gains totaling $2,240. These gains, which included the disposal
of $572 of intangible assets, are included in other income in the consolidated
statements of operations. Notes receivable related to these sales were $325 and
$2,573 as of December 31, 1997 and 1996, respectively. Of these notes, $156 and
$1,309 are current and are included in prepaid expenses and other current assets
at December 31, 1997 and 1996, respectively.
 
                                      F-13
<PAGE>   129
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
NOTE 5: CONTRACTS IN PROGRESS
 
     Components of contracts in progress, the majority of which are accounted
for under the percentage of completion method of revenue recognition, are as
follows:
 
<TABLE>
<CAPTION>
                                                   POST-ACQUISITION       PRE-ACQUISITION
                                                       BASIS OF              BASIS OF
                                                      ACCOUNTING            ACCOUNTING
                                                   ----------------       ---------------
                                                     DECEMBER 31,          DECEMBER 31,
                                                         1997                  1996
                                                   ----------------       ---------------
<S>                                                <C>                    <C>
Revenues in Excess of Billings
  Costs and estimated earnings                         $76,996                $65,396
  Billings                                              71,928                 60,113
                                                       -------                -------
                                                       $ 5,068                $ 5,283
                                                       =======                =======
Billings in Excess of Revenues
  Billings                                             $29,139                $33,478
  Costs and estimated earnings                          23,485                 31,698
                                                       -------                -------
                                                       $ 5,654                $ 1,780
                                                       =======                =======
</TABLE>
 
     All receivables on contracts in progress are considered to be collectible
within twelve months. At December 31, 1997 and 1996, Aqua-Chem has accrued
estimated cumulative losses on contracts of $0 and $7,900, respectively, which
are primarily included within billings in excess of revenues and as a write-down
to inventory.
 
NOTE 6: PROPERTY, PLANT AND EQUIPMENT
 
     Property, plant and equipment consists of the following:
 
<TABLE>
<CAPTION>
                                                   POST-ACQUISITION       PRE-ACQUISITION
                                                       BASIS OF              BASIS OF
                                                      ACCOUNTING            ACCOUNTING
                                                   ----------------       ---------------
                                                     DECEMBER 31,          DECEMBER 31,
                                                         1997                  1996
                                                   ----------------       ---------------
<S>                                                <C>                    <C>
Land and land improvements                             $ 1,872                $ 1,643
Buildings and building improvements                      9,715                 14,090
Leasehold improvements                                   1,120                    170
Machinery and equipment                                 15,700                 29,263
Furniture and fixtures                                   4,058                  7,159
                                                       -------                -------
                                                        32,465                 52,325
Less accumulated depreciation                             (910)               (30,459)
                                                       -------                -------
                                                       $31,555                $21,866
                                                       =======                =======
</TABLE>
 
NOTE 7: LEASES
 
     Aqua-Chem leases its corporate offices under a fifteen year operating lease
with two five-year renewal options. This building is owned by a partnership in
which Aqua-Chem has a limited interest.
 
                                      F-14
<PAGE>   130
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     The future minimum payments under noncancellable operating leases with
initial or remaining terms in excess of one year are as follows:
 
<TABLE>
<S>                                                           <C>
1998                                                          $1,468
1999                                                           1,382
2000                                                           1,026
2001                                                             961
2002                                                             839
Thereafter                                                     2,095
                                                              ------
Total minimum rental commitments                              $7,771
                                                              ======
</TABLE>
 
     Total rent expense for all operating leases was $632 and $891 for the
period from August 1, 1997 to December 31, 1997, and for the period from January
1, 1997 to July 31, 1997, respectively. Total rent expense for all operating
leases for the years ended December 31, 1996 and 1995 was $1,292 and $1,421,
respectively.
 
NOTE 8: SHORT TERM BORROWINGS
 
     In 1996 and 1995, and in the period January 1 through July 31, 1997,
Aqua-Chem had an unsecured revolving credit agreement for up to $15,000 which
was terminated in conjunction with the Management Buy-Out. No amounts were
outstanding under this revolving credit agreement at December 31, 1996. Interest
under this revolving credit agreement was based on the prime rate, LIBOR or an
adjusted certificate of deposit rate plus a defined interest premium factor.
 
     Aqua-Chem also had available in 1996 and 1995, and in the period January 1
through July 31, 1997 an additional unsecured bank line of credit of $6,500. No
amounts were outstanding under this line of credit at December 31, 1996. This
agreement also was terminated in conjunction with the Management Buy-Out.
 
NOTE 9: LONG-TERM DEBT
 
     Long-term debt consists of the following:
 
<TABLE>
<CAPTION>
                                                   POST-ACQUISITION       PRE-ACQUISITION
                                                       BASIS OF              BASIS OF
                                                      ACCOUNTING            ACCOUNTING
                                                   ----------------       ---------------
                                                     DECEMBER 31,          DECEMBER 31,
                                                         1997                  1996
                                                   ----------------       ---------------
<S>                                                <C>                    <C>
Secured term loan                                      $39,000                     --
Unsecured term loan                                         --                $16,000
Revolving Credit Agreement                                  --                     --
Subordinated debt                                       21,000                     --
Less: Unamortized portion of original issue
  discount                                                (427)                    --
Industrial revenue bonds                                    --                  4,128
Note payable                                               118                     --
                                                       -------                -------
Total long-term debt                                    59,691                 20,128
Less: Current maturities                                (1,055)                  (440)
                                                       -------                -------
     Long-term debt                                    $58,636                $19,688
                                                       =======                =======
</TABLE>
 
     As part of the Management Buy-Out, Aqua-Chem entered into a revolving
credit agreement and a $40,000 secured term loan. The secured term loan is
payable in quarterly principal installments commencing on October 1, 1998,
through June 30, 2003. The term loan bears interest at the eurocurrency rate
(6.425% at December 31, 1997) plus 1.825%, payable in quarterly installments,
commencing on October 1, 1997.
 
                                      F-15
<PAGE>   131
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
Mandatory prepayments are required if Aqua-Chem has excess cash flow from
operations or receives cash from certain asset dispositions, as defined by the
agreement. The term loan is secured by the assets of Aqua-Chem. At December 31,
1997, $39,000 was outstanding under the term loan. Among other restrictions, the
credit agreements contain covenants relating to financial ratios and other
limitations, as defined by the agreement. As of December 31, 1997, Aqua-Chem was
in compliance with these covenants.
 
     The revolving credit agreement allows maximum advances of $20,000, subject
to certain restrictions, to be made in the form of revolving credit notes. These
notes bear interest at a rate of either eurocurrency plus a factor as defined in
the agreement, prime plus a factor as defined in the agreement or the lender's
going rate. The revolving credit agreement will terminate on July 31, 2002. As
of December 31, 1997, there were no borrowings outstanding under the revolving
credit agreement.
 
     Concurrent with the Management Buy-Out, Aqua-Chem issued seven year,
unsecured, subordinated notes payable bearing interest at 10.5%, payable
quarterly. A principal payment of $21,000 is due July 30, 2004, or upon the
consummation of an initial public offering or a change in ownership control.
Certain covenant requirements include the limitation of senior indebtedness as
defined in the note. As of December 31, 1997, Aqua-Chem was in compliance with
the covenant requirements.
 
     The unsecured term loan, which bore interest at 6.25% at December 31, 1996,
was repaid in a single payment of $16,000 as part of the Management Buy-Out.
 
     The industrial revenue bonds (IRBs), which bore interest at 5.31% at
December 31, 1996, were issued on October 18, 1995 in the amount of $3,000 and
on September 21, 1995 in the amount of $1,900, for expansions and improvements
at Aqua-Chem's Thomasville, GA and Monroe, WI manufacturing facilities,
respectively. The IRBs required combined annual principal payments of $440. The
IRBs were fully collateralized by certain buildings and equipment. As of the
Management Buy-Out date, the outstanding balances were fully escrowed and
subsequently paid on September 4, 1997.
 
     A summary of the minimum annual principal repayments of long-term debt at
December 31, 1997, is as follows:
 
<TABLE>
<S>                    <C>
1998                   $ 1,055
1999                     4,781
2000                     7,282
2001                     8,500
2002                    10,250
Thereafter              27,823
                       -------
                       $59,691
                       =======
</TABLE>
 
                                      F-16
<PAGE>   132
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
NOTE 10: INCOME TAXES
 
     The sources of income (loss) before income taxes and minority interest were
as follows:
 
<TABLE>
<CAPTION>
                                                      POST-
                                                   ACQUISITION
                                                     BASIS OF     PRE-ACQUISITION BASIS OF ACCOUNTING
                                                    ACCOUNTING    ------------------------------------
                                                   ------------                   YEARS ENDED DECEMBER
                                                   AUGUST 1 TO                            31,
                                                   DECEMBER 31,   JANUARY 1 TO    --------------------
                                                       1997       JULY 31, 1997    1996         1995
                                                   ------------   -------------   ------       -------
<S>                                                <C>            <C>             <C>          <C>
U.S. sources                                          $5,058         $1,661       $3,535       $(6,417)
Foreign sources                                          714            785        1,297           100
                                                      ------         ------       ------       -------
Income (loss) before income taxes and minority
  interest                                            $5,772         $2,446       $4,832       $(6,317)
                                                      ======         ======       ======       =======
</TABLE>
 
     The provision (benefit) for income taxes consisted of the following:
 
<TABLE>
<CAPTION>
                                           POST-
                                        ACQUISITION
                                          BASIS OF     PRE-ACQUISITION BASIS OF ACCOUNTING
                                         ACCOUNTING    -----------------------------------
                                        ------------                       YEARS ENDED
                                        AUGUST 1 TO                        DECEMBER 31,
                                        DECEMBER 31,    JANUARY 1 TO    ------------------
                                            1997       JULY 31, 1997    1996         1995
                                        ------------   --------------   -----       ------
<S>                                     <C>            <C>              <C>         <C>
Current:
  United States                           $ 3,258             --        $109        $(234)
  Foreign                                     215           $271         310          142
  State                                       600            150          88           47
                                          -------           ----        ----        -----
     Total current                          4,073            421         507          (45)
                                          -------           ----        ----        -----
Deferred:
  United States                            (1,507)            --          --          234
  Foreign                                      --             --          --           --
  State                                      (277)            --          --           --
                                          -------           ----        ----        -----
     Total deferred                        (1,784)            --          --          234
                                          -------           ----        ----        -----
Total income tax provision                $ 2,289           $421        $507        $ 189
                                          =======           ====        ====        =====
</TABLE>
 
     Total income tax expense differs from amounts expected by applying the
Federal statutory income tax rate to income (loss) before income taxes and
minority interest, as set forth in the following table.
 
<TABLE>
<CAPTION>
                                    POST-ACQUISITION
                                   BASIS OF ACCOUNTING                   PRE-ACQUISITION BASIS OF ACCOUNTING
                                  ---------------------    ---------------------------------------------------------------
                                                                                         YEARS ENDED DECEMBER 31,
                                       AUGUST 1 TO            JANUARY 1 TO       -----------------------------------------
                                    DECEMBER 31, 1997         JULY 31, 1997             1996                  1995
                                  ---------------------    -------------------   -------------------   -------------------
                                     TAX                      TAX                   TAX                   TAX
                                   EXPENSE                  EXPENSE               EXPENSE               EXPENSE
                                  (BENEFIT)    PERCENT     (BENEFIT)   PERCENT   (BENEFIT)   PERCENT   (BENEFIT)   PERCENT
                                  ---------    --------    ---------   -------   ---------   -------   ---------   -------
<S>                               <C>          <C>         <C>         <C>       <C>         <C>       <C>         <C>
Tax expense (benefit) at
  Federal statutory rate           $1,962       34.0%        $ 832       34.0%    $ 1,643      34.0%    $(2,148)    (34.0)%
Alternative minimum tax                --          --           --         --          96       2.0          --        --
</TABLE>
 
                                      F-17
<PAGE>   133
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                    POST-ACQUISITION
                                   BASIS OF ACCOUNTING                   PRE-ACQUISITION BASIS OF ACCOUNTING
                                  ---------------------    ---------------------------------------------------------------
                                                                                         YEARS ENDED DECEMBER 31,
                                       AUGUST 1 TO            JANUARY 1 TO       -----------------------------------------
                                    DECEMBER 31, 1997         JULY 31, 1997             1996                  1995
                                  ---------------------    -------------------   -------------------   -------------------
                                     TAX                      TAX                   TAX                   TAX
                                   EXPENSE                  EXPENSE               EXPENSE               EXPENSE
                                  (BENEFIT)    PERCENT     (BENEFIT)   PERCENT   (BENEFIT)   PERCENT   (BENEFIT)   PERCENT
                                  ---------    --------    ---------   -------   ---------   -------   ---------   -------
<S>                               <C>          <C>         <C>         <C>       <C>         <C>       <C>         <C>
Impact of foreign subsidiary
  income and tax rates                (27)       (0.5)           4        0.2        (131)     (2.7)        109       1.7
Change in estimate of prior
  year taxes                           --          --           --         --          --        --        (279)     (4.4)
Change in valuation allowance          --          --         (604)     (24.7)     (1,196)    (24.7)      2,323      36.8
State income taxes, net of
  Federal income tax benefit          215         3.7          150        6.1          88       1.8          47       0.7
Management Buy-Out goodwill
  amortization                         78         1.4           --         --          --        --          --        --
Other items                            61         1.1           39        1.6           7       0.1         137       2.2
                                   ------        ----        -----      -----     -------     -----     -------     -----
Total income tax expense           $2,289       39.7%        $ 421       17.2%    $   507      10.5%    $   189       3.0%
                                   ======        ====        =====      =====     =======     =====     =======     =====
</TABLE>
 
     The tax effects of temporary differences that give rise to significant
portions of the deferred tax assets and liabilities are presented below:
 
<TABLE>
<CAPTION>
                                                 POST-ACQUISITION       PRE-ACQUISITION
                                                BASIS OF ACCOUNTING   BASIS OF ACCOUNTING
                                                -------------------   -------------------
                                                   DECEMBER 31,          DECEMBER 31,
                                                       1997                  1996
                                                   ------------          ------------
<S>                                             <C>                   <C>
Deferred tax assets
  Inventory                                           $  289                $   526
  Employee benefits                                    3,029                  1,291
  Litigation settlements                               1,558                     --
  Start-up and warranty expenses                         743                  1,526
  Restructuring charges                                  481                    633
  Net operating loss carryforward                         --                  3,023
  Other                                                  970                    435
                                                      ------                -------
Total deferred tax assets                              7,070                  7,434
Less -- valuation allowance                               --                 (1,224)
                                                      ------                -------
     Total deferred tax assets                         7,070                  6,210
Deferred tax liabilities
  Contract related transactions                         (112)                  (500)
  Property, plant and equipment                         (494)                (1,875)
  Other                                                 (141)                   (81)
                                                      ------                -------
     Total deferred tax liabilities                     (747)                (2,456)
                                                      ------                -------
Net deferred tax asset                                $6,323                $ 3,754
                                                      ======                =======
</TABLE>
 
                                      F-18
<PAGE>   134
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     The classification of the net deferred tax asset is as follows:
 
<TABLE>
<CAPTION>
                                                 POST-ACQUISITION       PRE-ACQUISITION
                                               BASIS OF ACCOUNTING    BASIS OF ACCOUNTING
                                               --------------------   --------------------
                                                   DECEMBER 31,           DECEMBER 31,
                                                       1997                   1996
                                               --------------------   --------------------
<S>                                            <C>                    <C>
Current deferred tax asset                            $4,237                $ 4,884
Long-term deferred tax asset                           2,086                     --
Long-term deferred tax liability                          --                 (1,130)
                                                      ------                -------
     Net deferred tax asset                           $6,323                $ 3,754
                                                      ======                =======
</TABLE>
 
     During 1995, Aqua-Chem incurred a tax net operating loss. Due to a January
1996 modification to the existing tax allocation agreement between Aqua-Chem and
the Parent, a carryback of the loss would not have resulted in a refund of cash
to Aqua-Chem. Accordingly, Aqua-Chem elected to carry the tax loss forward and a
valuation allowance was established.
 
     During the period January 1, 1997 through July 31, 1997 and the year ended
December 31, 1996, Aqua-Chem had sufficient income to realize the value of a
portion of the net operating loss. Accordingly, the valuation reserve was
reduced in both periods by the amount of the benefit realized.
 
NOTE 11: STOCKHOLDERS' EQUITY AND PREFERRED STOCK WITH MANDATORY REDEMPTION
PROVISIONS
 
     As of December 31, 1997, Aqua-Chem has 2,006,260 shares of authorized
capital stock, itemized by class and series as follows:
 
     (i)  2,000,000 shares of Common Stock, par value $.01 per share, with
          1,000,000 shares issued and outstanding;
 
     (ii) 6,260 shares of Preferred Stock, par value $.01 per share, divided
          into the following series:
 
        (a) 130 shares of Series A Cumulative Preferred Stock, par value $0.01
            per share, with 130 shares issued and outstanding.
 
        (b) 130 shares of Series B Cumulative Preferred Stock, par value $0.01
            per share, with 130 shares issued and outstanding.
 
        (c) 6,000 shares of Series C Cumulative Preferred Stock, par value $.01
            per share, with 2,755 shares issued and outstanding.
 
     Holders of the nonvoting Series A Cumulative Preferred Stock ("Preferred
A") are entitled to receive cumulative cash dividends of $2,307.70 per share per
year beginning August 1, 1997 payable at redemption. Holders of Preferred A
generally have the right to require Aqua-Chem to redeem the Preferred A at the
$5,000 Redemption Price plus accrued dividends (i) simultaneous with the
occurrence of an "overall ownership shift," "employee ownership shift" or "asset
shift" (each as defined by Aqua-Chem's Certificate of Incorporation); (ii)
within the 120 day period following an initial public offering of Aqua-Chem's
equity securities; (iii) within the 120 day period following a refinancing and
retirement of the subordinated notes payable (see Note 9); or (iv) July 31,
2004. Aqua-Chem may call the outstanding shares at any time at the redemption
price of $5,000 plus accrued dividends. As the Preferred A carries a below
market dividend rate of 6%, Aqua-Chem recorded the Preferred A at a discount.
Aqua-Chem is accreting the discount over the term of the Preferred A with the
accretion charged to retained earnings. The carrying value, including accretion
and dividends, of the Preferred A at December 31, 1997 is $4,594.
 
                                      F-19
<PAGE>   135
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     Holders of the nonvoting Series B Cumulative Preferred Stock ("Preferred
B") are entitled to receive cumulative cash dividends of $1,538.47 per share per
year beginning August 1, 1997 payable at redemption. The redemption price of the
Preferred B shall be the "Normal Redemption Price," which shall generally be
based upon Aqua-Chem's Water Technologies division's cumulative earnings before
income taxes ("EBIT") for the period 1997 through 2001. The redemption price is
modified in the event that prior to December 31, 2001, either (i) the business
of Aqua-Chem's Water Technologies division is sold to an unrelated third party;
or (ii) there occurs an "overall ownership shift," "employee ownership shift" or
"asset shift" (each as defined by Aqua-Chem's Certificate of Incorporation). The
maximum redemption price, under any circumstance, shall be $7,500. The Holders
of Preferred B generally shall have the right to require Aqua-Chem to redeem the
Preferred B at the applicable Redemption Price plus accrued dividends (i)
simultaneous with the occurrence of an "overall ownership shift" (as defined by
Aqua-Chem's Certificate of Incorporation); (ii) within the 120 day period
following an initial public offering of Aqua-Chem's equity securities; (iii)
within the 120 day period following a refinancing and retirement of the
subordinated notes payable (see Note 9); or (iv) July 31, 2004. The carrying
value of the Preferred B is zero at December 31, 1997, as the redemption value
is contingent upon future events.
 
     Holders of Series C Cumulative Preferred Stock ("Preferred C") are entitled
to receive quarterly cash dividends payable at redemption at the rate of 10.17%
per year on the original issue price per share ($964) beginning on August 1,
1997. The holders of the Preferred C generally shall have the right to require
Aqua-Chem to redeem all or any part of the Preferred C at a price equal to
$1,000 per share, plus accrued dividends upon (i) an "overall ownership shift,"
"employee ownership shift," or "asset shift" (each as defined by Aqua-Chem's
Certificate of Incorporation); (ii) within the 120-day period following an
initial public offering; or (iii) July 31, 2005. Any time after July 31, 2004,
Aqua-Chem may call the outstanding shares at the redemption price of $1,000 per
share plus accrued dividends. Holders of the Preferred C are entitled to voting
rights equivalent to the rights of one share of common stock. As the redemption
price of $1,000 per share exceeds the original issue price of $964, Aqua-Chem
recorded the Preferred C at a discount. Similar to the Preferred A, Aqua-Chem is
accreting the discount over the term of the Preferred C with the accretion
charged to retained earnings. The carrying value, including dividends, of the
Preferred C at December 31, 1997 is $2,771.
 
NOTE 12: STOCK OPTIONS
 
     In connection with the Management Buy-Out, Aqua-Chem adopted the Aqua-Chem,
Inc. 1997 Stock Option Plan (the "Plan"), which provides for the granting to key
employees, directors, and other individuals of options to purchase an aggregate
of 61,919 shares of Aqua-Chem common stock at a purchase price not less than the
greater of (i) $3.75, or (ii) fair market value as determined by the Plan.
Options vest primarily based upon Aqua-Chem achieving certain operating results
or within 7 years from the date of grant. As of December 31, 1997, there were no
options granted or outstanding under the Plan.
 
     Under a separate agreement from the Plan, the option to purchase 600 shares
of common stock was granted to a director of Aqua-Chem. These options, which
vest one year after the effective date of the grant, allow the holder to
purchase common stock of Aqua-Chem at $3.75 per share, which does not differ
significantly from fair market value. As of December 31, 1997, no options were
exercised.
 
NOTE 13: COMMON STOCK PURCHASE WARRANTS
 
     The holders of the subordinated notes payable (see Note 9) also received
warrants, whereby they can acquire, at any time through July 31, 2007, in total,
176,471 shares of Aqua-Chem's common stock. The exercise price issuable upon
exercise of the warrants is $.01 per share of stock, with adjustments made to
prevent dilution in the event of any changes in capitalization of Aqua-Chem.
 
                                      F-20
<PAGE>   136
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     After July 31, 2002, there are put and call features that may require
Aqua-Chem to purchase all or any part of warrants or the common stock obtained
by the exercise of such warrants at the higher of a price determined in the
agreement or the fair market value of the Company's stock. During the period
August 1, 1997 to December 31, 1997, no warrants were exercised.
 
     The warrants were recorded as an increase to other long-term liabilities at
their approximate fair value at the date of issuance.
 
NOTE 14: EMPLOYEE BENEFIT PLANS
 
     (a) Pension Plans
 
     Aqua-Chem is required to make payments to certain pension and employee
benefit funds, some of which are not controlled or administered by Aqua-Chem and
certain foreign subsidiary maintained government-mandated pension plans. Pension
expense of these plans for the period August 1 to December 31, 1997 and the
period January 1 to July 31, 1997, and for the years ended December 31, 1996 and
1995 was $189, $140, $266 and $233, respectively.
 
     (b) Retirement and Savings Plans
 
     Aqua-Chem maintains a defined contribution retirement plan which includes a
401(k) savings plan. Substantially all employees who are not members of
collective bargaining groups are eligible to participate. Aqua-Chem's retirement
contribution equals 4% of eligible compensation while 401(k) contributions equal
50% of employee contributions to a maximum Aqua-Chem contribution of 3%. Under
provisions of the 401(k) savings plan, employees may voluntarily contribute a
maximum of 13% of eligible compensation. From the period August 1, 1997 to
December 31, 1997, and the period January 1, 1997 to July 31, 1997, Aqua-Chem
contributed $675 and $910, respectively, to this plan. Aqua-Chem contributed
$1,462 and $1,534 for each of the years ended December 31, 1996 and 1995,
respectively.
 
     (c) Postretirement Health Care Plans
 
     Aqua-Chem maintains unfunded health care plans covering certain eligible
retirees and employees. The estimated costs of postretirement benefits,
principally health care, are accrued over the period the benefits are earned.
Aqua-Chem's policy is to fund postretirement benefits as incurred.
 
     The net periodic postretirement benefit cost included the following
components:
 
<TABLE>
<CAPTION>
                                                         POST-
                                                      ACQUISITION
                                                        BASIS OF     PRE-ACQUISITION BASIS OF ACCOUNTING
                                                       ACCOUNTING    -----------------------------------
                                                      ------------                       YEARS ENDED
                                                      AUGUST 1 TO                        DECEMBER 31,
                                                      DECEMBER 31,    JANUARY 1 TO    ------------------
                                                          1997       JULY 31, 1997    1996         1995
                                                      ------------   -------------    ----         ----
<S>                                                   <C>            <C>              <C>         <C>
  Service cost benefits attributed to service during
     the year                                             $  6            $  9        $ 24        $  19
  Interest cost on accumulated postretirement
     benefit obligation                                    139             203         500          520
  Amortization of transition obligation                     --             248         426          426
  Amortization of unrecognized gain                         --            (140)        (75)        (123)
                                                          ----            ----        ----        -----
Net periodic postretirement benefit cost                  $145            $320        $875        $ 842
                                                          ====            ====        ====        =====
</TABLE>
 
                                      F-21
<PAGE>   137
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
     As a result of the plans being unfunded, the liability of the plans was as
follows:
 
<TABLE>
<CAPTION>
                                                  POST-ACQUISITION       PRE-ACQUISITION
                                                BASIS OF ACCOUNTING    BASIS OF ACCOUNTING
                                                --------------------   -------------------
                                                    DECEMBER 31,          DECEMBER 31,
                                                        1997                  1996
                                                    ------------          ------------
<S>                                             <C>                    <C>
Accumulated postretirement benefit obligation:
  Retirees                                             $4,261                $ 4,359
  Fully eligible active plan participants                 106                     99
  Other active plan participants                          340                    302
Unrecognized transition obligation                         --                 (6,695)
Unrecognized net gain (loss)                              (49)                 4,217
                                                       ------                -------
Accumulated postretirement benefit obligation
  included in other long-term liabilities              $4,658                $ 2,282
                                                       ======                =======
</TABLE>
 
     The weighted-average discount rate used in determining the accumulated
postretirement benefit obligation was 7.5% for December 31, 1997 and 1996. The
average inflation rates of medical costs over the life of the benefits were
assumed to be 9% in 1998, decreasing 1% per year to 5.5% in 2002 and thereafter.
An increase of 1% in the assumed medical costs trend rates would result in an
increase in the accumulated postretirement benefit obligation of $282 at
December 31, 1997 and an increase in 1997 net periodic postretirement benefit
cost of $9 and $12 for the period August 1 to December 31, 1997 and the period
January 1 to July 31, 1997, respectively.
 
     As a result of the 1996 restructuring plan and the related early retirement
program, Aqua-Chem incurred a curtailment charge of $387, which is included in
the restructuring charges in the year ended December 31, 1996 consolidated
statement of operations.
 
                                      F-22
<PAGE>   138
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
NOTE 15: SEGMENT INFORMATION
 
     Industry Segments
 
<TABLE>
<CAPTION>
                                                   POST-
                                                ACQUISITION
                                                  BASIS OF
                                                 ACCOUNTING           PRE-ACQUISITION BASIS OF ACCOUNTING
                                                ------------      -------------------------------------------
                                                AUGUST 1 TO                          YEARS ENDED DECEMBER 31,
                                                DECEMBER 31,      JANUARY 1 TO       ------------------------
                  SEGMENT                           1997          JULY 31, 1997        1996           1995
- --------------------------------------------    ------------      -------------      ---------      ---------
<S>                                             <C>               <C>                <C>            <C>
Net sales:
  Cleaver-Brooks                                  $ 73,974          $ 80,868         $155,527       $144,711
  Water Technologies                                17,567            18,750           44,025         38,657
                                                  --------          --------         --------       --------
     Total                                        $ 91,541          $ 99,618         $199,552       $183,368
                                                  ========          ========         ========       ========
Operating income (loss):
  Cleaver-Brooks                                  $  7,588          $  4,086         $  8,146       $ (3,988)
  Water Technologies                                 1,428                28              750         (2,656)
  All others                                          (944)             (410)          (2,274)        (1,003)
                                                  --------          --------         --------       --------
     Total                                        $  8,072          $  3,704         $  6,622       $ (7,647)
                                                  ========          ========         ========       ========
Identifiable assets:
  Cleaver-Brooks                                  $ 33,707          $ 48,976         $ 65,577       $ 65,247
  Water Technologies                                13,077            22,734           20,708         19,283
  All others                                        77,877            32,429           14,715         16,851
                                                  --------          --------         --------       --------
     Total                                        $124,661          $104,139         $101,000       $101,381
                                                  ========          ========         ========       ========
Capital expenditures:
  Cleaver-Brooks                                  $    337          $    567         $  2,339       $  4,575
  Water Technologies                                   188             1,240              265            187
  All others                                           672               388              185            105
                                                  --------          --------         --------       --------
     Total                                        $  1,197          $  2,195         $  2,789       $  4,867
                                                  ========          ========         ========       ========
Depreciation:
  Cleaver-Brooks                                  $    686          $  1,160         $  2,083       $  2,097
  Water Technologies                                   198               285              462            495
  All others                                           100               177              320            374
                                                  --------          --------         --------       --------
     Total                                        $    984          $  1,622         $  2,865       $  2,966
                                                  ========          ========         ========       ========
</TABLE>
 
     Aqua-Chem does not have any customers who represent 10% of consolidated
sales.
 
     Geographic Segments
 
     Aqua-Chem operates primarily in the United States, with manufacturing
facilities also located in Canada and Mexico. Canadian and Mexican operations
individually represent less than 10% of Aqua-Chem's consolidated net sales and
total assets.
 
     Aqua-Chem's export sales, defined as sales of existing divisions' products
made in the U.S. and sold by Aqua-Chem to foreign customers were approximately
19% of net sales for the period August 1, 1997 through December 31, 1997 and 22%
for the period January 1, 1997 through July 31, 1997. Aqua-Chem's export sales
 
                                      F-23
<PAGE>   139
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
for the years ended December 31, 1996 and 1995 were approximately 24% of net
sales. Aqua-Chem's export sales are included in the respective segments' sales
presented above.
 
NOTE 16: COMMITMENTS AND CONTINGENCIES
 
     Aqua-Chem and its subsidiaries are involved in legal proceedings, claims
and litigation arising in the ordinary course of business. These claims arise
from a variety of factors, including suits alleging personal injury related to
the use and exposure to certain of Aqua-Chem's products (see the "Risk
Factors -- Product Liability Litigation" and "Business of Aqua-Chem -- Legal
Proceedings" sections of this Offering Circular for further information). The
Company has successfully resolved most closed claims and cases without payment
and is vigorously defending open claims, and believes that it has strong
defenses to all claims brought to date. Although Aqua-Chem believes the costs
and liabilities associated with these matters will not have a material adverse
effect on their results of operations or financial condition, there can be no
assurances to this effect.
 
     In the ordinary course of business, Aqua-Chem is contingently liable for
performance under letters of credit totaling approximately $3,900 at December
31, 1997 and 1996, respectively. Additionally, at December 31, 1996, Aqua-Chem
had letters of credit outstanding of $5,000 which collateralized the IRB's.
Management does not expect any material losses to result from these off-balance
sheet instruments, and, therefore, is of the opinion that the fair value of
these instruments is zero.
 
NOTE 17: EARNINGS PER SHARE
 
     In 1997, Aqua-Chem adopted SFAS No. 128, "Earnings per Share" for all
periods presented. The new standard simplified the computation of earnings per
share (EPS) and provides improved comparability with international standards.
SFAS No. 128 replaces primary EPS with "Basic" EPS, which excludes dilution and
is computed by dividing net earnings or (loss) by the weighted-average number of
common shares outstanding for the period. "Diluted" EPS is computed similarly to
primary EPS by reflecting the potential dilution that occurs if securities or
other contracts to issue common stock were exercised or converted to common
stock or resulted in the issuance of common stock that then shared in the
earnings. The following reconciles the numerators and denominators of the basic
and diluted earnings per share computations.
 
<TABLE>
<CAPTION>
                                                                POST-ACQUISITION
                                                                    BASIS OF
                                                                   ACCOUNTING
                                                                ----------------
                                                                  AUGUST 1 TO
                                                                  DECEMBER 31,
                                                                      1997
                                                                ----------------
<S>                                                             <C>
Basic Earnings Per Share:
  Net Income                                                       $   3,309
  Less: Preferred Stock Dividends                                        260
                                                                   ---------
  Net Income                                                       $   3,049
                                                                   =========
Weighted Average Number of Shares                                  1,000,000
                                                                   =========
Basic Earnings Per Share                                           $    3.05
                                                                   =========
</TABLE>
 
                                      F-24
<PAGE>   140
                                AQUA-CHEM, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                POST-ACQUISITION
                                                                    BASIS OF
                                                                   ACCOUNTING
                                                                ----------------
                                                                  AUGUST 1 TO
                                                                  DECEMBER 31,
                                                                      1997
                                                                ----------------
<S>                                                             <C>
Diluted Earnings Per Share:
  Net Income applicable to common                                  $   3,049
                                                                   =========
Weighted Average Number of Shares-Basic                            1,000,000
Effect of Dilutive Securities:
  Warrants                                                           176,471
                                                                   ---------
Weighted Average Number of Shares-Diluted                          1,176,471
                                                                   =========
Diluted Earnings Per Share                                         $    2.59
                                                                   =========
</TABLE>
 
NOTE 18: SUBSEQUENT EVENTS
 
     Subsequent to December 31, 1997, Aqua-Chem entered into two separate
product performance settlements relating to products sold in 1993. Aqua-Chem
paid $2,150 subsequent to year end and agreed to pay an additional $1,050 in
1998 and $900 in 1999. These amounts have been recorded at December 31, 1997 as
accrued litigation settlements for amounts paid or payable in 1998 and within
other long-term liabilities for amounts due in 1999.
 
     On May 28, 1998, Aqua-Chem entered into a definitive agreement to purchase
substantially all of the assets of National Dynamics Corporation ("NDC"),
located principally in Nebraska, for approximately $47,000 in cash plus the
assumption of certain liabilities. The transaction is subject to the completion
of due diligence.
 
     Aqua-Chem has reached a tentative decision to close its Greenville,
Mississippi facility and has taken steps to initiate discussions concerning this
decision with the Union representing its production workers. Under the proposed
plan, work currently performed at the Greenville facility will be transferred to
other Aqua-Chem facilities and/or outsourced. Aqua-Chem estimates that closing
the Greenville facility will cost approximately $5,500, to be expended in 1998
and 1999.
 
                                      F-25
<PAGE>   141
 
                                AQUA-CHEM, INC.
                     CONSOLIDATED CONDENSED BALANCE SHEETS
                                  (UNAUDITED)
                (DOLLARS IN THOUSANDS; EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                              SEPTEMBER 30,   DECEMBER 31,
                                                                  1998            1997
                                                              -------------   ------------
<S>                                                           <C>             <C>
ASSETS
Current assets:
  Cash and cash equivalents                                     $  6,114        $ 11,936
  Accounts receivable, less allowances of $2,370 at
     September 30, 1998
     and $638 at December 31, 1997                                47,609          33,332
  Revenues in excess of billings                                   4,691           5,068
  Inventories                                                     27,406          20,814
  Deferred income taxes                                            3,672           4,237
  Prepaid expenses and other current assets                        6,592           1,093
                                                                --------        --------
          Total current assets                                    96,084          76,480
Property, plant and equipment -- net                              37,778          31,555
Intangible assets, less accumulated amortization of $653 at
  September 30, 1998 and $273 at December 31, 1997                38,859          10,174
Deferred income taxes                                              1,640           2,086
Other assets                                                       7,162           4,366
                                                                --------        --------
  TOTAL ASSETS                                                  $181,523        $124,661
                                                                ========        ========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Current maturities on long-term debt                          $     --        $  1,055
  Accounts payable
     Trade                                                        10,652          10,685
     Other                                                         3,263           5,324
  Billings in excess of revenues                                   5,361           5,654
  Compensation and profit sharing                                  3,214           5,318
  Accrued litigation settlements                                   1,425           3,200
  Accrued expenses                                                25,042          17,624
                                                                --------        --------
          Total current liabilities                               48,957          48,860
Long-term debt                                                   125,000          58,636
Other long-term liabilities                                        5,088           6,006
                                                                --------        --------
  Total other liabilities                                        130,088          64,642
Minority interest                                                    597             589
Preferred stock with mandatory redemption provisions               4,795           7,365
Stockholders' equity:
  Common stock, $.01 par value. Authorized 2,000,000 shares;
     issued and outstanding 1,000,000 shares at September
     30, 1998 and December 31, 1997                                   10              10
  Additional paid-in capital                                          90              90
  Retained earnings                                               (2,778)          3,049
  Accumulated other comprehensive income                            (236)             56
                                                                --------        --------
          Total stockholders' equity (deficit)                    (2,914)          3,205
                                                                --------        --------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                      $181,523        $124,661
                                                                ========        ========
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                      F-26
<PAGE>   142
 
                                AQUA-CHEM, INC.
                CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
                                  (UNAUDITED)
                 (DOLLARS IN THOUSANDS; EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                         POST-ACQUISITION                 PRE-ACQUISITION
                                                        BASIS OF ACCOUNTING             BASIS OF ACCOUNTING
                                              ---------------------------------------   -------------------
                                                 NINE MONTHS           TWO MONTHS          SEVEN MONTHS
                                                    ENDED                ENDED                 ENDED
                                              SEPTEMBER 30, 1998   SEPTEMBER 30, 1997      JULY 31, 1997
                                              ------------------   ------------------      -------------
<S>                                           <C>                  <C>                  <C>
Net sales                                          $142,734             $35,875               $99,618
Cost of goods sold                                  107,820              26,129                73,656
                                                   --------             -------               -------
  Gross margin                                       34,914               9,746                25,962
Costs and expenses:
  Selling, general and administrative                29,178               6,993                23,323
  Restructuring charges                               4,720                  --                    --
                                                   --------             -------               -------
                                                     33,898               6,993                23,323
                                                   --------             -------               -------
Operating income (loss)                               1,016               2,753                 2,639
Other income (expense):
  Interest income                                       321                  63                   450
  Interest expense                                   (6,662)             (1,003)                 (753)
  Other, net                                             65                  34                   110
                                                   --------             -------               -------
                                                     (6,276)               (906)                 (193)
Income (loss) before income taxes, minority
  interest and extraordinary item                    (5,260)              1,847                 2,446
Income tax expense (benefit)                         (1,637)                739                   421
Minority interest in earnings of
  consolidated subsidiary                               232                  66                   171
                                                   --------             -------               -------
Net income (loss) before extraordinary item          (3,855)              1,042                 1,854
Extraordinary item, net of tax benefit of
  $840                                                1,260                  --                    --
                                                   --------             -------               -------
Net income (loss)                                  $ (5,115)            $ 1,042                 1,854
Preferred stock dividends                              (413)                (89)                   --
                                                   --------             -------               -------
Net income (loss) applicable to common             $ (5,528)            $   953               $ 1,854
                                                   ========             =======               =======
Other comprehensive income (loss)
  Foreign currency translation adjustment              (292)                472                  (404)
                                                   --------             -------               -------
  Comprehensive income (loss)                      $ (5,407)            $ 1,514               $ 1,611
PER SHARE DATA:
Basic net income (loss) per share of common
  stock                                            $  (5.53)            $   .95                  N.A.
Diluted net income (loss) per share of
  common stock                                     $  (5.53)            $   .81                  N.A.
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                      F-27
<PAGE>   143
 
                                AQUA-CHEM, INC.
                CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                                  (UNAUDITED)
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                 POST-ACQUISITION            PRE-ACQUISITION
                                                                BASIS OF ACCOUNTING        BASIS OF ACCOUNTING
                                                           -----------------------------   -------------------
                                                            NINE MONTHS     TWO MONTHS        SEVEN MONTHS
                                                               ENDED           ENDED              ENDED
                                                           SEPTEMBER 30,   SEPTEMBER 30,        JULY 31,
                                                               1998            1997               1997
                                                           -------------   -------------      ------------
<S>                                                        <C>             <C>             <C>
Cash flows from operating activities:
  Net income (loss)                                          $ (5,115)       $  1,044              1,854
  Adjustments to reconcile net income (loss) to net cash
    provided by (used in) operating activities:
    Depreciation and amortization                               3,399             804              1,690
    Deferred tax expense                                        1,239              --                 --
    Minority interest in earnings of consolidated
      subsidiary                                                  232              97                171
    Extraordinary item, net of tax benefit                      1,260              --                 --
    Restructuring charges                                       4,720              --                 --
    Increase (decrease) in cash due to changes in:
      Accounts receivable                                      (1,907)         (6,219)             5,166
      Revenues in excess of billings                              377           2,666             (2,881)
      Inventories                                               3,649           2,106             (1,948)
      Prepaid expenses and other current assets                (1,282)            (66)              (623)
      Accounts payable -- trade                                (3,816)         (2,614)             1,969
      Accounts payable -- other                                (2,662)            228             (1,743)
      Billings in excess of revenues                           (4,711)            157              2,250
      Accrued expenses and other current liabilities           (6,229)          3,900               (999)
      Other, net                                               (1,987)         (1,688)               (49)
                                                             --------        --------            -------
    Total adjustments                                          (7,718)           (629)             3,003
                                                             --------        --------            -------
Net cash provided by (used in) operating activities           (12,833)            415              4,857
Cash flows from investing activities:
  Management Buy-Out of Aqua-Chem, Inc.                            --         (52,102)                --
  Purchase of National Dynamics Corporation                   (47,900)             --                 --
  Proceeds from sales of property, plant and equipment
    and other assets                                               55              --                 73
  Additions to property, plant and equipment                   (1,772)           (641)            (2,195)
  Additions to intangibles                                         --              --               (270)
  Proceeds from notes receivable                                   --              51              1,511
                                                             --------        --------            -------
Net cash used in investing activities                         (49,617)        (52,692)              (881)
Cash flows from financing activities:
  Issuance of Notes                                           125,000              --                 --
  Proceeds from revolving credit agreement                      3,000              --                 --
  Proceeds from debt                                               --          65,573                118
  Principal payments on debt                                  (63,063)        (25,020)              (112)
  Issuance of common stock                                         --             100                 --
  Issuance of warrants                                             --             433                 --
  Redemption of preferred stock and payment of dividends       (3,282)             --                 --
  Issuance of preferred stock                                      --           2,655                 --
  Deferred financing costs                                     (5,027)         (2,030)                --
                                                             --------        --------            -------
  Net cash provided by financing activities                    56,628          41,711                  6
Net increase (decrease) in cash and cash equivalents           (5,822)        (10,566)             3,982
Cash and cash equivalents at beginning of period               11,936          12,609              8,627
                                                             --------        --------            -------
Cash and cash equivalents at end of period                   $  6,114        $  2,043            $12,609
                                                             ========        ========            =======
Cash paid during the period for:
  Interest                                                   $  2,909        $    548            $   658
  Taxes                                                      $  2,039        $     55            $    11
Details of Acquisition of National Dynamics Corporation
  in 1998 and Management Buy-Out in 1997:
  Fair value of assets acquired                              $ 34,659        $116,058
  Goodwill                                                     27,932           9,689
  Liabilities assumed                                         (14,691)        (69,196)
                                                             --------        --------
  Issuance of Series A Cumulative Preferred Stock                              (4,449)
                                                                             --------
  Cash paid for assets                                       $ 47,900        $ 52,102
                                                             ========        ========
</TABLE>
 
The accompanying notes to consolidated financial statements are an integral part
                              of these statements.
 
                                      F-28
<PAGE>   144
 
                                AQUA-CHEM, INC.
              NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
 
 (1) In the opinion of Management, the accompanying unaudited financial
     statements of Aqua-Chem, Inc. contain all adjustments which are of a normal
     recurring nature necessary to present fairly the financial position as of
     September 30, 1998, and the results of operations and cash flows for the
     periods indicated. Interim financial results are not necessarily indicative
     of operating results for an entire year.
 
 (2) Certain notes and other information have been condensed or omitted from
     these interim consolidated condensed financial statements. Therefore, these
     statements should be read in conjunction with the Aqua-Chem, Inc.
     Consolidated Financial Statements as of December 31, 1997 and 1996.
 
 (3) On July 31, 1997, Aqua-Chem, Inc. ("OLDCO") entered into a definitive
     merger agreement with A-C Acquisition Corp. ("A-C Acquisition"), a 100%
     owned subsidiary of Rush Creek LLC ("Rush Creek"). Rush Creek is a Limited
     Liability Company owned by certain management of OLDCO and Whitney Equity
     Partners L.P. Also on July 31, 1997, A-C Acquisition acquired the assets of
     OLDCO (the "Management Buy-Out") for $125,747, which includes $69,196 of
     liabilities assumed and $5,000 of Series A Cumulative Preferred Stock
     issued to the sellers. The amount paid does not include contingent
     consideration to be paid to the sellers based on cumulative earnings of
     certain operations of Aqua-Chem subsequent to the Management Buy-Out. The
     Management Buy-Out was accounted for by Aqua-Chem using the purchase method
     of accounting.
 
 (4) The consolidated condensed financial statements for the seven months ended
     July 31, 1997 were prepared using OLDCO's historical basis of accounting
     (the "pre-acquisition basis of accounting"). The consolidated condensed
     financial statements for the two months ended September 30, 1997 and for
     the nine months ended September 30, 1998 were prepared under a new basis of
     accounting that reflects the fair values of assets acquired and liabilities
     assumed, the related financing costs and all debt incurred in connection
     with the Management Buy-Out (the "post-acquisition basis of accounting").
     Accordingly, the accompanying financial statements are not comparable in
     all material respects since those financial statements report financial
     position, results of operations, and cash flows of two separate entities.
 
 (5) Inventories consist of the following:
 
<TABLE>
<CAPTION>
                                                            SEPTEMBER 30,   DECEMBER 31,
                                                                1998            1997
                                                            -------------   ------------
<S>                                                         <C>             <C>
Raw materials and work-in-process                              $21,934        $16,963
Finished goods                                                   5,472          3,851
                                                               -------        -------
  Total inventories                                            $27,406        $20,814
                                                               =======        =======
</TABLE>
 
 (6) On June 23, 1998 Aqua-Chem issued $125,000 in unsecured senior subordinated
     notes. The notes carry an interest rate of 11 1/4% and are due July 1,
     2008. Interest is payable semi-annually beginning January 1, 1999. Proceeds
     from the notes were used to repay Aqua-Chem's existing debt, to redeem
     $3,269 of Aqua-Chem's Series A Preferred Stock, to acquire substantially
     all of the assets of National Dynamics Corporation ("NDC") (see note (9)),
     to pay the accrued interest and dividends, fees and expenses associated
     with the foregoing, and for general corporate purposes. The holders of the
     Series B Preferred elected not to require that the Series B Preferred be
     redeemed in connection with the above described senior subordinated notes.
 
     In conjunction with the issuance of the notes and the acquisition of NDC,
     Aqua-Chem entered into a revised $45,000 secured revolving credit facility.
     Borrowings under this facility are made in the form of revolving credit
     notes. These notes bear interest at a rate of either eurocurrency plus a
     factor as defined in the agreement, prime, or federal funds rate plus 100
     basis points. The revolving credit agreement will terminate June 23, 2003.
     The facility is secured by substantially all of the assets of the Company.
     At September 30, 1998 there were no borrowings outstanding. Among other
     restrictions, the credit agreement contains covenants relating to financial
     ratios and other limitations, as defined by the agreement. As of September
     30, 1998, the Company was in compliance with these covenants.
 
 (7) On June 25, 1998 the Board of Directors approved a plan of closure for the
     Greenville, Mississippi facility and the agreement reached with the Union
     representing the facility's production workers. As a
 
                                      F-29
<PAGE>   145
 
     result, the Company recorded a restructuring charge of $4,720 to operations
     in the six months ended June 30, 1998. Work currently performed at the
     facility is in the process of being transferred to other Company facilities
     and/or outsourced. The plan will result in the elimination of 149 positions
     and closure of the facility within approximately one year from the date of
     approval. The Greenville facility has fixed assets with a net book value of
     $3,800, which includes $1,828 of machinery and equipment, $1,846 in lease
     and leasehold improvements and $126 in furniture and fixtures. The Company
     intends to transfer some of the fixed assets to other facilities and will
     sell or dispose of the remaining assets by the closure date. The write down
     associated with the assets to be sold or disposed of results in a
     restructuring charge of $2,921. The remaining change includes $100 to write
     down the value of inventory, $1,460 of employee termination benefits and
     $239 of other costs related to post closure upkeep and maintenance of the
     facility.
 
 (8) On June 23, 1998, Aqua-Chem acquired substantially all the assets of
     National Dynamics Corporation for $62,591, which includes $14,691 of
     liabilities assumed. The acquisition was accounted for using the purchase
     method of accounting. The total purchase cost was allocated first to
     identified tangible and intangible assets and liabilities based upon their
     respective fair values, with the remainder of $27,932 being allocated to
     goodwill, which will be amortized on a straight-line basis over 40 years.
     The financial statements reflect the preliminary estimates of allocating
     purchase price and may be revised at a later date. The Company does not
     expect the final purchase price allocation to be materially different from
     preliminary estimates.
 
 (9) The following information presents pro forma condensed consolidated
     statements of operations assuming OLDCO and National Dynamics Corporation
     had been acquired by Aqua-Chem as of January 1, 1997. Such information
     includes adjustments to reflect additional interest expense and
     depreciation expense, amortization of goodwill and other intangibles, a
     reduction of other expenses to Management Buy-Out-related payments being
     made by OLDCO and the net elimination of employment costs of the former
     owners of National Dynamics Corporation.
 
<TABLE>
<CAPTION>
                                                         NINE MONTHS           NINE MONTHS
                                                            ENDED                 ENDED
                                                      SEPTEMBER 30, 1998    SEPTEMBER 30, 1997
                                                      ------------------    ------------------
<S>                                                   <C>                   <C>
Net sales                                                  $164,199              $182,493
Net income (loss) applicable to common shares                (5,717)                2,129
Earnings (loss) per common share (basic)                   $  (5.72)             $   2.13
Earnings (loss) per common share (diluted)                 $  (5.72)             $   1.81
</TABLE>
 
(10) Effective December 31, 1997, Aqua-Chem adopted Statement of Financial
     Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS No.
     130"). This statement establishes standards for reporting and display of
     comprehensive income which includes foreign currency translation
     adjustments accounted for under SFAS No. 52. SFAS No. 130 requires that an
     enterprise classify items of other comprehensive income by their nature in
     a financial statement for the period in which they are recognized.
     Aqua-Chem has chosen to disclose comprehensive income in the Consolidated
     Statements of Operations. Prior years have been restated to conform to the
     SFAS No. 130 requirements. Accumulated other comprehensive income at
     September 30, 1998 and December 31, 1997 is comprised of only foreign
     currency translation adjustments. Prior years have been restated to conform
     to the SFAS No. 130 requirements.
 
     Statement of Position ("SOP") No. 98-1, "Accounting for the Costs of
     Computer Software Developed or Obtained for Internal Use" was issued by The
     American Institute of Certified Public Accountants in March of 1998 and is
     effective for fiscal years beginning after December 15, 1998. Aqua-Chem's
     accounting for costs of computer software developed or obtained for
     internal use is consistent with the guidelines established in the SOP and,
     as a result, Aqua-Chem does not anticipate that the adoption of this
     statement will have a material impact on Aqua-Chem's financial position or
     results of operations.
 
     In June 1998, the Financial Accounting Standards Board issued Statement of
     Financial Accounting Standards No. 133, Accounting for Derivative
     Instruments and Hedging Activities. The statement establishes accounting
     and reporting standards requiring that every derivative instrument
     (including
 
                                      F-30
<PAGE>   146
 
     certain derivative instruments embedded in other contracts) be recorded in
     the balance sheet as an asset or liability measured at its fair value.
     Statement 133 is effective for fiscal years beginning after June 15, 1999.
     The Company has not determined the timing of or method of adoption, but
     does not anticipate that the adoption of this standard will have a material
     impact on its financial statements.
 
(11) In connection with the Management Buy-Out, Aqua-Chem adopted the Aqua-Chem
     1997 Stock Option Plan (the "1997 Plan"), which provides for the granting
     to key employees, directors, and other individuals of options to purchase
     an aggregate of 61,919 shares of Aqua-Chem common stock at a purchase price
     not less than the greater of (i) $3.75, or (ii) fair market value as
     determined by the Plan. Options vest primarily based upon Aqua-Chem
     achieving certain operating results or within 7 years from the date of
     grant. As of September 30, 1998, 4,000 options have been granted and are
     outstanding under the 1997 Plan.
 
     On August 1, 1998, Aqua-Chem adopted the Aqua-Chem, Inc. 1998 Stock Option
     Plan (the "1998 Plan"), which provides for the granting to key advisers,
     consultants and employees options to purchase an aggregate of 61,919 shares
     of Aqua-Chem common stock at a purchase price of not less than $3.75 nor
     greater than the market price as determined by the Board of Directors.
     Options vest primarily in accordance with vesting provisions contained in
     written agreement with the optionee. As of September 30, 1998, 15,740.40
     options have been granted and are outstanding under the 1998 Plan.
 
     Under separate agreements from the 1997 Plan and the 1998 Plan, the option
     to purchase 1,725 shares of common stock have been granted to two directors
     of Aqua-Chem. Under the terms of the agreements, the option to purchase 600
     shares vests one year from the effective date of the grant, with the
     remaining 1,125 options vesting at a rate of 225 per year commencing on
     December 31, 1998 and continuing through December 31, 2002. These options
     allow the holder to purchase common stock of Aqua-Chem at $3.75 per share,
     which does not differ significantly from fair market value. As of September
     30, 1998, no options were exercised.
 
                                      F-31
<PAGE>   147
 
                                AQUA-CHEM, INC.
 
                SCHEDULE II -- VALUATION AND QUALIFYING ACCOUNTS
 
<TABLE>
<CAPTION>
                                                                   ADDITIONS
                                                               ------------------
                                                    BALANCE    CHARGED    CHARGED
                                                      AT       TO COSTS     TO                    BALANCE
                                                   BEGINNING     AND       OTHER                  AT END
                                                   OF PERIOD   EXPENSES   ACCOUNT   DEDUCTIONS   OF PERIOD
                                                   ---------   --------   -------   ----------   ---------
<S>                                                <C>         <C>        <C>       <C>          <C>
Allowance for doubtful accounts receivable:
  January 1 to September 30, 1998................    $638        $190     $1,750(a)    $208       $2,370
                                                     ====        ====     ======       ====       ======
  August 1 to December 31, 1997..................    $684        $ 28     $   --       $ 74       $  638
                                                     ====        ====     ======       ====       ======
  January 1 to July 31, 1997.....................    $659        $136     $   --       $111       $  684
                                                     ====        ====     ======       ====       ======
  Year ended December 31, 1996...................    $596        $205     $   --       $142       $  659
                                                     ====        ====     ======       ====       ======
  Year ended December 31, 1995...................    $746        $ 97     $   --       $247       $  596
                                                     ====        ====     ======       ====       ======
</TABLE>
 
- ------------------------------------
(a) Reflects the balance acquired as a result of the acquisition of National
    Dynamics Corporation.
 
                                      F-32
<PAGE>   148
 
                                AQUA-CHEM, INC.
 
               COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                             (DOLLARS IN THOUSANDS)
<TABLE>
<CAPTION>
                                               POST-ACQUISITION
                                              BASIS OF ACCOUNTING
                          -----------------------------------------------------------
 
                             JANUARY 1 TO         AUGUST 1 TO         AUGUST 1 TO
                          SEPTEMBER 30, 1998   DECEMBER 31, 1997   SEPTEMBER 30, 1997
                          ------------------   -----------------   ------------------
<S>                       <C>                  <C>                 <C>
Net income (loss).......       $(5,115)             $3,309               $1,042
Add:
  Interest..............         6,274               2,414                  945
  Amortization of
    capitalized debt
    expense.............           388                 145                   58
  Income tax expense
    (benefit)...........        (1,637)              2,289                  739
  Extraordinary item
    (net of tax)........         1,260                  --                   --
                               -------              ------               ------
        Earnings (loss)
          as defined....       $ 1,170              $8,157               $2,784
                               =======              ======               ======
Interest................         6,274               2,414                  945
Amortization of
  capitalized debt
  expense...............           388                 145                   58
                               -------              ------               ------
        Fixed charges as
          defined.......       $ 6,662              $2,559               $1,003
Ratio of earnings to
  fixed charges.........            --(a)              3.2x                 2.8x
                               =======              ======               ======
 
<CAPTION>
                                            PRE-ACQUISITION
                                          BASIS OF ACCOUNTING
                          ---------------------------------------------------
                                               YEARS ENDED DECEMBER 31,
                          JANUARY 1 TO    -----------------------------------
                          JULY 31, 1997    1996     1995      1994      1993
                          -------------   ------   -------   -------   ------
<S>                       <C>             <C>      <C>       <C>       <C>
Net income (loss).......     $1,854       $4,094   $(6,454)  $(4,678)  $2,752
Add:
  Interest..............        753        1,448     1,663     1,200    1,075
  Amortization of
    capitalized debt
    expense.............         --           --        --        --       --
  Income tax expense
    (benefit)...........        421          507       189    (2,806)   2,191
  Extraordinary item
    (net of tax)........         --           --        --        --       --
                             ------       ------   -------   -------   ------
        Earnings (loss)
          as defined....     $3,028       $6,049   $(4,602)  $(6,284)  $6,018
                             ======       ======   =======   =======   ======
Interest................        753        1,448     1,663     1,200    1,075
Amortization of
  capitalized debt
  expense...............         --           --        --        --       --
                             ------       ------   -------   -------   ------
        Fixed charges as
          defined.......     $  753       $1,448   $ 1,663   $ 1,200   $1,075
Ratio of earnings to
  fixed charges.........        4.0x         4.2x       --(b)      --(c)    5.6x
                             ======       ======   =======   =======   ======
</TABLE>
 
- ---------------
(a) Earnings were inadequate to cover fixed charges by $5,492 for the nine
    months ended September 30, 1998.
 
(b) Earnings were inadequate to cover fixed charges by $6,265 for the year ended
    December 31, 1995.
 
(c) Earnings were inadequate to cover fixed charges by $7,484 for the year ended
    December 31, 1994.
 
                                      F-33
<PAGE>   149
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors
National Dynamics Corporation:
 
     We have audited the accompanying balance sheets of National Dynamics
Corporation as of October 31, 1997 and 1996 and the related statements of
earnings and retained earnings and cash flows for each of the years in the
three-year period ended October 31, 1997. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these financial statements based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of National Dynamics
Corporation as of October 31, 1997 and 1996 and the results of its operations
and its cash flows for each of the years in the three-year period ended October
31, 1997, in conformity with generally accepted accounting principles.
 
                                            KPMG PEAT MARWICK LLP
 
Omaha, Nebraska
December 23, 1997
 
                                      F-34
<PAGE>   150
 
                         NATIONAL DYNAMICS CORPORATION
                                 BALANCE SHEETS
                           OCTOBER 31, 1997 AND 1996
 
<TABLE>
<CAPTION>
                                                                   1997           1996
                                                                -----------    ----------
<S>                                                             <C>            <C>
ASSETS
- ------------------------------------------------------------
Current assets:
  Cash                                                          $    66,883       222,415
  Trade accounts receivable (including retainage of
     $1,822,957 and $1,003,154 in 1997 and 1996,
     respectively, net of allowance for doubtful accounts of
     $750,000 and $1,534,000 in 1997 and 1996, respectively)     13,398,380    11,279,456
  Inventories                                                     2,589,595     1,807,447
  Costs in excess of billings on uncompleted contracts            2,711,606     2,661,098
  Prepaid expenses                                                  134,807       181,937
                                                                -----------    ----------
Total current assets                                             18,901,271    16,152,353
                                                                -----------    ----------
Property, plant and equipment, at cost                           11,251,137     9,835,805
Less accumulated depreciation                                     4,871,991     4,377,549
                                                                -----------    ----------
Net property, plant and equipment                                 6,379,146     5,458,256
                                                                -----------    ----------
Other assets                                                        710,920       533,505
                                                                -----------    ----------
                                                                $25,991,337    22,144,114
                                                                ===========    ==========
LIABILITIES AND STOCKHOLDERS' EQUITY
- ------------------------------------------------------------
Current liabilities:
  Note payable to bank                                          $ 1,422,000     1,472,000
  Accounts payable                                                4,247,628     4,017,391
  Accrued expenses                                                3,545,127     3,744,727
  Billings in excess of cost on uncompleted contracts             2,139,508     1,671,087
  Stockholders' dividends payable                                   500,000       500,000
                                                                -----------    ----------
Total current liabilities                                        11,854,263    11,405,205
Deferred compensation                                               140,000       130,000
                                                                -----------    ----------
Total liabilities                                                11,994,263    11,535,205
                                                                -----------    ----------
Stockholders' equity:
  Common stock of $1 par value per share.
  Authorized 20,000 shares; issued and outstanding 8,000
     shares                                                           8,000         8,000
  Additional paid-in capital                                         81,186        81,186
  Retained earnings                                              13,907,888    10,519,723
                                                                -----------    ----------
Total stockholders' equity                                       13,997,074    10,608,909
                                                                -----------    ----------
Commitments and contingencies
                                                                $25,991,337    22,144,114
                                                                ===========    ==========
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-35
<PAGE>   151
 
                         NATIONAL DYNAMICS CORPORATION
                  STATEMENTS OF EARNINGS AND RETAINED EARNINGS
                  YEARS ENDED OCTOBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                             1997          1996         1995
                                                          -----------   ----------   ----------
<S>                                                       <C>           <C>          <C>
Net sales                                                 $58,105,823   54,844,788   48,457,316
Cost of sales                                              45,065,922   43,645,588   39,740,679
                                                          -----------   ----------   ----------
Gross profit                                               13,039,901   11,199,200    8,716,637
Selling, general and administrative expenses                5,814,695    5,515,591    6,600,609
                                                          -----------   ----------   ----------
Operating income                                            7,225,206    5,683,609    2,116,028
Other income                                                  298,186      153,884      170,924
Other deductions, including interest expense of
  $182,770, $42,765 and $135,442 in 1997, 1996 and 1995,
  respectively                                               (185,227)    (133,494)    (254,029)
                                                          -----------   ----------   ----------
Net earnings                                                7,338,165    5,703,999    2,032,923
Retained earnings at beginning of year                     10,519,723    8,160,885    8,020,962
Dividends declared ($493.75, $418.15 and $236.63 per
  share in 1997, 1996 and 1995, respectively)              (3,950,000)  (3,345,161)  (1,893,000)
                                                          -----------   ----------   ----------
Retained earnings at end of year                          $13,907,888   10,519,723    8,160,885
                                                          ===========   ==========   ==========
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-36
<PAGE>   152
 
                         NATIONAL DYNAMICS CORPORATION
                            STATEMENTS OF CASH FLOWS
                  YEARS ENDED OCTOBER 31, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                           1997          1996          1995
                                                        -----------   -----------   -----------
<S>                                                     <C>           <C>           <C>
Cash flows from operating activities:
  Net earnings                                          $ 7,338,165     5,703,999     2,032,923
  Adjustments to reconcile net earnings to net cash
     provided by operating activities:
       Depreciation                                         496,938       462,719       449,909
       Loss on sale and disposal of assets                      843         2,581            --
       Change in assets and liabilities:
          Accounts receivable                            (2,118,924)    1,005,589    (4,077,443)
          Inventories                                      (782,148)     (210,511)     (146,864)
          Costs in excess of billings on uncompleted
            contracts                                       (50,508)      (37,063)      127,112
          Prepaid expenses                                   47,130       (84,946)      (31,297)
          Other assets                                     (177,415)       (8,341)     (117,749)
          Accounts payable                                  230,237      (125,914)    1,209,740
          Accrued expenses                                 (199,600)   (1,011,590)    1,371,415
          Billings in excess of costs on uncompleted
            contracts                                       468,421      (279,186)     (773,711)
          Deferred compensation                              10,000        10,000        10,000
                                                        -----------   -----------   -----------
Net cash provided by operating activities                 5,263,139     5,427,337        54,035
                                                        -----------   -----------   -----------
Cash flows from investing activities:
  Capital expenditures                                   (1,419,271)     (570,767)   (1,758,158)
  Proceeds from sale of property, plant and equipment           600            --            --
  Net payments on note receivable                                --            --       582,611
                                                        -----------   -----------   -----------
Net cash used by investing activities                    (1,418,671)     (570,767)   (1,175,547)
                                                        -----------   -----------   -----------
Cash flows from financing activities:
  Dividends paid                                         (3,950,000)   (2,845,161)   (1,893,000)
  Net (payments) advances on note payable to bank           (50,000)     (662,000)    2,028,000
  Proceeds on issuance of long-term debt                         --       200,000     1,300,000
Principal payments on long-term debt                             --    (1,432,136)     (351,500)
                                                        -----------   -----------   -----------
Net cash provided by (used in) financing activities      (4,000,000)   (4,739,297)    1,083,500
                                                        -----------   -----------   -----------
Net increase (decrease) in cash                            (155,532)      117,273       (38,012)
Cash at beginning of year                                   222,415       105,142       143,154
                                                        -----------   -----------   -----------
Cash at end of year                                     $    66,883       222,415       105,142
                                                        ===========   ===========   ===========
Supplemental cash flow information:
  Cash paid for interest                                $     7,129       102,881       210,562
                                                        ===========   ===========   ===========
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-37
<PAGE>   153
 
                         NATIONAL DYNAMICS CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
                        OCTOBER 31, 1997, 1996 AND 1995
 
(1) ORGANIZATION
 
     National Dynamics Corporation (the Company) has the following operating
divisions: Lincoln Manufacturing Company (LMC), Nebraska Boiler Company
(Boiler), Energy Recovery International (ERI) and Gonzales Manufacturing Company
(GMC).
 
     Boiler, the largest of the operating divisions, contracts to manufacture,
markets and sells large industrial-use boilers. The boilers are used for
purposes of heat and energy generation in large buildings and at construction
sites. ERI's operations consist of the manufacture and installation of systems
used to operate the boilers at the most efficient rate. LMC is involved in the
manufacture of roadside structure equipment and specialty products. GMC's
operations consist mainly of steel fabrication work for use in the manufacture
of boilers. All significant transactions between divisions have been eliminated
in the financial statements.
 
     The Company's customers are located in the United States and foreign
countries. Sales to foreign customers are transacted in US dollars. Foreign
customers represent 6.8%, 16.2% and 3.5% of net sales for 1997, 1996 and 1995,
respectively. Foreign sales in 1996 included a $6,500,000 sale to a customer in
Thailand.
 
     The Company is an S Corporation and, as such, the income tax liabilities of
an S Corporation are the responsibility of the shareholders, therefore, no
provisions for federal and state income tax expense at the corporate level is
necessary.
 
(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     INVENTORIES
 
     Inventories, primarily raw materials, are stated as cost under the last-in,
first-out (LIFO) method, which is less than net realizable value.
 
     PROPERTY, PLANT AND EQUIPMENT AND DEPRECIATION
 
     Property, plant and equipment is carried at cost less accumulated
depreciation. Expenditures for maintenance, repairs and renewals of relatively
minor items are generally charged to expense as incurred. Major renewals and
improvements are capitalized. Depreciation is computed on the straight-line
method over the following estimated useful lives:
 
<TABLE>
<S>                                                             <C>
Land improvements...........................................         10 years
Buildings...................................................         40 years
Cranes and building improvements............................    10 - 40 years
Machinery and equipment.....................................     5 - 10 years
Transportation equipment....................................          5 years
</TABLE>
 
     Upon retirement or other disposition of property, plant and equipment, the
cost and related accumulated depreciation are removed from the accounts and the
resulting gain or loss is reflected in income for the period.
 
     REVENUE RECOGNITION
 
     Revenue is recognized on boiler sales utilizing the completed contract
method of accounting. Revenue is recognized in accordance with the contract
terms when title passes. Occasionally, the Company records revenue prior to
shipment ("bill and hold sales"). Bill and hold sales are typical within the
industry as the customer often requests a delay in shipment to accommodate the
customer's business purpose. Essentially, the Company provides a storage
function for the customer that is insured in the event of a loss.
 
     The Company records bill and hold sales in accordance with AAER 108 which
requires the following: the product is complete and ready for shipment, the risk
of ownership has passed to the customer, the customer
 
                                      F-38
<PAGE>   154
                         NATIONAL DYNAMICS CORPORATION
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
requests that the transaction be on a bill and hold basis and has made a fixed
commitment in writing to purchase the product at a determined price, there is a
fixed delivery schedule based on the customer's business purpose, the Company
has no further performance obligations, and the product is segregated from the
Company's other inventory and is not used to fill any other customer orders. The
Company's historical experience supports that the earnings process is complete
provided that the above criteria are met. Bill and hold sales are subject to
payment terms consistent with the Company's normal credit policies.
 
     Shipping, inspection and other costs required to install the boilers are
provided for in the appropriate accounts at the time revenue are recognized. Any
losses on contracts are recognized in the period in which they become estimable
and accruable.
 
     For nonboiler, noncontract sales, revenues and cost of sales are recognized
at the time of shipment.
 
     WARRANTY
 
     The Company offers its customers a limited warranty for approximately
eighteen months after installation of the boilers or other manufactured items.
The estimated costs of warranty are accrued and expensed at the time revenue is
recognized. Expense for the years ended October 31, 1997, 1996 and 1995 was
$300,000, $198,000 and $407,000, respectively.
 
     ADVERTISING AND RESEARCH AND DEVELOPMENT
 
     All advertising and promotion as well as research and development costs are
expensed as incurred and are not material to the Company's operations.
 
     OTHER ASSETS
 
     Other assets are primarily comprised of cash surrender value of life
insurance policies and tax deposits required of S Corporations.
 
     LONG-LIVED ASSETS
 
     Long-lived to be held and used are reviewed for impairment whenever events
or change in circumstance dictate that the related carrying amount may not be
recoverable. Recoverability of assets to be held and used is measured by
comparison of the carrying amount of an asset to future cash flows expected to
be generated by the asset. There have been no write-downs for impairment in the
financial statements.
 
     SELF-INSURANCE
 
     The Company is self-insured for payment of health claims for its employees.
The Company has established a voluntary benefit trust account (VEBA) and funds
the VEBA from time to time, as necessary, from operations. The Company has
stop-loss insurance coverage for individual claims in excess of $50,000 per
person.
 
     USE OF ESTIMATES
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
                                      F-39
<PAGE>   155
                         NATIONAL DYNAMICS CORPORATION
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(3) INVENTORIES
 
     Shown below is selected financial information reported under the LIFO
method of inventory valuation for the Company. These amounts are compared to
results had the FIFO method, which approximates replacement cost, been used for
all divisions.
 
<TABLE>
<CAPTION>
                                           1997                        1996                        1995
                                 -------------------------   -------------------------   -------------------------
                                 AS REPORTED   IF REPORTED   AS REPORTED   IF REPORTED   AS REPORTED   IF REPORTED
                                 UNDER LIFO    UNDER FIFO    UNDER LIFO    UNDER FIFO    UNDER LIFO    UNDER FIFO
                                 -----------   -----------   -----------   -----------   -----------   -----------
<S>                              <C>           <C>           <C>           <C>           <C>           <C>
Inventories, including costs
  incurred on uncompleted
  contracts...................   $ 8,325,041   $ 8,874,171   $ 6,461,728   $ 6,981,538   $ 6,409,676   $ 6,951,477
Cost of sales.................   $45,065,922   $44,986,602   $43,645,588   $43,667,579   $39,740,679   $39,681,192
Net earnings..................   $ 7,338,165   $ 7,417,485   $ 5,703,999   $ 5,682,008   $ 2,032,923   $ 2,092,410
</TABLE>
 
(4) COSTS AND BILLINGS ON UNCOMPLETED CONTRACTS
 
<TABLE>
<CAPTION>
                                                                   1997          1996
                                                                ----------    ----------
<S>                                                             <C>           <C>
Costs incurred on uncompleted contracts.....................    $5,735,446    $4,654,281
Billings on uncompleted contracts...........................     5,163,348     3,664,270
                                                                ----------    ----------
                                                                $  572,098    $  990,011
                                                                ==========    ==========
</TABLE>
 
     Included in the accompanying balance sheets under the following captions:
 
<TABLE>
<CAPTION>
                                                                   1997          1996
                                                                ----------    ----------
<S>                                                             <C>           <C>
Costs in excess of billings on uncompleted contracts........    $2,711,606    $2,661,098
Billings in excess of costs on uncompleted contracts........     2,139,508     1,671,087
                                                                ----------    ----------
                                                                $  572,098    $  990,011
                                                                ==========    ==========
</TABLE>
 
(5) PROPERTY, PLANT AND EQUIPMENT
 
     Property, plant and equipment at October 31, 1997 and 1996, at cost, are
shown below:
 
<TABLE>
<CAPTION>
                                                          1997          1996
                                                       -----------   ----------
<S>                                                    <C>           <C>
Land.................................................  $   306,211   $  306,211
Land improvements....................................      398,012      327,781
Building.............................................    5,316,118    4,387,037
Cranes and building fixtures.........................    1,194,695    1,136,888
Machinery and equipment..............................    3,694,322    3,380,120
Transportation equipment.............................      341,779      297,768
                                                       -----------   ----------
                                                       $11,251,137   $9,835,805
                                                       ===========   ==========
</TABLE>
 
(6) NOTE PAYABLE TO BANK
 
     The Company has a revolving loan agreement with a bank with a $6,000,000
maximum credit line available which expires April 1, 1999. The note accrues
interest at the rate of one percentage point under the prime rate (7.5% at
October 31, 1997). There was $1,422,000 and $1,472,000 outstanding under this
agreement at October 31, 1997 and 1996, respectively.
 
     Substantially all assets are pledged as collateral on the revolving loan
agreement. The revolving loan agreement contains certain limitations on
additional borrowing and fixed asset additions, as well as minimum
 
                                      F-40
<PAGE>   156
                         NATIONAL DYNAMICS CORPORATION
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
net worth, working capital, current ratio, cash flow and debt to tangible net
worth levels. The Company was in compliance with all the loan covenants at
October 31, 1997 and 1996.
 
(7) BENEFIT PLANS
 
     The Company has a defined benefit pension plan covering substantially all
union employees. The benefits are based on years of service and the employee's
compensation during the last five years of employment. The Company's funding
policy is to contribute annually the maximum amount that can be deducted for
federal income tax purposes. Contributions are intended to provide not only for
benefits attributed to service to date, but also for those expected to be earned
in the future.
 
     Net pension cost for 1997, 1996 and 1995 included the following components:
 
<TABLE>
<CAPTION>
                                                    1997         1996         1995
                                                  --------      -------      -------
<S>                                               <C>           <C>          <C>
Service cost-benefits earned during the
  period........................................  $ 67,762       72,786      127,406
Interest cost on projected benefit obligation...    60,266       56,709       73,870
Actual return on plan assets....................   (70,143)     (30,046)     (97,392)
Net amortization and deferral...................    11,856      (19,181)       9,016
                                                  --------      -------      -------
Net periodic pension cost.......................  $ 69,741       80,268      112,900
                                                  ========      =======      =======
</TABLE>
 
     The funded status of the pension plan as of August 1, 1997, 1996 and 1995,
the most recent actuarial valuation dates, is shown below:
 
<TABLE>
<CAPTION>
                                                              1997            1996           1995
                                                           -----------      --------      ----------
<S>                                                        <C>              <C>           <C>
Actuarial present value of benefit obligations:
  Vested -- current employees............................  $   716,313       510,090         820,983
  Nonvested..............................................       18,355         3,932          94,590
                                                           -----------      --------      ----------
          Accumulated benefit obligation.................      734,668       514,022         915,573
                                                           -----------      --------      ----------
Projected benefit obligation for service rendered to
  date...................................................  $(1,266,479)     (841,301)     (1,502,344)
Fair market value of plan assets.........................      875,521       681,002       1,100,627
                                                           -----------      --------      ----------
Projected benefit obligation in excess of plan assets....     (390,958)     (160,299)       (401,717)
Unrecognized net gain (loss) from past experience
  different from that assumed and effects of changes in
  assumptions............................................      143,303      (146,829)         16,763
Prior service costs......................................       99,675       105,344         156,192
Unrecognized net asset at August 1, 1997, 1996 and 1995
  being recognized ratably over approximately 13 years...      (33,509)      (38,049)        (41,086)
                                                           -----------      --------      ----------
Accrued pension cost included in accrued expenses........  $  (181,489)     (239,833)       (269,848)
                                                           -----------      --------      ----------
</TABLE>
 
     The assumptions used as of August 1, 1997, 1996 and 1995 in determining the
funded status information and pension expense were:
 
<TABLE>
<CAPTION>
                                                         1997       1996       1995
                                                         ----       ----       ----
<S>                                                      <C>        <C>        <C>
Discount rate..........................................  6.50%      7.25       6.50
Expected long-term inflation rate......................  4.86       4.86       4.00
Expected long-term rate of return on assets............  7.50       7.50       7.50
</TABLE>
 
     Effective January 1, 1996, the Company adopted the National Dynamics
Corporation 401(k) Plan (the Plan). This qualified Plan is a defined
contribution plan covering all nonunion employees of the Company who have one
year of service and have attained the age of twenty-one. Participants may
contribute up to 15% of their pay in pretax dollars. Participants' contributions
are 100% vested at all times. The Company made a
 
                                      F-41
<PAGE>   157
                         NATIONAL DYNAMICS CORPORATION
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
matching contribution of 50% of each participant's contributions, up to 5% of
pay for 1997 and 1996. This discretionary matching contribution by the Company
may vary from year to year. Additional amounts may be contributed at the option
of the Company's Board of Directors. Vesting in Company contributions is 100%
after five years in the Plan. Plan expenses were $112,727 and $102,709 for the
years ended October 31, 1997 and 1996, respectively.
 
(8) ACCRUED EXPENSES
 
     Accrued expenses at October 31, 1997 and 1996 are shown below:
 
<TABLE>
<CAPTION>
                                                            1997        1996
                                                         ----------   ---------
<S>                                                      <C>          <C>
Accrued wages and bonuses and commissions..............  $  938,989   1,217,315
Accrued compensated absences...........................     360,000     241,000
Accrued warranty and costs to install..................   1,735,728   1,810,793
Accrued pension benefits...............................     181,489     239,833
Other..................................................     328,921     235,786
                                                         ----------   ---------
                                                         $3,545,127   3,744,727
                                                         ==========   =========
</TABLE>
 
(9) DEFERRED COMPENSATION
 
     The Company has entered into nonqualified deferred compensation agreements
with four key employees. Each employee, upon meeting certain requirements, would
receive annual payments ranging from $10,000 to $30,000 for ten years subsequent
to retirement.
 
     Benefits will be funded with life insurance contracts purchased by the
Company. The cost of these benefits is being charged to expense and accrued
using a present value method over the expected term of employment. Expense for
the years ended 1997, 1996 and 1995 was $10,000 annually.
 
(10) FAIR VALUE OF FINANCIAL INSTRUMENTS
 
     Cash, trade accounts receivable, note payable to bank, accounts payable and
accrued expenses -- The carrying amount approximates the fair market value due
to the short maturity, less than one year, of these instruments.
 
(11) LETTERS OF CREDIT
 
     The Company is a party to six letters of credit totaling $3,651,549 at
October 31, 1997. These letters of credit are issued on behalf of the Company by
banks for certain customers as the beneficiaries. The letters of credit are for
specific jobs that are in process and expire on various dates through February
11, 1999. Management does not expect any material losses to result from these
off-balance sheet instruments because performance is not expected to be
required.
 
(12) LITIGATION
 
     In the normal course of business, the Company is involved in various claims
and suits, the majority of which are covered by insurance. Management does not
believe any of these claims or suits will result in settlements which would
materially affect the financial statements of the Company.
 
     During 1997, a dissident minority shareholder filed suit seeking a variety
of actions. Subsequent to year-end, a conditional settlement was reached with no
cost other than insignificant legal fees to the Company.
 
(13) LEASE
 
     The Company leases a vehicle under a noncancelable operating lease that
expires in August 1998. The monthly lease expense is $1,330 and the future
minimum lease payments as of October 31, 1997 are $13,300.
 
                                      F-42
<PAGE>   158
 
                         NATIONAL DYNAMICS CORPORATION
                            CONDENSED BALANCE SHEETS
                      MARCH 31, 1998 AND OCTOBER 31, 1997
 
<TABLE>
<CAPTION>
                                                               MARCH 31,    OCTOBER 31,
                                                                 1998          1997
                                                              -----------   -----------
                                                              (unaudited)
<S>                                                           <C>           <C>
                           ASSETS
Current assets:
  Cash and cash equivalents of $3,292,000 and $-0- in 1998
     and 1997, respectively                                   $ 3,544,149       66,883
  Trade accounts receivable (including retainage of
     $1,270,445 and $1,822,957 in 1998 and 1997,
     respectively, net of allowance for doubtful accounts of
     $750,000 in 1998 and 1997)                                11,837,261   13,398,380
Inventories                                                     1,552,911    2,589,595
  Costs in excess of billings on uncompleted contracts                 --    2,711,606
  Prepaid expenses                                                     --      134,807
                                                              -----------   ----------
Total current assets                                           16,934,321   18,901,271
                                                              -----------   ----------
Property, plant and equipment, at cost                         11,473,539   11,251,137
Less accumulated depreciation                                   5,071,615    4,871,991
                                                              -----------   ----------
Net property, plant and equipment                               6,401,924    6,379,146
                                                              -----------   ----------
Other assets                                                      739,565      710,920
                                                              -----------   ----------
                                                              $24,075,810   25,991,337
                                                              ===========   ==========
            LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Note payable to bank                                        $        --    1,422,000
  Accounts payable                                              3,348,533    4,247,628
  Accrued expenses                                              3,040,248    3,545,127
  Billings in excess of cost on uncompleted contracts           1,488,031    2,139,508
  Stockholders' dividends payable                                      --      500,000
                                                              -----------   ----------
Total current liabilities                                       7,876,812   11,854,263
Deferred compensation                                             144,200      140,000
                                                              -----------   ----------
Total liabilities                                               8,021,012   11,994,263
                                                              -----------   ----------
Stockholders' equity:
  Common stock of $1 par value per share. Authorized 20,000
     shares; issued and outstanding 8,000 shares                    8,000        8,000
  Additional paid-in capital                                       81,186       81,186
  Retained earnings                                            15,965,612   13,907,888
                                                              -----------   ----------
Total stockholders' equity                                     16,054,798   13,997,074
                                                              -----------   ----------
Commitments and contingencies
                                                              $24,075,810   25,991,337
                                                              ===========   ==========
</TABLE>
 
                 See accompanying note to financial statements.
 
                                      F-43
<PAGE>   159
 
                         NATIONAL DYNAMICS CORPORATION
                        CONDENSED STATEMENTS OF EARNINGS
             FIVE-MONTHS ENDED MARCH 31, 1998 AND 1997 (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                 1998          1997
                                                                 ----          ----
<S>                                                           <C>           <C>
Net sales                                                     $24,970,357   21,719,660
Cost of sales                                                  19,576,782   17,117,005
                                                              -----------   ----------
Gross profit                                                    5,393,575    4,602,655
Selling, general and administrative expenses                    2,471,501    1,887,790
                                                              -----------   ----------
Operating income                                                2,922,074    2,714,865
Other income                                                      397,661      312,024
Other deductions, including interest expense of $60,772 and
  $75,933 in 1998 and 1997, respectively                          (62,011)     (76,214)
                                                              -----------   ----------
Net earnings                                                  $ 3,257,724    2,950,675
                                                              ===========   ==========
</TABLE>
 
                 See accompanying note to financial statements.
 
                                      F-44
<PAGE>   160
 
                         NATIONAL DYNAMICS CORPORATION
                       CONDENSED STATEMENTS OF CASH FLOWS
             FIVE-MONTHS ENDED MARCH 31, 1998 AND 1997 (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                 1998          1997
                                                                 ----          ----
<S>                                                           <C>           <C>
Cash Flows from operating activities:
  Net earnings                                                $ 3,257,724    2,950,675
  Adjustments to reconcile net earnings to net cash provided
     by operating activities:
     Depreciation                                                 199,625      192,999
     Change in assets and liabilities:
       Accounts receivable                                      1,561,119   (2,994,452)
       Inventories                                              1,036,684      730,968
       Costs in excess of billings on uncompleted contracts     2,711,606    2,661,098
       Prepaid expenses                                           134,807     (168,897)
       Other assets                                               (28,645)     (26,175)
       Accounts payable                                          (899,095)    (444,702)
       Accrued expenses                                          (504,879)    (834,268)
       Billings in excess of costs on uncompleted contracts      (651,477)   1,087,689
       Deferred compensation                                        4,200        4,200
                                                              -----------   ----------
Net cash provided by operating activities                       6,821,669    3,159,135
                                                              -----------   ----------
Cash flows from investing activities:
  Capital expenditures                                           (222,403)    (262,493)
                                                              -----------   ----------
Cash flows from financing activities:
  Dividends paid                                               (1,700,000)  (1,100,000)
  Net payments on note payable to bank                         (1,422,000)  (1,472,000)
                                                              -----------   ----------
Net cash used in financing activities                          (3,122,000)  (2,572,000)
                                                              -----------   ----------
Net increase in cash and cash equivalents                       3,477,266      324,642
Cash and cash equivalents at beginning of year                     66,883      222,415
                                                              -----------   ----------
Cash and cash equivalents at end of year                      $ 3,544,149      547,057
                                                              ===========   ==========
Supplemental cash flow information:
  Cash paid for interest                                      $    60,772       75,993
                                                              ===========   ==========
</TABLE>
 
                 See accompanying note to financial statements.
 
                                      F-45
<PAGE>   161
 
                         NATIONAL DYNAMICS CORPORATION
               NOTE TO CONDENSED FINANCIAL STATEMENTS (UNAUDITED)
                                 MARCH 31, 1998
 
BASIS OF PRESENTATION
 
     The accompanying unaudited condensed financial statements of National
Dynamics Corporation (the Company), include all adjustments necessary for a fair
statement of earnings for each period shown, in the opinion of management. All
such adjustments made are of a normal recurring nature. The balance sheet at
October 31, 1997 is derived from the audited balance sheet as of that date.
Certain information and footnote disclosures normally included in financial
statements prepared in accordance with generally accepted accounting principles
have been condensed or omitted. Management believes that the disclosures made
are adequate and that the information is fairly presented; costs and billings on
uncompleted contracts are presented net in the interim financial statement. The
results for the interim periods are not necessarily indicative of the results
for the full year. These financial statements should be read in conjunction with
the audited financial statements and notes thereto for the years ended October
31, 1997, 1996 and 1995.
 
                                      F-46
<PAGE>   162
 
             ------------------------------------------------------
NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS AND,
IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS
HAVING BEEN AUTHORIZED BY THE COMPANY OR ANY INITIAL PURCHASER. THIS PROSPECTUS
DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF
THE SECURITIES OFFERED HEREBY IN ANY JURISDICTION TO ANY PERSON TO WHOM IT IS
UNLAWFUL TO MAKE SUCH AN OFFER IN SUCH JURISDICTION. NEITHER THE DELIVERY OF
THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES,
CREATE ANY IMPLICATION THAT THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF
ANY TIME SUBSEQUENT TO THE DATE HEREOF OR THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE SUCH DATE. UNTIL APRIL 6, 1999 ALL DEALERS
EFFECTING TRANSACTIONS IN THE REGISTERED SECURITIES, WHETHER OR NOT
PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS.
THIS IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A PROSPECTUS WHEN
ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR
SUBSCRIPTIONS.
                               ------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                         PAGE
                                       ---------
<S>                                    <C>
Summary..............................       1
Risk Factors.........................      16
The Exchange Offer...................      24
Capitalization.......................      34
Unaudited Pro Forma Financial Data...      35
Selected Financial Data of
  Aqua-Chem..........................      41
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations of Aqua-Chem.........      43
Selected Financial Data of NDC.......      50
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations of NDC...............      51
Business of the Company..............      53
Management...........................      64
Capital Stock and Principal
  Stockholders.......................      71
Certain Relationships and Related
  Transactions.......................      76
The Acquisition......................      78
Description of Certain
  Indebtedness.......................      79
Description of the Notes.............      80
Material United States Federal Income
  Tax Considerations.................     107
Plan of Distribution.................     109
Legal Matters........................     110
Independent Auditors.................     110
Available Information................     110
Index to Financial Statements........     F-1
</TABLE>
    
 
             ------------------------------------------------------
             ------------------------------------------------------
 
                                [AQUA-CHEM LOGO]
                                  $125,000,000
                                 11 1/4% Senior
                               Subordinated Notes
                                    Due 2008
 
                                   PROSPECTUS
 
             ------------------------------------------------------
<PAGE>   163


                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS


ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS

         Section 145 of the Delaware General Corporation Law, as amended,
provides in regards to indemnification of directors and officers as follows:

         145. Indemnification of Officers, Directors, Employees
and Agents; Insurance.

                (a) A corporation shall have power to indemnify any person who
          was or is a party or is threatened to be made a party to any
         threatened, pending or completed action, suit or proceeding, whether
         civil, criminal, administrative or investigative (other than an action
         by or in the right of the corporation) by reason of the fact that the
         person is or was a director, officer, employee or agent of the
         corporation, or is or was serving at the request of the corporation as
         a director, officer, employee or agent of another corporation,
         partnership, joint venture, trust or other enterprise, against expenses
         (including attorneys' fees), judgments, fines and amounts paid in
         settlement actually and reasonably incurred by the person in connection
         with such action, suit or proceeding if the person acted in good faith
         and in a manner the person reasonably believed to be in or not opposed
         to the best interests of the corporation, and, with respect to any
         criminal action or proceeding, had no reasonable cause to believe the
         person's conduct was unlawful. The termination of any action, suit or
         proceeding by judgment, order, settlement, conviction, or upon a plea
         of nolo contendere or its equivalent, shall not, of itself, create a
         presumption that the person did not act in good faith and in a manner
         which the person reasonably believed to be in or not opposed to the
         best interests of the corporation, and, with respect to any criminal
         action or proceeding, had reasonable cause to believe that the person's
         conduct was unlawful.

                (b) A  corporation  shall have power to indemnify any person who
         was or is a party or is threatened to be made a party to any
         threatened, pending or completed action or suit by or in the right of
         the corporation to procure a judgment in its favor by reason of the
         fact that the person is or was



<PAGE>   164

       
         a director, officer, employee or agent of the corporation, or is or was
         serving at the request of the corporation as a director, officer,
         employee or agent of another corporation, partnership, joint venture,
         trust or other enterprise against expenses (including attorneys' fees)
         actually and reasonably incurred by the person in connection with the
         defense or settlement of such action or suit if the person acted in
         good faith and in a manner the person reasonably believed to be in or
         not opposed to the best interests of the corporation and except that no
         indemnification shall be made in respect of any claim, issue or matter
         as to which such person shall have been adjudged to be liable to the
         corporation unless and only to the extent that the Court of Chancery or
         the court in which such action or suit was brought shall determine upon
         application that, despite the adjudication of liability but in view of
         all the circumstances of the case, such person is fairly and reasonably
         entitled to indemnity for such expenses which the Court of Chancery or
         such other court shall deem proper.

                (c) To the extent that a present or former director or
         officer of a corporation has been successful on the merits or otherwise
         in defense of any action, suit or proceeding referred to in subsections
         (a) and (b)of this section, or in defense of any claim, issue or matter
         therein, such person shall be indemnified against expenses (including
         attorneys' fees) actually and reasonably incurred by such person in
         connection therewith.

                (d) Any indemnification under subsections (a) and (b) of this
         section (unless ordered by a court) shall be made by the corporation
         only as authorized in the specific case upon a determination that
         indemnification of the present or former director, officer, employee or
         agent is proper in the circumstances because the person has met the
         applicable standard of conduct set forth in subsections (a) and (b) of
         this section. Such determination shall be made, with respect to a
         person who is a director or officer at the time of such determination,
         (1) by a majority vote of the directors who are not parties to such
         action, suit or proceeding, even though less than a quorum, or (2) by a
         committee of such directors designated by majority vote of such
         directors, even though less than a quorum, or (3) if there are no such
         directors, or if such directors so direct, by independent legal counsel
         in a written opinion, or (4) by the stockholders.



<PAGE>   165

                (e) Expenses (including attorneys' fees) incurred by an officer
         or director in defending any civil, criminal, administrative or
         investigative action, suit or proceeding may be paid by the corporation
         in advance of the final disposition of such action, suit or proceeding
         upon receipt of an undertaking by or on behalf of such director or
         officer to repay such amount if it shall ultimately be determined that
         such person is not entitled to be indemnified by the corporation as
         authorized in this section. Such expenses (including attorneys' fees)
         incurred by former directors or officers or other employees and agents
         may be so paid upon such terms and conditions, if any, as the
         corporation deems appropriate.

                (f) The indemnification and advancement of expenses provided by,
         or granted pursuant to, the other subsections of this section shall not
         be deemed exclusive of any other rights to which those seeking
         indemnification or advancement of expenses may be entitled under any
         bylaw, agreement, vote of stockholders or disinterested directors or
         otherwise, both as to action in such person's official capacity and as
         to action in another capacity while holding such office.

                (g) A corporation shall have power to purchase and maintain
         insurance on behalf of any person who is or was a director, officer,
         employee or agent of the corporation, or is or was serving at the
         request of the corporation as a director, officer, employee or agent of
         another corporation, partnership, joint venture, trust or other
         enterprise against any liability asserted against such person and
         incurred by such person in any such capacity, or arising out of his
         status as such, whether or not the corporation would have the power to
         indemnity him against such liability under this section.

                (h) For purposes of this Section, references to "the 
         corporation" shall include, in addition to the resulting corporation,
         any constituent corporation (including any constituent of a
         constituent) absorbed in a consolidation or merger which, if its
         separate existence had continued, would have had power and authority to
         indemnify its directors, officers, and employees or agents, so that any
         person who is or was a director, officer, employee or agent of such
         constituent corporation, or is or was serving at the request of such
         constituent corporation as a director, officer, employee or agent of
         another corporation, partnership, joint



<PAGE>   166

         venture, trust or other enterprise, shall stand in the same position
         under the provisions of this section with respect to the resulting or
         surviving corporation as such person would have with respect to such
         constituent corporation if its separate existence had continued.

                (i) For purposes of this section, references to "other 
         enterprises" shall include employee benefit plans; references to
         "fines" shall include any excise taxes assessed on a person with
         respect to any employee benefit plan; and references to "serving at the
         request of the corporation" shall include any service as a director,
         officer, employee or agent of the corporation which imposes duties on,
         or involves services by, such director, officer, employee, or agent
         with respect to an employee benefit plan, its participants, or
         beneficiaries; and a person who acted in good faith and in a manner
         such person reasonably believed to be in the interest of the
         participants and beneficiaries of an employee benefit plan shall be
         deemed to have acted in a manner "not opposed to the best interests of
         the corporation" as referred to in this section.

                (j) The indemnification and advancement of expenses provided 
         by, or granted pursuant to, this section shall, unless otherwise
         provided when authorized or ratified, continue as to a person who
         has ceased to be a director, officer, employee or agent and shall inure
         to the benefit of the heirs, executors and administrators of such a
         person.

                (k) The Court of Chancery is hereby vested with exclusive
         jurisdiction to hear and determine all actions for advancement of
         expenses or indemnification brought under this section or under any
         bylaw, agreement, vote of stockholders or disinterested directors, or
         otherwise. The Court of Chancery may summarily determine a
         corporation's obligation to advance expenses (including attorneys
         fees).




<PAGE>   167

                Section 102(b)(7) of the Delaware General Corporation Law, as 
         amended, provides in regard to the limitation of liability of directors
         and officers as follows --

                (b) In addition to the matters required to be set forth in the
         certificate of incorporation by subsection (a) of this section, the
         certificate of incorporation may also contain any or all of the
         following matters:

                                             * * * *

                (7) A provision eliminating or limiting the personal liability
         of a director to the corporation or its stockholders for monetary
         damages for breach of fiduciary duty as a director, provided that such
         provision shall not eliminate or limit the liability of a director: (i)
         for any breach of the director's duty of loyalty to the corporation or
         its stockholders; (ii) for acts or omissions not in good faith or which
         involve intentional misconduct or a knowing violation of law; (iii)
         under Section 174 of this title; or (iv) for any transaction from which
         the director derived an improper personal benefit. No such provision
         shall eliminate or limit the liability of a director for any act or
         omission occurring prior to the date when such provision becomes
         effective. All references to this paragraph to a director shall also be
         deemed to refer (x) to a member of the governing body of a corporation
         which is not authorized to issue capital stock, and (y) to such other
         person or persons, if any, who, pursuant to a provision of the
         certificate of incorporation in accordance with ss.141(a) of this
         title, exercise or perform any of the powers or duties otherwise
         conferred or imposed upon the board of directors by this title.

         Article 7 of the Registrant's Certificate of Incorporation, as amended,
provides in regard to the limitation of liability of directors and officers as
follows:

                No director shall be liable to the Company or any of its
         stockholders for monetary damages for breach of fiduciary duty as a
         director, except with respect to (1) a breach of director's duty of
         loyalty to the Company or its stockholders, (2) acts or omissions not
         in good faith or which involve intentional misconduct or a knowing
         violation of the law, (3) liability under Section 174 of the Delaware
         General Corporation Law or (4) a transaction from which the director
         derived an improper personal benefit, it being the intention of the
         foregoing provision to eliminate the



<PAGE>   168
         liability of the Company's directors to the Company or its stockholders
         to the fullest extent permitted by Section 102(b)(7) of the Delaware
         General Corporation Law, as amended from time to time. The Company
         shall indemnify to the fullest extent permitted by Sections 102(b)(7)
         and 145 of the Delaware General Corporation Law, as amended from time
         to time, each person that such Sections grant the Company the power to
         indemnify.

         Article 8 of Registrant's By-Laws provide, in summary, that the
corporation will indemnify present or former directors, officers employees or
agents (including those acting at the request of the Corporation in such role
for another entity) against amounts owed in connection with any proceeding
regarding action taken while serving in such role. The indemnification is to the
fullest extent as permitted by applicable law. With regard to directors and
officers, repeal or modification of that section of the by-laws or other
applicable laws will not change the obligations of the corporation in effect at
the time of the act giving rise to the proceeding. The right to indemnification
is not exclusive of any other rights to which the parties may be entitled. The
Corporation shall also have the power to purchase and maintain insurance on
behalf of any such person, without regard to whether the Corporation has the
power to indemnify that person under the by-laws or applicable law.

         The Registrant has entered into indemnification agreements with
Jeffrey A. Miller, the Registrant's Chairman, President and Chief Executive
Officer and William B. Killian and James W. Hook, each a Director of the
Registrant, pursuant to which the Registrant has agreed to indemnify them
against Expenses (as defined therein) and Liability (as defined therein)
arising out of their employment by or position as a director of the Registrant.
Rights to indemnification under these indemnification agreements  are generally
consistent with, and are specifically defined to include, the  fullest extent
of the rights under the Delaware General Corporation Law, and the Registrant's
Certificate of Incorporation and Bylaws set forth as described above.

ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

         The Exhibit Index attached hereto following the Signature Pages is
incorporated herein by reference.


ITEM 22. UNDERTAKINGS

The undersigned Registrant hereby undertakes:

         (a) (1)   To file, during any period in which offers or sales are being
made, a post-effective amendment to this registration statement:

             (i)   To include any prospectus required by Section 10(a)(3) of the
         Securities Act of 1933;

             (ii)  To reflect in the prospectus any facts or events arising
         after the effective date of the registration statement (or the most
         recent post-effective amendment thereof) which, individually or in the
         aggregate, represent a fundamental change in the information set forth
         in the registration statement. Notwithstanding the foregoing, any
         increase or decrease in volume of securities offered (if the total
         dollar value of securities offered would not exceed that which was
         registered) and any deviation from the low or high end of the estimated
         maximum offering range may be reflected in the form of prospectus filed
         with the Commission pursuant to Rule 424(b) if, in the aggregate, the
         changes in volume and price represent no more than a 20 percent change
         in the maximum aggregate offering price set forth in the "Calculation
         of Registration Fee" table in the effective registration statement;

             (iii) To include any material information with respect to the plan
         of distribution not previously disclosed in the registration statement
         or any material change to such information in the registration
         statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the 
registration statement is on Form S-3, Form S-8 or Form F-3, and the 
information required to be included in a post-effective amendment by those 
paragraphs is contained in periodic reports filed with or furnished to the 
Commission by the registrant pursuant to Section 13 or 15(d) of the Securities 
Exchange Act of 1934 that are incorporated by reference in the registration 
statement.

             (2)   That, for the purpose of determining any liability under the
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

             (3)   To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the
termination of the offering.

             (4)   If the registrant is a foreign private issuer, to file a
post-effective amendment to the registration statement to include any financial
statements required by Rule 3-19 of this chapter at the start of any delayed
offering or throughout a continuous offering. Financial statements and
information otherwise required by Section 10(a)(3) of the Act need not be
furnished, provided, that the registrant includes in the prospectus, by means of
a post-effective amendment, financial statements required pursuant to this
paragraph (a)(4) and other information necessary to ensure that all other
information in the prospectus is at least as current as the date of those
financial statements. Notwithstanding the foregoing, with respect to
registration statements on Form F-3, a post-effective amendment need not be
filed to include financial statements and information required by Section
10(a)(3) of the Act or Rule 3-19 of this chapter if such financial statements
and information are contained in periodic reports filed with or furnished to the
Commission by the registrant pursuant to Section 13 or Section 15(d) of the
Securities Exchange Act of 1934 that are incorporated by reference in the Form
F-3.

         (b) That, for purposes of determining any liability under the
Securities Act of 1933, each filing of the Registrant's annual report pursuant
to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 that is
incorporated by reference in the registration statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be the initial bona fide offering
thereof.

         (c) Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers, and persons
controlling the Registrant pursuant to the foregoing



<PAGE>   169

provisions or otherwise, the Registrant has been advised that in the opinion of
the Securities and Exchange Commission such indemnification is against public
policy as expressed in the Securities Act and is, therefore, unenforceable. In
the event that a claim for indemnification against such liabilities (other than
the payment by the Registrant of expenses incurred or paid by a director,
officer or person controlling the Registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer, or person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of such issue.


         (d) To respond to requests for information that is incorporated by
reference into the Prospectus pursuant to Item 4, 10(b), 11 or 13 of Form S-4,
within one business day of receipt of such request, and to send the incorporated
documents by first-class mail or equally prompt means. This includes information
contained in documents filed subsequent to the effective date of the
registration statement through the date responding to the request.

         (e) To supply by means of a post-effective amendment all information
concerning a transaction, and the company being acquired involved therein, that
was not the subject of and included in the registration statement when it became
effective.






<PAGE>   170

                                   SIGNATURES
   
         Pursuant to the requirements of the Securities Act of 1933, Aqua- Chem,
Inc. has duly caused this Registration Statement on Form S-4 to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Milwaukee,
State of Wisconsin, on this 4th day of January, 1999.


                                     By:  /s/  J. Scott Barton
                                          ------------------------------------
                                   Name:  J. Scott Barton
                                  Title:  Vice President and
                                          Chief Financial Officer

    

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and as of the date indicated below.



- ----------------------------     ---------------------------    
       Signature                           Title               
                                                               
                                                               
   
Principal Executive Officer:                                   
                                                               
Jeffrey A. Miller*                                        
- -------------------------------   President and Chief          
Jeffrey A. Miller                 Executive Officer            
                                                               
                                                               
Principal Financial and Accounting Officer:                    
                                                               
/s/ J. Scott Barton                                             
- -------------------------------   Vice President and Chief        
J. Scott Barton                   Financial Officer            
                                                               
Board of Directors:                                            
                                                               
                                                               
Jeffrey A. Miller*                                        
- -------------------------------   Director (Chairman of        
Jeffrey A. Miller                 the Board)                   
                                                               
                                                               
James H. Fordyce *                Director                     
- -------------------------------                                
James H. Fordyce     
    
                                          
                                                               



<PAGE>   171

- --------------------------  -------------------------------- 
    Signature                            Title               
                                                             
                                                             
    James W. Hook      *                                     
- -------------------------                                    
James W. Hook               Director                         
                                                             
    William P. Killian *                                     
- -------------------------   Director                         
William P. Killian                                           
                                                             
    Michael R. Stone   *                                     
- -------------------------   Director                         
Michael R. Stone

   
*   J. Scott Barton, by signing his name hereto does sign this document on
    behalf of the persons indicated above as of this 4th day of January, 1999,
    pursuant to the powers of attorney duly executed by such persons and
    filed as Exhibit 24.1 to this Amendment No. 6 to Form S-4 Registration
    Statement.


                                               By: /s/ J. Scott Barton  
                                                  ----------------------------
                                                  J. Scott Barton  
                                                  Attorney-in-Fact

    
<PAGE>   172
                                  EXHIBIT INDEX
                                      TO
   
                                AMENDMENT NO. 6
    


                                      TO
                      REGISTRATION STATEMENT ON FORM S-4
                                       OF
                                 AQUA-CHEM, INC.
- --------------------------------------------------------------------------------


EXHIBIT                        DESCRIPTION                              FILED  
Number                                                                HEREWITH 
             


    2.1   Asset Purchase Agreement dated May                             (1)
          28, 1998 among Aqua-Chem, Inc.,                     
          National Dynamics Corporation, and                  
          certain shareholders of National                    
          Dynamics Corporation                                

                                                              
    3.1   Aqua-Chem, Inc. Certificate of                                 (1)
          Incorporation (incorporating amendments)
                                                              
    3.2   Aqua-Chem, Inc. Bylaws                                         (1)
                                                              
    4.1   Indenture of Trust dated June 23,                              (1)
          1998 between Aqua-Chem, Inc. and                    
          United States Trust Company of New                  
          York, as Trustee                                    
                                                              
    4.2   Form of Aqua-Chem, Inc. 11-1/4%                                (2) 
          Senior Subordinated Note Due 2008,                  
          to be issued in the Exchange Offer                  
          subject to this Registration                        
          Statement                                           
                                                              
    4.3   Form of Aqua-Chem, Inc. 11-1/4%                                (3)
          Senior Subordinated Note Due 2008                   
          issued on June 23, 1998                             
                                                              
 
    ----------------

    (1)   Previously filed.        

    (2)   Included as Exhibit A to the Indenture of 
          Trust included as Exhibit 4.1 to this 
          Registration Statement.

    (3)   Included as Exhibit 1 to the Rule 144A/
          Regulation S Appendix to the Indenture
          of Trust included as Exhibit 4.1 to this
          Registration Statement.       

          
          
          




<PAGE>   173
- --------------------------------------------------------------------------------


EXHIBIT                         DESCRIPTION                              FILED
NUMBER                                                                 HEREWITH 


                                              

   4.4   Common Stock Purchase Warrant dated July 31, 1997               (1)

   
                                                           
   5.1   Opinion of Whyte Hirschboeck Dudek S.C. as to 
         legality of securities subject to this Registration 
         Statement                                                        X
         
    

   

   5.2   Opinion of Morrison Cohen Singer & Weinstein, LLP                X
         as to legality of securities subject to this 
         Registration Statement                                           
    
                                                           
   9.1   Stockholders' and Members' Agreement                            (1)
         dated July 31, 1997 among the                     
         Stockholders of Aqua-Chem, Inc. and               
         the Members of Rush Creek, LLC.                   
                                                           
   10.1  Credit Agreement dated June 23, 1998                            (1)
         among Aqua-Chem, Inc. and Comerica                
         Bank                                             
                                                           
   10.2  Registration Rights Agreement dated                             (1)
         June 18, 1998 among Aqua-Chem,                    
         Inc., Credit Suisse First Boston                  
         Corporation, and Bear, Stearns &                  
         Co. Inc.                                         
                                                           
   10.3  Employment Agreement dated July 31,                             (1)
         1997 between Aqua-Chem, Inc. and                  
         Jeffrey A. Miller, as amended                     
                                                           
   10.4  Employment Agreement dated February                             (1)
         5, 1997 between Aqua-Chem, Inc.                   
         and Rand E. McNally, as amended                   
                                                           
   10.5  Employment Agreement dated January                              (1)
         20, 1997 between Aqua-Chem, Inc.                  
         and J. Scott Barton, as amended                   
                                                           
   10.6  Employment Agreement dated January 7, 1997                      (1)
         between Aqua-Chem, Inc. and                       
         Charles J. Norris, as amended                     
                                                           
   10.7  Employment Agreement dated September 1, 1997                    (1)
         between Aqua-Chem, Inc. and                       
         Daniel L. Johnson, as amended                     
                                                           

   ------------------
   (1) Previously filed.         

<PAGE>   174


- --------------------------------------------------------------------------------


EXHIBIT                         DESCRIPTION                              FILED 
NUMBER                                                                 HEREWITH 


                                            

   10.8   Interim Management Agreement dated July 8,                     (1)
          1996 between Aqua-Chem, Inc.,
          J. Miller Management, Inc. and Jeffery A.                        
          Miller                                                           

   10.9   Aqua-Chem, Inc. 1997 Stock Option                              (1)
          Plan Amended and Restated

   10.10  Aqua-Chem, Inc. Management Incentive                           (1)
          Plan approved November 15, 1996                     

   10.11  Aqua-Chem, Inc. Executive Management                           (1) 
          Incentive  Plan approved November                   
          15, 1996                                            
                                                              
   10.12  Aqua-Chem, Inc. 1998 Phantom Stock Plan                        (1)
                                                              
   10.13  Amendment to Interim Management Agreement                      (1)
          between Aqua-Chem, Inc., J. Miller Management,
          Inc. and Jeffrey A. Miller      

   10.14  Aqua-Chem, Inc. 11 1/4% Senior Subordinated                    (1)
          Notes Due 2008, Purchase Agreement dated            
          June 18, 1998                                       
                                                              
   10.15  Consulting Agreement with Verlyn Westra dated                  (1)
          June 19, 1998                                       
                                                              
   10.16  Consulting Agreement with Roger Swanson dated                  (1)
          June 19, 1998                                       
                                                              
                                                              
   10.17  Amended and Restated Securities Purchase                       (1)
          Agreement dated December 5, 1997 by and among      
          Rush Creek, LLC, A-C Acquisition Corp., CB-Kramer
          Sales and Service, Inc., Whitney Subordinated Debt
          Fund, LP, and Whitney Equity Partners, LP                            
             
                                                              
   10.18  First Amendment and Consent Agreement dated June               (1)
          23, 1998, by and among Rush Creek, LLC, 
          A-C Acquisition Corp., CB-Kramer Sales and 
          Service, Inc., Whitney Subordinated Debt Fund, LP,
          and Whitney Equity Partners, LP 

   10.19  Letter Agreement with William P. Killian                       (1)
          dated December 17, 1997

   10.20  Letter Agreement with James W. Hook dated                      (1)
          February 11, 1998     

- ------------------
(1) Previously filed.               

<PAGE>   175
- --------------------------------------------------------------------------------


EXHIBIT                         DESCRIPTION                              FILED 
NUMBER                                                                 HEREWITH 

   
   10.21  Agreement and Plan of Reorganization                          (1)
          dated July 31, 1997 among Lyonnaise                            
          American Holding, Inc., Gestra                                 
          Corporation N.V., Rush Creek LLC,                              
          Aqua-Chem, Inc., A-C Acquisition                               
          Corp. and Jeffrey A. Miller                                    
    

          [OMITTED PROVISIONS SUBJECT TO CONFIDENTIAL 
          TREATMENT BY ORDER OF THE SECURITIES AND 
          EXCHANGE COMMISSION] 

   
   10.22  Amendment dated June 22, 1998 to Agreement                    (1)
          and Plan of Reorganization among                    
          Lyonnaise American Holding, Inc.,                   
          Gestra Corporation N.V., Rush Creek                 
          LLC, Aqua-Chem, Inc., A-C                           
          Acquisition Corp. and Jeffrey A.                    
          Miller                                              
    

          [OMITTED PROVISIONS SUBJECT TO CONFIDENTIAL 
          TREATMENT BY ORDER OF THE SECURITIES
          AND EXCHANGE COMMISSION] 
   
   10.23  Employment Agreement dated August 13, 1998          
          between Aqua-Chem, Inc. and Daniel B. Teich                   (1)

   10.24  Aqua-Chem, Inc. 1998 Stock Option Plan                        (1)

   12.1  Statements Regarding Computation of Ratios                     (4)

   16.1  Letter regarding change in Certifying Accountant               (1)

   21.1  Subsidiaries of the Registrant                                 (1) 
                                                                         
   
   23.1  Consent of Arthur Andersen LLP                                 (1)
    
                                                                         
   
   23.2  Consent of KPMG Peat Marwick LLP, Milwaukee,                      
         Wisconsin                                                      (1)   
    
   
   
   23.3  Consent of KPMG Peat Marwick LLP, Omaha, Nebraska              (1)
    

   23.4  Consent of Whyte Hirschboeck Dudek S.C.                        (1)
   
   23.5  Consent of Morrison Cohen Singer & Weinstein, LLP              (5) 
                                               
   24.1  Powers of Attorney of Directors and Officers of                
         Aqua-Chem, Inc.                                                (1)
                                                                         
   25.1  Statement of Eligibility of United States Trust                (1) 
         Company of New York as Trustee under the Indenture              
         on Form T-1 under the Trust Indenture Act of 1939,              
         as amended                                                      
                                                                         
                                                                         
   27.1  Financial Data Schedule (12 months ended 12/31/95)             (1) 
                                                                         
   27.2  Financial Data Schedule (12 months ended 12/31/96)             (1) 
                                                                         
   27.3  Financial Data Schedule (7 months ended 7/31/97)               (1) 
                                                                         
   27.4  Financial Data Schedule (5 months ended 12/31/97)              (1) 
                                                                         
   27.5  Financial Data Schedule (6 months ended 6/30/98)               (1) 
   
   99.1  Letter of Transmittal                                           X
- -------------------------
         (1)  Previously filed.           

         (4)  Included in the Prospectus which forms a part of this Registration
              Statement immediately following the consolidated condensed 
              financial statements of Aqua-Chem, Inc.
   
         (5)  Included in Exhibit 5.2 to this Registration Statement.         
    
<PAGE>   176
- --------------------------------------------------------------------------------


EXHIBIT                         DESCRIPTION                              FILED 
NUMBER                                                                 HEREWITH 





   99.2     Instructions to Holders of Aqua-Chem, Inc.                    X
            11-1/4% Senior Subordinated Notes Due 2008
                                                        
   99.3     Notice of Guaranteed Delivery                                 X

                                 

<PAGE>   1
                                                                     EXHIBIT 5.1



   
January 5, 1999
    


Aqua-Chem, Inc.
7800 North 113th Street
P.O. Box 421
Milwaukee, WI 53201


         Re:      Form S-4 Registration Statement for Aqua-Chem, Inc.
                  $125,000,000 11 1/4% Senior Subordinated Notes Due 2008


Gentlemen:
   
         We have acted as counsel to Aqua-Chem, Inc., (the "Company" or
"Registrant") in connection with the preparation and filing of the
above-referenced Registration Statement and the proposed issuance by the Company
of up to $125,000,000 of its 11 1/4% Senior Subordinated Notes Due 2008 (the
"Exchange Notes" or the "Securities") in an exchange offer for the Company's
existing 11 1/4% Senior Subordinated Notes Due 2008 issued on June 23, 1998 (the
"Existing Notes"), to which Securities the Registration Statement relates.  
Capitalized terms not otherwise defined herein shall have the meanings assigned 
thereto in the Registration Statement.
    

         We have also examined the Certificate of Incorporation and By-Laws of
the Registrant, certain corporate resolutions of the Registrant, and such other
documents, records, certificates and agreements, and have made such legal and
factual investigations, as we have deemed necessary to enable us to render the
opinions expressed herein. As to the various matters of a factual nature forming
the basis for our opinions herein, we have relied, to the extent we deemed
appropriate, upon various representations made and information furnished to us
by various representatives of the Registrant. We have assumed the authenticity
of all documents and instruments represented to us to be originals and the
conformity to originals of all documents and instruments represented to us to be
copies of originals.

         We are admitted to the Bar of the State of Wisconsin. In rendering the
opinions expressed herein, we express no opinion as to matters involving the
application of laws other than the laws of the State of Wisconsin, the corporate
laws of the State of Delaware or the federal laws of the United States. We note
that the Indenture and the Securities are governed by the law of the State of
New York.



<PAGE>   2


   
         Based on the foregoing, it is our opinion that the Securities being
offered by the Registrant, when issued against payment of the consideration
therefor (consisting of the exchange of a like amount of Existing Notes) as
contemplated by the Registration Statement, will be legally issued and will be 
the valid, legal and binding obligations of the Company enforceable against the 
Company in accordance with their terms. Our opinion expressed herein as to 
enforceability is subject to and limited in each case by the effect of (1) 
bankruptcy, insolvency, reorganization, arrangement, moratorium, and other laws 
affecting or relating to the rights of creditors generally, including, without
limitation, any statutory or other law regarding fraudulent conveyances, and (2)
rules of law governing specific performance, injunctive relief, or other 
equitable remedies and general principles of equity.
    

         We consent to the filing of this opinion as an exhibit to the
above-referenced Registration Statement and any amendments thereto (including
post-effective amendments) and to the reference to this firm and to this opinion
under the caption "LEGAL MATTERS" in the Prospectus which forms a part of the
Registration Statement.

                                                Very truly yours,

                                                WHYTE HIRSCHBOECK DUDEK S.C.



   
                                            By: /s/ James A. Feddersen      
                                                ----------------------------- 
                                                James A. Feddersen
    

<PAGE>   1
                                                                     EXHIBIT 5.2

             [MORRISON COHEN SINGER & WEINSTEIN, LLP LETTERHEAD]

                                    735-8600

                                 January 4, 1999

Aqua-Chem, Inc.
7800 North 113th Street
P.O. Box 421
Milwaukee, WI 53201

Re:      Form S-4 Registration Statement for Aqua-Chem, Inc.
         $125,000,000 11 1/4 % Senior Subordinated Notes Due 2008

Gentlemen:

           We have acted as special New York counsel to Aqua-Chem, Inc., a
Delaware corporation (the "Company" or "Registrant"), in connection with the
proposed issuance by the Company of up to $125,000,000 of its 11 1/4 % Senior
Subordinated Notes Due 2008 (the "Exchange Notes" or the "Securities") in an
exchange offer (the "Exchange Offer") for the Company's existing 11 1/4 % Senior
Subordinated Notes Due 2008 issued on June 23, 1998 (the "Existing Notes"), to
which Securities and Exchange Offer the Registration Statement referred to above
relates. Capitalized terms not otherwise defined herein shall have the meanings
assigned thereto in the Registration Statement.
     
           In that connection, we have examined originals, or copies certified
or otherwise identified to our satisfaction, of such documents as we have
deemed necessary or appropriate for the purposes of this opinion, including: (a)
the Certificate of Incorporation of the Registrant, as amended, (b) the By-Laws
of the Registrant, (c) resolutions adopted by the Board of Directors of the
Registrant on June 1, 1998, and by the Pricing Committee of the Board of
Directors of the Registrant dated June 18, 1998, (d) the Indenture, and (e) the
form of the Securities.
<PAGE>   2
           We have also examined such other documents, records, certificates and
agreements, and have made such legal and factual investigations,
as we have deemed necessary to enable us to render the opinions expressed
herein. As to the various matters of a factual nature forming the basis for our
opinions herein, we have relied, to the extent we deemed appropriate, upon
various representations made and information furnished to as by various
representatives of the Registrant.  We have assumed the authenticity of all
documents and instruments represented to us to be originals and the conformity
to originals of all documents and instruments represented to us to be copies of
originals.

         Based on the foregoing, and upon the assumptions, qualifications, and
exceptions set forth in this opinion letter, we are of the opinion that the
Securities being offered by the Registrant, when duly executed, authenticated,
issued and delivered against payment of the consideration therefor (consisting
of the exchange of a like amount of Existing Notes) as contemplated by the
Indenture, will be the valid, legal and binding obligations of the Company
enforceable against the Company in accordance with their terms.

           The opinion set forth in this opinion letter concerning the validity,
legally binding nature or enforceability of any provision of the Securities is
subject to (i) the application of bankruptcy, insolvency, avoidance, usury, bulk
transfer, reorganization, moratorium or other laws affecting the rights and
remedies of creditors, including, without limitation, any statutory or other law
regarding fraudulent conveyances and (ii) the application of equitable
principles and public policy considerations (including, without limitation,
principles of commercial reasonableness, good faith and fair dealing) regardless
of whether such principles and considerations are considered in a proceeding in
equity or at law.  

           We are admitted to practice in the state of New York, and we express
no opinion as to matters involving the application of laws other than the laws
of the State of New York, the corporate laws of the State of Delaware or the
federal laws of the United States.  

           This opinion letter is based upon currently existing laws statutes,
rules, ordinances and regulations and judicial decisions, and is rendered as of
the date hereof. We disclaim any obligation to advise you of any changes of any
of these sources of law or subsequent developments in law or changes in facts or
circumstances which might affect any matters or opinions

                                       2
<PAGE>   3
set forth in this opinion letter. Please note that we are opining only as to the
matters expressly set forth in this opinion letter, and no opinion should be
inferred as to any other matters.

           This opinion is being furnished to you solely for your benefit and
for purposes of compliance with applicable requirements in connection with the
preparation and filing of the Registration Statement. This opinion may not be
used for any other purpose, or furnished to, quoted to or relied upon by any
other person or entity without our prior written consent.

           We consent to the filing of this opinion as an exhibit to the
above-referenced Registration Statement and any amendments thereto (including
post-effective amendments) and to the reference to this firm and to this opinion
under the caption "LEGAL MATTERS" in the Prospectus which forms a part of the
Registration Statement.  

                                           Very truly yours,

                                           /s/     Morrison Cohen Singer &
                                                   Weinstein, LLP

                                          Morrison Cohen Singer & Weinstein, 
                                          LLP






                                       3

<PAGE>   1
 
   
                             LETTER OF TRANSMITTAL
    
 
                                AQUA-CHEM, INC.
                           OFFER FOR ALL OUTSTANDING
                   11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
                                IN EXCHANGE FOR
                   11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
                        WHICH HAVE BEEN REGISTERED UNDER
                     THE SECURITIES ACT OF 1933, AS AMENDED
   
                PURSUANT TO THE PROSPECTUS DATED JANUARY 5, 1999
    
 
AQUA-CHEM, INC. WILL ACCEPT ALL EXISTING NOTES (AS HEREINAFTER DEFINED) TENDERED
AND NOT WITHDRAWN PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON FEBRUARY 5, 1999
UNLESS EXTENDED (THE "EXPIRATION DATE"). TENDERS MAY BE WITHDRAWN AT ANY TIME
PRIOR TO 5:00 P.M. NEW YORK CITY TIME ON THE EXPIRATION DATE.
                             THE EXCHANGE AGENT IS:
                UNITED STATES TRUST COMPANY OF NEW YORK ("USTC")
 
<TABLE>
<CAPTION>
          By Mail:             Facsimile Transmission Number:    By Hand up to 4:30 p.m.:
          --------             ------------------------------    ------------------------
<S>                            <C>                             <C>
     United States Trust              (212) 780-0592                United States Trust
     Company of New York               (For Eligible                Company of New York
        P.O. Box 844                Institutions Only)                 111 Broadway
       Cooper Station                                                   Lower Level
New York, New York 10276-0844      Confirm by Telephone:         New York, New York 10006
    Attn: Corporate Trust                                          Attn: Corporate Trust
          Services                    (800) 548-6565                     Services
  (Registered or Certified
      Mail Recommended)
</TABLE>
 
<TABLE>
<CAPTION>
                                 By Overnight Courier and
                                by Hand after 4:30 p.m. on
                                 the Expiration Date Only:
                                --------------------------
<S>                            <C>                            <C>
                                    United States Trust
                                    Company of New York
                                       770 Broadway
                                        13th Floor
                                 New York, New York 10003
                                   Attn: Corporate Trust
                                         Services
</TABLE>
 
     DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET
FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER THAN
THE ONE LISTED ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. THE INSTRUCTIONS SET
FORTH IN THIS LETTER OF TRANSMITTAL SHOULD BE READ CAREFULLY BEFORE THIS LETTER
OF TRANSMITTAL IS COMPLETED.
<PAGE>   2
 
   
     The undersigned acknowledges receipt of the Prospectus dated January 5,
1999 (the "Prospectus") of Aqua-Chem, Inc., a Delaware corporation ("Aqua-Chem"
or the "Company"), and this Letter of Transmittal (the "Letter of Transmittal"),
that together constitute the Company's offer (the "Exchange Offer") to exchange
an aggregate of up to $125,000,000 principal amount of its 11 1/4% Senior
Subordinated Notes due 2008 which have been registered under the Securities Act
of 1933, as amended ("Exchange Notes") for a like principal amount of its issued
and outstanding 11 1/4% Senior Subordinated Notes due 2008 (the "Existing
Notes"). Recipients of a Prospectus should read the requirements described in
such Prospectus with respect to eligibility to participate in the Exchange
Offer. Capitalized terms used but not defined herein have the meanings ascribed
to them in the Prospectus.
    
 
     The Letter of Transmittal is to be completed by a holder of Existing Notes
in order to tender Existing Notes. Certificates representing Existing Notes must
be forwarded with this Letter of Transmittal, unless tender of Existing Notes is
made (i) by book-entry transfer pursuant to the procedures set forth in the
Prospectus under the caption "The Exchange Offer -- How to Tender" and
"-- Exchanging Book-Entry Notes" or (ii) according to the guaranteed delivery
procedures set forth under the caption "The Exchange Offer -- How to Tender" in
the Prospectus; in any case, instructions may be transmitted through the
Automated Tender Offer Program ("ATOP") of the Depository Trust Company ("DTC"
or the "Book-Entry Transfer Facility").
 
     Holders of Existing Notes that are tendering by book-entry transfer to the
Exchange Agent's account at DTC can execute the tender through ATOP for which
the transaction will be eligible. DTC participants that are accepting the
Exchange Offer must transmit their acceptances to DTC which will verify the
acceptance and execute a book-entry delivery to the Exchange Agent's account at
DTC. DTC will then send an Agent's Message to the Exchange Agent for its
acceptance. Delivery of the Agent's Message by DTC will satisfy the terms of the
Exchange Offer as to execution and delivery of a Letter of Transmittal by the
participant identified in the Agent's Message. DTC participants may also tender
their Existing Notes by submitting a Notice of Guaranteed Delivery through ATOP.
 
     Any beneficial owner whose Existing Notes are registered the name of a
broker, dealer, commercial bank, trust company or other nominee and who wishes
to tender should contact such holder of Existing Notes promptly and instruct
such holder of Existing Notes to tender on behalf of the beneficial owner. If
such beneficial owner wishes to tender on his own behalf, such beneficial owner
must, prior to completing and executing this Letter of Transmittal and
delivering his Existing Notes, either make appropriate arrangements to transfer
record ownership of the Existing Notes in such beneficial owner's name or obtain
a properly completed bond power from the record holder of Existing Notes. The
transfer of record ownership may take considerable time.
 
     In order to properly complete this Letter of Transmittal, a holder of
Existing Notes must (i) complete the box entitled "Description of Existing
Notes"; (ii) if appropriate, check and complete the boxes relating to book-entry
transfer, guaranteed delivery, Special Issuance Instructions and Special
Delivery Instructions; (iii) sign the Letter of Transmittal by completing the
box entitled "Sign Here"; and (iv) complete the Substitute Form W-9. Each holder
of Existing Notes should carefully read the detailed instructions below prior to
completing the Letter of Transmittal.
 
     Holders of Existing Notes who desire to tender the Existing Notes for
exchange and (i) whose Existing Notes are not immediately available; (ii) who
cannot deliver their Existing Notes and all other documents required hereby to
the Exchange Agent on or prior to the Expiration Date; or (iii) who are unable
to complete the procedure for book-entry transfer on a timely basis, must tender
the Existing Notes pursuant to the guaranteed delivery procedures set forth
below. See Instruction 2.
 
     Holders of Existing Notes who wish to tender their Existing Notes for
exchange must, at a minimum, complete columns (1) through (3) in the box below
entitled "Description of Existing Notes" and sign the box below entitled "Sign
Here." If only these columns are completed, such holder of Existing Notes will
have tendered for exchange all Existing Notes listed in column (3) below. If the
holder of the Existing Notes wishes to tender for exchange less than all of such
Existing Notes, column (4) must be completed in full. In such case, such holder
of Existing Notes should refer to Instruction 5.
                                        2
<PAGE>   3
 
<TABLE>
  <S>                                                    <C>                  <C>                  <C>
  ---------------------------------------------------------------------------------------------------------------------
                                              DESCRIPTION OF EXISTING NOTES
  ---------------------------------------------------------------------------------------------------------------------
                           (1)                                   (2)                  (3)                  (4)
  ---------------------------------------------------------------------------------------------------------------------
                                                                                                     PRINCIPAL AMOUNT
                                                             CERTIFICATE      AGGREGATE PRINCIPAL      TENDERED FOR
  NAME(S) AND ADDRESS(ES) OF REGISTERED NOTE HOLDER(S),     NUMBER(S)(1)      AMOUNT REPRESENTED    EXCHANGE (ONLY IF
              EXACTLY AS NAME(S) APPEAR(S)                 (ATTACH SIGNED             BY           DIFFERENT FROM COL.
                 ON NOTE CERTIFICATE(S)                  LIST, IF NECESSARY)  SUCH CERTIFICATE(S)        (3))(2)
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
  ---------------------------------------------------------------------------------------------------------------------
                  TOTAL PRINCIPAL AMOUNT OF EXISTING NOTES:
  ---------------------------------------------------------------------------------------------------------------------
    (1) Column (2) need not be completed by holders of Existing Notes tendering Existing Notes for exchange by
        book-entry transfer. Please check the appropriate box below and provide the requested information.
    (2) The minimum permitted tender is $1,000 in principal amount of Existing Notes. All other tenders must be in
        integral multiples of $1,000 of principal amount. Column (4) need not be completed by holders of Existing Notes
        who wish to tender for exchange the principal amount of Existing Notes listed in Column (3). Completion of
        Column (4) will indicate that the holder of Existing Notes wishes to tender for exchange only the principal
        amount of Existing Notes indicated in Column (4).
  ---------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                        3
<PAGE>   4
 
                            TENDER OF EXISTING NOTES
- --------------------------------------------------------------------------------
 
[ ] CHECK HERE IF TENDERED EXISTING NOTES ARE DELIVERED HEREWITH.
 
[ ] CHECK HERE IF TENDERED EXISTING NOTES ARE BEING DELIVERED BY BOOK-ENTRY
    TRANSFER MADE TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH USTC AND
    COMPLETE THE FOLLOWING (FOR USE BY ELIGIBLE GUARANTOR INSTITUTIONS (AS
    HEREINAFTER DEFINED) ONLY).
 
    Name of Tendering Institution:
                                  ----------------------------------------------
 
    Account Number:
                   -------------------------------------------------------------
 
    Transaction Code Number:
                            ------------------------------
 
    By crediting the Existing Notes to the Exchange Agent's account at USTC in
    accordance with USTC's procedures with respect to the Exchange Offer,
    including transmitting a computer-generated message (an "Agent's Message")
    to the Exchange Agent in which the holder of the Existing Notes acknowledges
    and agrees to be bound by the terms of this Letter of Transmittal and
    confirms on behalf of itself and the beneficial owners of such Existing
    Notes all provisions of this Letter of Transmittal applicable to it and such
    beneficial owners as fully as if it had completed the information required
    herein and executed and transmitted this Letter of Transmittal to the
    Exchange Agent.
 
[ ] CHECK HERE IF TENDERED EXISTING NOTES ARE BEING DELIVERED PURSUANT TO A
    NOTICE OF GUARANTEED DELIVERY ENCLOSED HEREWITH AND COMPLETE THE FOLLOWING
    (FOR USE BY ELIGIBLE GUARANTOR INSTITUTIONS (AS HEREINAFTER DEFINED) ONLY):
 
    Name of Registered Holder of Existing Note(s):
                                                  ------------------------------
 
    Date of Execution of Notice of Guaranteed Delivery:
                                                       -------------------------
 
    Window Ticket Number (if available):
                                        ----------------------------------------
 
    Name of Institution Which Guaranteed Delivery:
                                                  ------------------------------
 
    Account Number (if delivered by book-entry transfer):
                                                         -----------------------
 
[ ] CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
    COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
    THERETO.
 
    Name:
         -----------------------------------------------------------------------
 
    Address:
            --------------------------------------------------------------------
 
[ ] CHECK HERE IF THE BENEFICIAL OWNER OF THE EXISTING NOTES IS A PARTICIPATING
    BROKER-DEALER AND SUCH PARTICIPATING BROKER-DEALER ACQUIRED THE EXISTING
    NOTES FOR ITS OWN ACCOUNT AS A RESULT OF MARKET-MAKING ACTIVITIES OR OTHER
    TRADING ACTIVITIES.
 
                                        4
<PAGE>   5
 
                       SIGNATURES MUST BE PROVIDED BELOW
 
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
 
Ladies and Gentlemen:
 
   
     Pursuant to the offer by Aqua-Chem, Inc. (the "Company") upon the terms and
conditions set forth in the Prospectus dated January 5, 1999 (the "Prospectus")
of the Company and this Letter of Transmittal (the "Letter of Transmittal"),
that together constitute the Company's offer (the "Exchange Offer") to exchange
an aggregate of up to $125,000,000 principal amount of its 11 1/4% Senior
Subordinated Notes due 2008 which have been registered under the Securities Act
of 1933, as amended ("Exchange Notes") for a like principal amount of its issued
and outstanding 11 1/4% Senior Subordinated Notes due 2008 (the "Existing
Notes"), the undersigned hereby tenders to the Company for exchange the Existing
Notes identified above (hereinafter the "Tendered Existing Notes").
    
 
     Subject to, and effective upon, the acceptance for exchange of the Tendered
Existing Notes, the undersigned hereby exchanges, assigns, and transfers to, or
upon the order of, the Company, all right, title, and interest in, to, and under
the Tendered Existing Notes.
 
     Unless otherwise indicated under "Special Issuance Instructions," above,
please issue the Exchange Notes exchanged for Tendered Existing Notes in the
name(s) of the undersigned. Similarly, unless otherwise indicated under "Special
Delivery Instructions," above, please send or cause to be sent the certificates
for the Exchange Notes (and accompanying documents, as appropriate) to the
undersigned at the address shown below.
 
     The undersigned understands that tenders of Existing Notes pursuant to the
procedures described under the caption "The Exchange Offer" in the Prospectus
and in the instructions hereto will constitute a binding agreement between the
undersigned and the Company upon the terms and subject to the conditions of the
Exchange Offer, subject only to withdrawal of such tenders on the terms set
forth in the Prospectus under the caption "The Exchange Offer -- Withdrawal
Rights." All authority herein conferred or agreed to be conferred shall survive
the death or incapacity of the undersigned and any obligation of the undersigned
or any Beneficial Owners hereunder shall be binding upon the heirs,
representatives, successors, and assigns of the undersigned and such Beneficial
Owner(s). The undersigned hereby irrevocably constitutes and appoints the
Exchange Agent as the true and lawful agent and attorney in fact of the
undersigned with respect to the Tendered Existing Notes, with full power of
substitution (such power of attorney being deemed to be an irrevocable power
coupled with an interest), to (i) deliver the Tendered Existing Notes to the
Company or cause ownership of the Tendered Existing Notes to be transferred to,
or upon the order of, the Company, on the books of the registrar for the
Existing Notes and deliver all accompanying evidences of transfer and
authenticity to, or upon the order of, the Company upon receipt by the Exchange
Agent, as the undersigned's agent, of the Exchange Notes to which the
undersigned is entitled upon acceptance by the Company of the Tendered Existing
Notes pursuant to the Exchange Offer, and (ii) receive all benefits and
otherwise exercise all rights of beneficial ownership of the Tendered Existing
Notes, all in accordance with the terms of the Exchange Offer.
 
     The undersigned hereby represents and warrants that (i) the undersigned is
the registered owner of all the Tendered Existing Notes; (ii) it has received
from each beneficial owner of the Tendered Existing Notes ("Beneficial Owner") a
duly completed and executed form of "Instruction to Registered Holder and/or
Book-Entry Transfer Facility Participant from Beneficial Owner" accompanying
this Letter of Transmittal, instructing the undersigned to take the action
described in this Letter of Transmittal; and (iii) the undersigned has full
power and authority to tender, exchange, assign, and transfer the Tendered
Existing Notes and the Company will acquire good and unencumbered title thereto,
free and clear of all liens, restrictions, charges, encumbrances, and adverse
claims when the Tendered Existing Notes are acquired by the Company as
contemplated herein. The undersigned and each Beneficial Owner will, upon
request, execute and deliver any additional documents reasonably requested by
the Company or the Exchange Agent as necessary or desirable to complete and give
effect to the transactions contemplated hereby.
 
                                        5
<PAGE>   6
 
     The undersigned hereby represents and warrants that the information set
forth above under "DESCRIPTION OF EXISTING NOTES" is true and correct.
 
     By accepting the Exchange Offer, the undersigned hereby represents and
warrants that (i) the Exchange Notes to be acquired by the undersigned and any
Beneficial Owner(s) in connection with the Exchange Offer are being acquired by
the undersigned and any Beneficial Owner(s) in the ordinary course of business
of the undersigned and any Beneficial Owner(s); (ii) the undersigned and any
Beneficial Owner(s) are not participating, do not intend to participate, and
have no arrangement or understanding with any person to participate, in the
distribution of the Exchange Notes; (iii) except as otherwise disclosed in
writing herewith, neither the undersigned nor any Beneficial Owner is an
"affiliate," as defined in Rule 405 under the Securities Act, of the Company;
and (iv) the undersigned and any Beneficial Owner(s) acknowledge and agree that
any person participating in the Exchange Offer with the intention or for the
purpose of distributing the Exchange Notes must comply with the registration and
prospectus delivery requirements of the Securities Act in connection with a
secondary resale of the Exchange Notes acquired by such person and cannot rely
on the position of the Staff of the Securities and Exchange Commission (the
"Commission") set forth in the no-action letters that are discussed in the
section of the Prospectus entitled "The Exchange Offer." In addition, by
accepting the Exchange Offer, the undersigned hereby (a) represents and warrants
that, if the undersigned or any Beneficial Owner of the Existing Notes is a
Participating Broker-Dealer, such Participating Broker-Dealer acquired the
Existing Notes for its own account as a result of market-making activities or
other trading activities and has not entered into any arrangement or
understanding with any person to distribute the Exchange Notes to be received in
the Exchange Offer; and (b) acknowledges that, by receiving Exchange Notes for
its own account in exchange for Existing Notes, where such Existing Notes were
acquired as a result of market-making activities or other trading activities,
such Participating Broker-Dealer will deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale of such
Exchange Notes.
 
                                        6
<PAGE>   7
 
                                PLEASE SIGN HERE
          (TO BE COMPLETED BY ALL TENDERING HOLDERS OF EXISTING NOTES
 REGARDLESS OF WHETHER EXISTING NOTES ARE BEING PHYSICALLY DELIVERED HEREWITH)
 
X
- --------------------------------------------------------------------------------
X
- --------------------------------------------------------------------------------
Date:
- -------------------------------------------------
 
     Must be signed by the registered holder(s) of Existing Notes exactly as
name(s) appear(s) on certificate(s) representing Existing Notes or on a security
position listing or by person(s) authorized to become registered holder(s) by
certificates and documents transmitted with this Letter of Transmittal. If
signature is by a trustee, executor, administrator, guardian, attorney-in-fact,
officer, or other person acting in a fiduciary or representative capacity, such
person must set forth his or her full title below (see Instruction 6).
 
Name(s)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                                 (Please Print)
 
Capacity (full title)
- --------------------------------------------------------------------------------
Address
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                           (Include Zip/Postal Code)
 
Area Code and Telephone No. (
- ---------)
- --------------------------------------------------------------------
Tax Identification or Social Security Number
- ----------------------------------------------------------------
                                         Please complete Substitute Form W-9
 
                         MEDALLION SIGNATURE GUARANTEE
         (SIGNATURE(S) MUST BE GUARANTEED IF REQUIRED BY INSTRUCTION 1)
 
Authorized Signature
- --------------------------------------------------------------------------------
Dated
- ------------------------------------------------
Name and Title
- --------------------------------------------------------------------------------
                                 (Please Print)
 
Name of Firm
- --------------------------------------------------------------------------------
                               (PLACE SEAL HERE)
 
                                        7
<PAGE>   8
 
     Unless otherwise indicated below under "Special Issuance Instructions" or
"Special Delivery Instructions," the undersigned hereby request(s) that any
Notes representing principal amounts not tendered or not accepted for purchase
be issued in the name(s) of, and delivered to, the undersigned (and in the case
of Notes tendered by book-entry transfer, by credit to the account of DTC).
 
     In the event that the "Special Issuance Instructions" or "Special Delivery
Instructions" box is completed, the undersigned hereby request(s) that any Notes
representing principal amounts not tendered or not accepted for purchase be
issued in the name(s) of, and be delivered to, the person(s) at the address(es)
therein indicated.
 
                         SPECIAL ISSUANCE INSTRUCTIONS
                           (SEE INSTRUCTIONS 1 AND 8)
To be completed ONLY (i) if (a) Exchange Notes issued in exchange for Existing
Notes or (b) certificates for Existing Notes in a principal amount not exchanged
for Exchange Notes are to be issued in the name of someone other than the
undersigned, or (ii) if Existing Notes tendered by book-entry transfer which are
not exchanged are to be returned by credit to an account maintained at the
Book-Entry Transfer Facility.
 
Issue: [ ]
Name:
- -----------------------------------------------
                                 (Please Print)
 
Address:
- ---------------------------------------------
 
- -------------------------------------------------------
 
- -------------------------------------------------------
                           (Include Zip/Postal Code)
 
- -------------------------------------------------------
              (Taxpayer Identification or Social Security Number)
 
[ ] Credit Existing Notes not exchanged and delivered by book-entry transfer to
    the account set forth below:
 
- -------------------------------------------------------
                 (Book-Entry Transfer Facility Account Number)
 
                         SPECIAL DELIVERY INSTRUCTIONS
                           (SEE INSTRUCTIONS 1 AND 8)
To be completed ONLY if certificates for Existing Notes in a principal amount
not exchanged for Exchange Notes are to be mailed or delivered to someone other
than the undersigned, or to the undersigned at an address other than the address
shown below the undersigned's signature.
 
Mail or deliver to:
Name:
- -----------------------------------------------
                                 (Please Print)
 
Address:
- ---------------------------------------------
 
- -------------------------------------------------------
 
- -------------------------------------------------------
                           (Include Zip/Postal Code)
 
- -------------------------------------------------------
              (Taxpayer Identification or Social Security Number)
 
                                        8
<PAGE>   9
 
                     INSTRUCTIONS TO LETTER OF TRANSMITTAL
 
         FORMING PART OF THE TERMS AND CONDITIONS OF THE EXCHANGE OFFER
 
                                  INSTRUCTIONS
 
         FORMING PART OF THE TERMS AND CONDITIONS OF THE EXCHANGE OFFER
 
     1. GUARANTEE OF SIGNATURE. Except as otherwise provided below, all
signatures on the Letter of Transmittal must be guaranteed by, if the holder is
resident in the United States, an eligible institution that is a member of one
of the following recognized signature Guarantee Programs:
 
     (a) The Securities Transfer Agents Medallion Program (STAMP);
 
     (b) The New York Stock Exchange Medallion Signature Program (MSP); or
 
     (c) The Stock Exchange Medallion Program (SEMP).
 
     Signatures on this Letter of Transmittal need not be guaranteed (i) if this
Letter of Transmittal is signed by the registered holder(s) of the Existing
Notes tendered herewith and such registered holder(s) have not completed the box
entitled "Special Issuance Instruction" or the box entitled "Special Delivery
Instructions" on this Letter of Transmittal or (ii) if such Existing Notes are
tendered for the account of an Eligible Guarantor Institution. IN ALL OTHER
CASES, ALL SIGNATURES MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION.
 
     2. DELIVERY OF THIS LETTER OF TRANSMITTAL AND EXISTING NOTES; GUARANTEED
DELIVERY PROCEDURE. This Letter of Transmittal is to be completed by holders of
Existing Notes (i) if certificates are to be forwarded herewith or (ii) if
tenders are to be made pursuant to the procedures for tender by book-entry
transfer or guaranteed delivery set forth in the section of the Prospectus
entitled "The Exchange Offer -- How to Tender." Certificates for all physically
tendered Existing Notes or any confirmation of a book-entry transfer under DTC's
ATOP (a "Book-Entry Confirmation"), as well as a properly completed and duly
executed copy of this Letter of Transmittal or facsimile hereof, and any other
documents required by this Letter of Transmittal must be received by the
Exchange Agent at its address set forth on the cover of this Letter of
Transmittal prior to 5:00 p.m., New York City time, on the Expiration Date.
Holders of Existing Notes who elect to tender Existing Notes and (i) whose
Existing Notes are not immediately available, (ii) who cannot deliver the
Existing Notes or other required documents to the Exchange Agent prior to 5:00
p.m., New York City time on the Expiration Date or (iii) who are unable to
complete the procedure for book-entry transfer on a timely basis, may have such
tender effected if: (a) such tender is made by or through an Eligible Guarantor
Institution; (b) prior to 5:00 p.m., New York City time, on the Expiration Date,
the Exchange Agent has received from such holder or Eligible Guarantor
Institution a properly completed and duly executed Letter of Transmittal (or a
facsimile thereof) and Notice of Guaranteed Delivery, or an Agent's Message with
respect to guaranteed delivery that is accepted by the Company, either by hand
delivery, mail, telegram or facsimile transmission setting forth the name and
address of the holder of such Existing Notes, the certificate number(s) of such
Existing Notes and the principal amount at maturity of Existing Notes tendered
for exchange, stating that tender is being made thereby and guaranteeing that,
within three (3) New York Stock Exchange ("NYSE") trading days after the date of
delivery of the Notice of Guaranteed Delivery, the certificates representing
such Existing Notes (or a Book-Entry Confirmation), in proper form for transfer,
and any other documents required by this Letter of Transmittal, will be
deposited by such Eligible Guarantor Institution with the Exchange Agent; and
(c) certificates for all tendered Existing Notes, or a Book-Entry Confirmation,
together with a copy of the previously executed Letter of Transmittal (or
facsimile thereof) and any other documents required by this Letter of
Transmittal are received by the Exchange Agent within three (3) NYSE trading
days after the Expiration Date.
 
     THE METHOD OF DELIVERY OF EXISTING NOTES, THIS LETTER OF TRANSMITTAL AND
ALL OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE TENDERING HOLDER
OF EXISTING NOTES. EXCEPT AS OTHERWISE PROVIDED BELOW, THE DELIVERY WILL BE
DEEMED MADE ONLY WHEN ACTUALLY RECEIVED OR CONFIRMED BY THE EXCHANGE AGENT. IF
DELIVERY IS BY MAIL, PROPERLY INSURED
                                        9
<PAGE>   10
 
REGISTERED MAIL WITH RETURN RECEIPT REQUESTED IS RECOMMENDED. SUFFICIENT TIME
SHOULD BE ALLOWED FOR SUCH DOCUMENTS TO REACH THE EXCHANGE AGENT. NEITHER THE
LETTER OF TRANSMITTAL NOR ANY EXISTING NOTES SHOULD BE SENT TO THE COMPANY.
 
     No alternative, conditional or contingent tenders will be accepted. By
execution of this Letter of Transmittal (or facsimile hereof, if applicable),
all tendering holders of Existing Notes waive any right to receive notice of the
acceptance of their Existing Notes for exchange.
 
     3. INADEQUATE SPACE. If the space provided in the box entitled "DESCRIPTION
OF EXISTING NOTES" above is inadequate, the certificate numbers and principal
amounts at maturity of the Existing Notes being tendered should be listed on a
separate signed schedule affixed hereto.
 
     4. WITHDRAWALS. A tender of Existing Notes may be withdrawn at any time
prior to 5:00 p.m., New York City time, on the Expiration Date by delivery of
written notice of withdrawal to the Exchange Agent at the address set forth on
the cover of this Letter of Transmittal. To be effective, a notice of withdrawal
of Existing Notes must (i) specify the name of the person who tendered the
Existing Notes to be withdrawn (the "Depositor"); (ii) identify the Existing
Notes to be withdrawn (including the certificate number or numbers and aggregate
principal amount at maturity of such Existing Notes); (iii) be signed by the
holder of Existing Notes in the same manner as the original signature on the
Letter of Transmittal by which such Existing Notes were tendered (including any
required signature guarantees) or be accompanied by documents of transfer
sufficient to have the applicable transfer agent register the transfer of such
Existing Notes into the name of the person withdrawing the tender; and (iv)
specify the name in which any such Existing Notes are to be registered, if
different from that of the Depositor. Withdrawals of tenders of Existing Notes
may not be rescinded, and any Existing Notes withdrawn will thereafter be deemed
not validly tendered for purposes of the Exchange Offer and no Exchange Notes
will be issued with respect thereto unless the Existing Notes so withdrawn are
validly retendered. Properly withdrawn Existing Notes may be retendered by
following one of the procedures described in the section of the Prospectus
entitled "The Exchange Offer -- How to Tender" at any time prior to 5:00 p.m.,
New York City time, on the Expiration Date.
 
     5. PARTIAL TENDERS. (Not applicable to holders of Existing Notes who tender
Existing Notes by book-entry transfer.) Tenders of Existing Notes will be
accepted only in integral multiples of US $1,000 principal amount at maturity,
and only if the remaining untendered portion of such Existing Notes held by the
tendering holder is in a principal amount of $250,000, or any integral multiple
of $1,000 in excess of such amount. If a tender for exchange is to be made with
respect to less than the entire principal amount at maturity of any Existing
Notes, fill in the principal amount at maturity of Existing Notes that are
tendered for exchange in Column (4) of the box entitled "DESCRIPTION OF EXISTING
NOTES," as more fully described in the footnotes thereto. In case of a partial
tender for exchange, a new certificate, in fully registered form, for the
remainder of the principal amount at maturity of the Existing Notes, will be
sent to the holders of Existing Notes unless otherwise indicated in the
appropriate box on this Letter of Transmittal as promptly as practicable after
the expiration or termination of the Exchange Offer.
 
     6. SIGNATURES ON THIS LETTER OF TRANSMITTAL, POWERS OF ATTORNEY AND
ENDORSEMENTS.
 
          (a) The signature(s) of the holder of Existing Note(s) on this Letter
     of Transmittal must correspond with the name(s) as written on the face of
     the Existing Notes without alteration, enlargement or any change
     whatsoever.
 
          (b) If tendered Existing Notes are owned by record by two or more
     joint owners, all such owners must sign this Letter of Transmittal.
 
          (c) If any tendered Existing Notes are registered in different names,
     on several certificates, it will be necessary to complete, sign and submit
     as many separate copies of this Letter of Transmittal and any necessary or
     required documents as there are different registrations or certificates.
 
          (d) When this Letter of Transmittal is signed by the holder of the
     Existing Notes listed and transmitted hereby, no endorsements of Existing
     Notes or separate powers of attorney are required. If, however, Existing
     Notes not tendered or not accepted, are to be issued or returned in the
     name of a
                                       10
<PAGE>   11
 
     person other than the holder of such Existing Notes, then the Existing
     Notes transmitted hereby must be endorsed or accompanied by appropriate
     powers of attorney in a form satisfactory to the Company, in either case
     signed exactly as the name(s) of the holder of Existing Notes appear(s) on
     the Existing Notes. Signatures on such Existing Notes or powers of attorney
     must be guaranteed by an Eligible Guarantor Institution (unless signed by
     an Eligible Guarantor institution).
 
          (e) If this Letter of Transmittal or an Existing Note or power of
     attorney is signed by a trustee, executor, administrator, guardian,
     attorney-in-fact, officer of a corporation or other person acting in a
     fiduciary or representative capacity, such person should so indicate when
     signing, and proper evidence satisfactory to the Company of their authority
     so to act must be submitted.
 
          (f) If this Letter of Transmittal is signed by a person other than the
     registered holder of Existing Notes listed, the Existing Notes must be
     endorsed or accompanied by appropriate powers of attorney, in either case
     signed exactly as the name(s) of the registered holder of Existing Notes
     appear(s) on the certificates. Signatures on such Existing Notes or powers
     of attorney must be guaranteed by an Eligible Guarantor Institution (unless
     signed by an Eligible Guarantor Institution).
 
     7. TRANSFER TAXES. Except as set forth in this Instruction 7, the Company
will pay all transfer taxes, if any, applicable to the transfer and exchange of
Existing Notes pursuant to the Exchange Offer. If, however, issuance of Exchange
Notes is to be made to, or Existing Notes not tendered for exchange are to be
issued or returned in the name of, any person other than the holder of Existing
Notes, the amount of any transfer taxes payable on account of the transfer to
such person will be imposed on and payable by the holder of Existing Notes
tendering Existing Notes for exchange prior to the issuance of the Exchange
Notes. If satisfactory evidence of payment of such taxes or exemption therefrom
is not submitted with the Letter of Transmittal, the amount of such transfer
taxes will be billed directly to such tendering holder.
 
     8. SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS. If the Exchange Notes are to
be issued, or if any Existing Notes not tendered for exchange are to be issued
or sent, to someone other than the holder of Existing Notes or to an address
other than that shown above, the appropriate boxes on this Letter of Transmittal
should be completed. Holders of Existing Notes tendering Existing Notes by
book-entry transfer may request that Existing Notes not accepted be credited to
such account maintained at DTC as such holder of Existing Notes may designate.
 
     9. IRREGULARITIES. All questions as to the form of documents and the
validity, eligibility (including time or receipt), acceptance and withdrawal of
Existing Notes will be determined by the Company, in its sole discretion, whose
determination shall be final and binding. The Company reserves the absolute
right to reject any or all tenders for exchange of any particular Existing Notes
that are not in proper form, or the acceptance of which would, in the opinion of
the Company or its counsel, be unlawful. The Company reserves the absolute right
to waive any defect, irregularity or condition of tender for exchange with
regard to any particular Existing Notes. The Company's interpretation of the
terms of, and conditions to, the Exchange Offer (including the instructions
herein) will be final and binding. Unless waived, any defect or irregularities
in connection with the Exchange Offer must be cured within such time as the
Company shall determine. Neither the Company, the Exchange Agent nor any other
person shall be under any duty to give notice of any defects or irregularities
in Existing Notes tendered for exchange, nor shall any of them incur any
liability for failure to give such notice. A tender of Existing Notes will not
be deemed to have been made until all defects and irregularities with respect to
such tender have been cured or waived. Any Existing Notes received by the
Exchange Agent that are not properly tendered and as to which the defects or
irregularities have not been cured or waived will be returned by the Exchange
Agent to the tendering holders, unless otherwise provided in this Letter of
Transmittal as soon as practicable following the Expiration Date.
 
     10. WAIVER OF CONDITIONS. The Company reserves the absolute right to waive
certain of the specified conditions as described under "The Exchange Offer --
Conditions" in the Prospectus in the case of any Existing Notes tendered (except
as otherwise provided in the Prospectus).
 
     11. MUTILATED, LOST, STOLEN OR DESTROYED NOTES. If a holder of Existing
Notes desires to tender an Existing Note pursuant to the Exchange Offer, but the
Existing Note has been mutilated, lost, stolen or
 
                                       11
<PAGE>   12
 
destroyed, such holder of Existing Notes should write to or telephone the
Trustee, at the address listed below, concerning the procedures for obtaining
replacement certificates for such Existing Notes, arranging for indemnification
or any other matter that requires handling by the Trustee:
 
              United States Trust Company of New York
              770 Broadway
              New York, NY 10003
              Corporate Trust Department
              Telephone: (800) 548-6565
              Facsimile: (212) 780-0592
 
     12. REQUESTS FOR INFORMATION OR ADDITIONAL COPIES. Requests for information
or for additional copies of the Prospectus and this Letter of Transmittal may be
directed to the Exchange Agent at the address or telephone number set forth on
the cover of this Letter of Transmittal.
 
     13. SUBSTITUTE FORM W-9. Each tendering holder (or other payee) is required
to provide the Exchange Agent with a correct taxpayer identification number
("'TIN"), generally the holder's Social Security or federal employer
identification number, and with certain other information, on Substitute Form
W-9, which is provided under "Important Tax Information" below, and to certify
that the holder (or other payee) is not subject to backup withholding. Failure
to provide the information on the Substitute Form W-9 may subject the tendering
holder (or other payee) to a $50 penalty imposed by the Internal Revenue Service
and 31% federal income tax withholding on any payments made pursuant to the
Exchange Offer. The box in Part 3 of the Substitute Form W-9 may be checked if
the tendering holder (or other payee) has not been issued a TIN and has applied
for a TIN or intends to apply for a TIN in the near future. If the box in Part 3
is checked and the Exchange Agent is not provided with a TIN by the time of
payment, the Exchange Agent will withhold 31% on any payments made pursuant to
the Exchange Offer.
 
     IMPORTANT: THIS LETTER OF TRANSMITTAL (OR A FACSIMILE THEREOF, IF
APPLICABLE) TOGETHER WITH EXISTING NOTE CERTIFICATES, OR CONFIRMATION OF
BOOK-ENTRY TRANSFER OR THE NOTICE OF GUARANTEED DELIVERY, AND ALL OTHER REQUIRED
DOCUMENTS MUST BE RECEIVED BY THE EXCHANGE AGENT PRIOR TO 5:00 P.M., NEW YORK
CITY TIME, ON THE EXPIRATION DATE.
 
                                       12
<PAGE>   13
 
<TABLE>
<S>                             <C>                                           <C>                             <C>
- -----------------------------------------------------------------------------------------------------------------
                                       PAYER'S NAME:   AQUA-CHEM, INC.
- -----------------------------------------------------------------------------------------------------------------
  SUBSTITUTE                    PART I--PLEASE PROVIDE YOUR TIN IN THE BOX
                                AT THE RIGHT AND CERTIFY BY SIGNING AND       Social Security Number
                                DATING BELOW.
                                                                              OR
                                                                                 Employer Identification
                                                                                 Number
                                -----------------------------------------------------------------------------
 FORMW-9
 DEPARTMENT OF THE TREASURY     PART 2--CERTIFICATION--Under Penalties of Perjury, I certify that:
 INTERNAL REVENUE SERVICE
 PAYER'S REQUEST FOR            (1) The number shown on this form is my correct taxpayer identification
 TAXPAYER IDENTIFICATION        number (or I am waiting for a number to be issued to me), and
 NUMBER (TIN)
                                (2) I am not subject to backup withholding because: (a) I am exempt from
                                backup withholding, or (b) I have not been notified by the Internal Revenue
                                    Service (the "IRS") that I am subject to backup withholding as a result
                                    of a failure to report all interest or dividends, or (c) the IRS has
                                    notified me that I am no longer subject to backup withholding.
                                CERTIFICATE INSTRUCTIONS--You must cross out item (2) in Part 2 above if you
                                have been notified by the IRS that you are subject to backup withholding
                                because of under- reporting interest and dividends on your tax return.
                                However, if after being notified by the IRS that you were subject to backup
                                withholding you receive another notification from the IRS stating that you
                                are no longer subject to backup withholding, do not cross out item (2).
                                SIGNATURE   DATE __________________
                                -----------------------------------------------------------------------------
                                PART 3--AWAITING TIN [ ]
- -----------------------------------------------------------------------------------------------------------------
</TABLE>
 
   NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP
         WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE
         EXCHANGE OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR
         CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM
         W-9 FOR ADDITIONAL DETAILS.
 
         YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX
         IN PART 3 OF SUBSTITUTE FORM W-9
- --------------------------------------------------------------------------------
 
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
      I certify under penalties of perjury that a taxpayer identification
 number has not been issued to me, and either (a) I have mailed or delivered an
 application to receive a taxpayer identification number to the appropriate
 Internal Revenue Service Center or Social Security Administration Office or
 (b) I intend to mail or deliver such an application in the near future. I
 understand that if I do not provide a taxpayer identification number within
 sixty (60) days, 31% of all reportable payments made to me thereafter will be
 withheld until I provide such a number.
 
 Signature   Date ____________________
- --------------------------------------------------------------------------------
 
                                       13
<PAGE>   14
 
                           IMPORTANT TAX INFORMATION
 
     Under current United States federal income tax law, a holder of Existing
Notes whose tendered Existing Notes are accepted for exchange is required to
provide the Company (as payor), through the Exchange Agent, with such holder's
correct TIN on Substitute Form W-9 or otherwise establish a basis for exemption
from backup withholding. If such holder of Existing Notes is an individual, the
TIN is such holder's social security number. If the Exchange Agent is not
provided with the correct taxpayer identification number, the holder of Existing
Notes may be subject to a penalty imposed by the Internal Revenue Service. In
addition, delivery of such holder's Exchange Notes may be subject to backup
withholding.
 
     Certain holders of Existing Notes (including, among others, all
corporations and certain foreign individuals) are not subject to these backup
withholding and reporting requirements. Exempt holders of Existing Notes should
indicate their exempt status on Substitute Form W-9. A foreign individual may
qualify as an exempt recipient by submitting to the Exchange Agent a properly
completed Internal Revenue Service Form W-8 (which the Exchange Agent will
provide upon request) signed under penalty of perjury, attesting to the holder's
exempt status. See the enclosed Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9 for additional instructions.
 
     If backup withholding applies, the Company is required to withhold 31% of
any payment made to the holder of Existing Notes or other payee. Backup
withholding is not an additional federal income tax. Rather, the federal income
tax liability of persons subject to backup withholding will be reduced by the
amount of tax withheld. If withholding results in an overpayment of taxes, a
refund may be obtained from the Internal Revenue Service.
 
SUBSTITUTE FORM W-9; TAXPAYER IDENTIFICATION NUMBER
 
     To prevent backup withholding on payments that are made with respect to
Existing Notes exchanged in the Exchange Offer, each holder of Existing Notes is
required to provide the Exchange Agent with either (i) the holder's correct TIN
by completing the form above, certifying that the TIN provided on Substitute
Form W-9 is correct (or that such holder of Existing Notes is awaiting a TIN)
and that (A) the holder of Existing Notes has not been notified by the Internal
Revenue Service that he or she is subject to backup withholding as a result of a
failure to report all interest or dividends or (B) the Internal Revenue Service
has notified the holder of Existing Notes that he or she is no longer subject to
backup withholding; or (ii) an adequate basis for exemption (for example, in the
case of a Canadian resident holder, by submitting a completed Form W-8).
 
     The holder of Existing Notes is required to give the Exchange Agent the TIN
(e.g., social security number or employer identification number) of the record
owner of the Existing Notes. If the Existing Notes are held in more than one
name or are not held in the name of the actual owner, consult the enclosed
Guidelines for Certification of Taxpayer Identification Number on Substitute
Form W-9 for additional guidance regarding which number to report.
 
                                       14

<PAGE>   1
 
   
          INSTRUCTIONS TO REGISTERED HOLDER AND/OR BOOK-ENTRY TRANSFER
    
                   FACILITY PARTICIPANT FROM BENEFICIAL OWNER
                                       OF
 
                                AQUA-CHEM, INC.
                   11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
 
To Registered Holder and/or Participant of the Book-Entry Transfer Facility:
 
   
     The undersigned hereby acknowledges receipt of the Prospectus dated January
5, 1999 (the "Prospectus") of Aqua-Chem, Inc., a Delaware corporation (the
"Company"), and the accompanying Letter of Transmittal (the "Letter of
Transmittal"), that together constitute the Company's offer (the "Exchange
Offer"). Capitalized terms used but not defined herein have the meanings
ascribed to them in the Prospectus.
    
 
     This will instruct you, the registered holder and/or book-entry transfer
facility participant, as to action to be taken by you relating to the Exchange
Offer with respect to the 11 1/4% Senior Subordinated Notes Due 2008 (the
"Notes") held by you for the account of the undersigned.
 
     The aggregate face amount of the Notes held by you for the account of the
undersigned is
 
(fill in amount): $____________________
 
     With respect to the Exchange Offer, the undersigned hereby instructs you
(CHECK APPROPRIATE BOX):
 
     [ ] TO TENDER the following Notes held by you for the account of the
         undersigned (insert principal amount of Notes to be tendered, if any):
         $____________________
 
     [ ] NOT TO TENDER any Notes held by you for the account of the undersigned.
 
   
     If the undersigned instructs you to tender the Notes held by you for the
account of the undersigned, it is understood that you are authorized (a) to
make, on behalf of the undersigned (and the undersigned, by its signature below,
hereby makes to you), the representations and warranties contained in the Letter
of Transmittal that are to be made with respect to the undersigned as a
beneficial owner, including but not limited to the representations that (i) the
undersigned's principal residence is in the state of ____________________ (fill
in state), (ii) the undersigned is acquiring the Exchange Notes in the ordinary
course of business of the undersigned, (iii) the undersigned is not
participating, does not participate, and has no arrangement or understanding
with any person to participate in the distribution of the Exchange Notes, (iv)
the undersigned acknowledges that any person participating in the Exchange Offer
for the purpose of distributing the Exchange Notes must comply with the
registration and prospectus delivery requirements of the Securities Act of 1933,
as amended (the "Act"), in connection with a secondary resale transaction of the
Exchange Notes acquired by such person and cannot rely on the position of the
staff of the Securities and Exchange Commission set forth in no-action letters
that are discussed in the section of the Prospectus entitled "The Exchange
Offer -- Certain Effects of the Exchange Offer," and (v) the undersigned is not
an "affiliate," as defined in Rule 405 under the Act, of the Company; (b) to
agree, on behalf of the undersigned, as set forth in the Letter of Transmittal;
and (c) to take such other action as necessary under the Prospectus or the
Letter of Transmittal to effect the valid tender of such Notes.
    
<PAGE>   2
 
- --------------------------------------------------------------------------------
 
                                   SIGN HERE
 
[S]                              [C]
Name(s) of beneficial owner(s):  -----------------------------------------------
                                                                                
                                 -----------------------------------------------
Signature(s):                    X                                              
                                 -----------------------------------------------
                                 X                                              
                                 -----------------------------------------------
                                                                                
Name (please print):             -----------------------------------------------
                                                                                
Address:                         -----------------------------------------------
                                                                                
                                 -----------------------------------------------
                                                                                
Telephone number:                -----------------------------------------------
Taxpayer Identification or                                                      
Social Security Number:          -----------------------------------------------
                                                                                
Date:                            -----------------------------------------------
                                                                                
- --------------------------------------------------------------------------------
 
                                        2

<PAGE>   1
 
   
                         NOTICE OF GUARANTEED DELIVERY
    
                   11 1/4% SENIOR SUBORDINATED NOTES DUE 2008
                                       OF
 
                                AQUA-CHEM, INC.
   
                PURSUANT TO THE PROSPECTUS DATED JANUARY 5, 1999
    
 
   
     This form must be used by a holder of 11 1/4% Senior Subordinated Notes Due
2008 (the "Notes") of Aqua-Chem, Inc., a Delaware corporation (the "Company"),
who wishes to tender Notes to the Exchange Agent pursuant to the guaranteed
delivery procedures described under the caption "The Exchange Offer -- How to
Tender" in the Company's Prospectus dated January 5, 1999 (the "Prospectus") and
in Instruction 2 to the related Letter of Transmittal. Any holder who wishes to
tender Notes pursuant to such guaranteed delivery procedures must ensure that
the Exchange Agent receives this Notice of Guaranteed Delivery prior to the
Expiration Date of the Exchange Offer. Capitalized terms used but not defined
herein have the meanings ascribed to them in the Prospectus or the Letter of
Transmittal.
    
 
                 THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL
          EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON FEBRUARY 5, 1999
                    UNLESS EXTENDED (THE "EXPIRATION DATE").
 
                    UNITED STATES TRUST COMPANY OF NEW YORK
                             (THE "EXCHANGE AGENT")
 
<TABLE>
<CAPTION>
          By Mail:             Facsimile Transmission Number:    By Hand up to 4:30 p.m.:
          --------             ------------------------------    ------------------------
<S>                            <C>                             <C>
 United States Trust Company          (212) 780-0592            United States Trust Company
         of New York            (For Eligible Institutions              of New York
        P.O. Box 844                       Only)                       111 Broadway
       Cooper Station                                                   Lower Level
     New York, New York            Confirm by Telephone:         New York, New York 10006
         10276-0844                                                Attn: Corporate Trust
    Attn: Corporate Trust              (800)548-6565                     Services
          Services
(Registered or Certified Mail
        Recommended)
</TABLE>
 
<TABLE>
<CAPTION>
                                 By Overnight Courier and
                                by Hand after 4:30 p.m. on
                                 the Expiration Date Only:
                                --------------------------
<S>                            <C>                            <C>
                                United States Trust Company
                                            of
                                         New York
                                       770 Broadway
                                        13th Floor
                                 New York, New York 10003
                                   Attn: Corporate Trust
                                         Services
</TABLE>
 
     DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR
TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER THAN THE ONE LISTED
ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
<PAGE>   2
 
     This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal is required to be guaranteed by an "Eligible Institution"
under the instructions thereto, such signature guarantee must appear in the
applicable space provided in the signature box on the Letter of Transmittal.
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to the Company, upon the terms and subject
to the conditions set forth in the Prospectus and the related Letter of
Transmittal, receipt of which is hereby acknowledged, the principal amount of
Notes set forth below pursuant to the guaranteed delivery procedures set forth
in the Prospectus and in Instruction 2 of the Letter of Transmittal.
 
     All authority conferred or agreed to be conferred by this Notice of
Guaranteed Delivery shall not be affected by, and shall survive, the death or
incapacity of the undersigned, and every obligation of the undersigned under
this Notice of Guaranteed Delivery shall be binding upon the heirs, executors,
administrators, trustees in bankruptcy, personal and legal representatives,
successors and assigns of the undersigned.
 
     The undersigned hereby tenders the Notes listed below:
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------
CERTIFICATE NUMBER(S) (IF KNOWN) OF
   NOTES OR AGGREGATE PRINCIPAL          ACCOUNT NUMBER AT THE            AGGREGATE PRINCIPAL
        AMOUNT REPRESENTED                BOOK-ENTRY FACILITY               AMOUNT TENDERED
- ---------------------------------------------------------------------------------------------------
<S>                                 <C>                             <C>
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
</TABLE>
 
                                        2
<PAGE>   3
 
                            PLEASE SIGN AND COMPLETE
- --------------------------------------------------------------------------------
 
 Signature(s) of Registered Holder(s) or
 Authorized Signatory:
 -------------------------------
 -------------------------------------------------------
 Name(s) of Registered Holder(s):
 -----------------
 -------------------------------------------------------
 Principal Amount of Notes Tendered and as to
 which Consents are given:
 --------------------------
 Certificate No(s). of Notes
 (if available):
 ---------------------------------------
Date:
- ------------------------------------------------
Address:
- ---------------------------------------------
 
         ------------------------------------------------------
Area Code and Telephone No.:
- --------------------
If Notes will be delivered by book-entry
transfer to DTC, check the box: [ ]
DTC Account
No.:
- -------------------------------------------------
 
      This Notice of Guaranteed Delivery must be signed by the holder(s)
 exactly as their name(s) appear on certificates for the Notes or on a security
 position listing as the owner of Notes, or by person(s) authorized to become
 holder(s) by endorsements and documents transmitted with this Notice of
 Guaranteed Delivery. If signature is by a trustee, executor, administrator,
 guardian, attorney-in-fact, officer or other person acting in a fiduciary or
 representative capacity, such person must provide the following information.
 
 Please print name(s) and address(es).
 
 Name(s):
 ------------------------------------------------------------------------------
 
          ---------------------------------------------------------------------
 
 Capacity:
 ------------------------------------------------------------------------------
 
         ----------------------------------------------------------------------
 
 Address(es):
 ------------------------------------------------------------------------------
 
            -------------------------------------------------------------------
 
                                        3
<PAGE>   4
 
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
     The undersigned, a firm which is a member of a registered national
securities exchange or of the National Association of Securities Dealers, Inc.,
or is a commercial bank or trust company having an office or correspondent in
the United States, or is otherwise an "eligible guarantor institution" within
the meaning of Rule 17Ad-15 under the Securities Exchange Act of 1934, as
amended, guarantees deposit with the Exchange Agent of the Letter of Transmittal
(or facsimile thereof), together with the Notes tendered hereby in proper form
for transfer (or confirmation of the book-entry transfer of such Notes into the
Exchange Agent's account at the Book-Entry Transfer Facility described in the
Prospectus under the caption "The Exchange Offer -- How to Tender" and in the
Letter of Transmittal) and any other required documents, all by 5:00 p.m., New
York City time, on the third New York Stock Exchange trading day following the
Expiration Date.
 
                      PLEASE PRINT NAMES(S) AND ADDRESS(S)
 
Name of firm:
- --------------------------------------------------------------------------------
 
Authorized Signature:
- --------------------------------------------------------------------------------
 
Title:
- --------------------------------------------------------------------------------
 
Address:
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                                               (Zip Code)
 
Area Code and Telephone Number:
- ---------------------------------------------------------------------------
 
Dated: ____________ , 1998
 
DO NOT SEND NOTES WITH THIS FORM. ACTUAL SURRENDER OF NOTES MUST BE MADE
PURSUANT TO, AND BE ACCOMPANIED BY, AN EXECUTED LETTER OF TRANSMITTAL.
 
                                        4
<PAGE>   5
 
                 INSTRUCTIONS FOR NOTICE OF GUARANTEED DELIVERY
 
     1. DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY. A properly completed and
duly executed copy of this Notice of Guaranteed Delivery and any other documents
required by this Notice of Guaranteed Delivery must be received by the Exchange
Agent at its address set forth herein prior to the Expiration Date. The method
of delivery of this Notice of Guaranteed Delivery and any other required
documents to the Exchange Agent is at the election and sole risk of the holder,
and the delivery will be deemed made only when actually received by the Exchange
Agent. If delivery is by mail, registered mail with return receipt requested,
properly insured, is recommended. As an alternative to delivery by mail, the
holder may wish to consider using an overnight or hand delivery service. In all
cases, sufficient time should be allowed to assure timely delivery. For a
description of the guaranteed delivery procedures, see Instruction 2 of the
Letter of Transmittal.
 
     2. SIGNATURES ON THIS NOTICE OF GUARANTEED DELIVERY. If this Notice of
Guaranteed Delivery is signed by the registered holder(s) of the Notes referred
to herein, the signature must correspond with the name(s) written on the face of
the Notes without alteration, enlargement, or any change whatsoever. If this
Notice of Guaranteed Delivery is signed by a participant of the Book-Entry
Transfer Facility whose name appears on a security position listing as the owner
of the Notes, the signature must correspond with the name shown on the security
position listing as the owner of the Notes.
 
     If this Notice of Guaranteed Delivery is signed by a person other than the
registered holder(s) of any Notes listed or a participant of the Book-Entry
Transfer Facility, this Notice of Guaranteed Delivery must be accompanied by
appropriate Notes powers, signed as the name of the registered holder(s) appears
on the Notes or signed as the name of the participant shown on the Book-Entry
Transfer Facility's security position listing. If this Notice of Guaranteed
Delivery is signed by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation, or other person acting in a
fiduciary or representative capacity, such person should so indicate when
signing and submit with the Letter of Transmittal evidence satisfactory to the
Company of such person's authority to so act.
 
     3. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES. Questions and requests for
assistance and requests for additional copies of the Prospectus may be directed
to the Exchange Agent at the address specified in the Prospectus. Holders may
also contact their broker, dealer, commercial bank, trust company, or other
nominee for assistance concerning the Exchange Offer.
 
                                        5


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