UNITED STATES FILTER CORP
S-3/A, 1998-04-01
REFRIGERATION & SERVICE INDUSTRY MACHINERY
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              As filed with the Securities and Exchange Commission
   
                                on April 1, 1998
                                                      Registration No. 333-45981
    
        -----------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                       ----------------------------------
   
                               AMENDMENT NO. 1 TO
    
                                    FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                        ---------------------------------

                        UNITED STATES FILTER CORPORATION
             (Exact name of registrant as specified in its charter)

DELAWARE                                    3589
(State or other jurisdiction                (Primary Standard Industrial
of incorporation or organization)           Classification Code Number)

33-0266015
(I.R.S. Employer
Identification No.)
                               40-004 COOK STREET
                          PALM DESERT, CALIFORNIA 92211
                                 (760) 340-0098
                        (Address, including zip code, and
                    telephone number, including area code, of
                    registrant's principal executive offices)

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

                               DAMIAN C. GEORGINO
   
                    EXECUTIVE VICE PRESIDENT, GENERAL COUNSEL
    
                             AND CORPORATE SECRETARY
                        UNITED STATES FILTER CORPORATION
                               40-004 COOK STREET
                          PALM DESERT, CALIFORNIA 92211
                                 (760) 340-0098
                     (Name, address, including zip code, and
          telephone number, including area code, of agent for service)

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

                                    Copy to:
                                JANICE C. HARTMAN
                           KIRKPATRICK & LOCKHART LLP
                              1500 OLIVER BUILDING
                         PITTSBURGH, PENNSYLVANIA 15222
                                 (412) 355-6500


<PAGE>

APPROXIMATE  DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC:  From time to time
after this registration statement becomes effective.

         If the only securities  being registered on this Form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box.
     ------
         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933,  other than  securities  offered only in connection with
dividend or interest reinvestment plans, check the following box.  X
                                                                 -----
         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration  statement for the same offering.
                                                        ------
         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the  Securities  Act,  please check the  following box and list the
Securities  Act  registration   statement   number  of  the  earlier   effective
registration statement for the same offering.
                                              ------
         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box.
                                    ------

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

    


<PAGE>


================================================================================
Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  Prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.
================================================================================

   
SUBJECT TO COMPLETION DATED APRIL 1, 1998
    




PROSPECTUS
             , 1998


                                5,815,450 SHARES

                        UNITED STATES FILTER CORPORATION

                                  COMMON STOCK
                           (PAR VALUE $.01 PER SHARE)

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

         This prospectus  provides for the offering by the Selling  Stockholders
named  herein (the  "Selling  Stockholders")  of up to an aggregate of 5,815,450
shares (the  "Shares") of the Common  Stock,  par value $.01 per share  ("Common
Stock"),  of United States Filter  Corporation (the "Company").  The Shares were
acquired by the Selling  Stockholders  named herein on January 16, 1998 pursuant
to the terms of a Merger  Agreement,  dated as of December 31,  1997,  among the
Company,  The Kinetics Group,  Inc.  ("Kinetics"),  U.S.  Filter/KG  Acquisition
Corp.,  The Bianco  Family 1991 Trust (the "Bianco  Trust"),  Dated  February 1,
1991, David J. Shimmon and BT Capital Partners,  Inc. (the "Merger  Agreement").
The Shares were issued in  consideration  of the  acquisition  by the Company of
Kinetics,  effective  as of  December  31,  1997 (the  "Merger").  See  "Selling
Stockholders."

         The acquisition of Kinetics was accounted for as a pooling of interests
and accordingly the holders of an aggregate of 5,551,369  shares (the "Affiliate
Shares") may not sell,  transfer or otherwise dispose of any Shares prior to the
date that the Company publishes  financial results covering at least thirty days
of  combined  operations  of the  Company  and  Kinetics.  In  addition,  of the

<PAGE>

5,815,450 shares, an aggregate of 290,194 Shares (the "Escrow Shares"),  277,569
of which are included in the Affiliate  Shares,  are held in escrow by PNC Bank,
escrow  agent,  under an Escrow  Agreement  entered into  pursuant to the Merger
Agreement.  The  Escrow  Shares  are  subject  to  claims  of  the  Company  for
indemnification  under the Merger  Agreement  and, to the extent not returned to
the Company in  satisfaction of such claims for  indemnification  or pending the
resolution  of any  disputed  claims,  can be  expected to be  delivered  to the
Selling  Stockholders  based  upon  their  respective  percentage  interests  by
December 31, 1998.

         Subject to the limitations  set forth above,  the Shares may be offered
or sold by or for the account of the Selling  Stockholders  from time to time or
at one time, on one or more exchanges or otherwise, at prices and on terms to be
determined at the time of sale, to purchasers  directly or by or through brokers
or dealers, who may receive  compensation in the form of discounts,  commissions
or concessions.  The Selling Stockholders and any such brokers or dealers may be
deemed to be  "underwriters"  within the meaning of the United States Securities
Act of 1933, as amended (the "Securities  Act"), and any discounts,  concessions
and  commissions  received  by any such  brokers and dealers may be deemed to be
underwriting commissions or discounts under the Securities Act. The Company will
not receive any of the proceeds from any sale of the Shares offered hereby.  See
"Use of Proceeds," "Selling Stockholders" and "Plan of Distribution."

   
         The Common Stock is listed on the New York Stock  Exchange (the "NYSE")
and traded under the symbol  "USF." The last  reported  sale price of the Common
Stock on the NYSE on March 31, 1998 was $35.125 per share.
    

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

         SEE  "RISK  FACTORS"  BEGINNING  ON PAGE 4 FOR  CERTAIN  CONSIDERATIONS
RELEVANT TO AN INVESTMENT IN THE COMMON STOCK.

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

          THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
          COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR
            ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY
               OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION
                     TO THE CONTRARY IS A CRIMINAL OFFENSE.

<PAGE>

                              AVAILABLE INFORMATION

         The Company is subject to the informational  requirements of the United
States  Securities  Exchange Act of 1934 (the "Exchange  Act") and in accordance
therewith  files  periodic  reports,  proxy  solicitation  materials  and  other
information  with the United  States  Securities  and Exchange  Commission  (the
"Commission").  Such reports, proxy solicitation materials and other information
can be inspected and copied at the public reference facilities maintained by the
Commission at Judiciary Plaza, 450 Fifth Street,  N.W.,  Washington,  D.C. 20549
and at the  Commission's  Regional  Offices located at Seven World Trade Center,
Suite  1300,  New York,  New York 10048 and  Citicorp  Center  500 West  Madison
Street, Suite 1400, Chicago,  Illinois 60661-2511.  Copies of such materials can
be  obtained  from the Public  Reference  Section of the  Commission,  450 Fifth
Street,  N.W.,  Washington,  D.C.  20549,  at prescribed  rates.  The Commission
maintains a Web site that contains reports, proxy and information statements and
other  information  regarding  registrants  that  file  electronically  with the
Commission. Such reports, proxy and information statements and other information
may be found on the Commission's  site address,  http://www.sec.gov.  The Common
Stock is listed on the NYSE.  Such  reports,  proxy  solicitation  materials and
other  information  can also be  inspected  and  copied  at the NYSE at 20 Broad
Street, New York, New York 10005.


                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
         The following  documents  filed by the Company (File No.  1-10728) with
the  Commission  pursuant to the  Exchange  Act are  incorporated  by  reference
herein: the Company's Annual Report on Form 10-K for the fiscal year ended March
31, 1997; the Company's  Quarterly  Reports for the quarters ended June 30, 1997
(as  amended on Form  10-Q/A  dated  August 22,  1997),  September  30, 1997 and
December 31, 1997;  the  Company's  Current  Reports on Form 8-K dated August 4,
1997,  September 17, 1997,  September 19, 1997,  December 9, 1997 (as amended on
Form  8-K/As  dated  February  6, 1998 and March 4, 1998),  December  31,  1997,
January 16, 1998 (as amended on Form 8-K/As dated  February 6, 1998 and March 4,
1998) and February 9, 1998; and the description of the Common Stock contained in
the Company's Registration Statement on Form 8-A, as the same may be amended.
    

         All documents and reports subsequently filed by the Company pursuant to
Sections  13(a),  13(c),  14 or 15(d) of the Exchange Act after the date of this
Prospectus and prior to the  termination of the offering made by this Prospectus
shall be deemed to be incorporated by reference herein. Any statement  contained
herein or in a document  incorporated  or deemed to be incorporated by reference
herein  shall be  deemed to be  modified  or  superseded  for  purposes  of this


                                       2
<PAGE>

Prospectus  to  the  extent  that  a  statement   contained  herein  or  in  any
subsequently  filed  document  which  is or is  deemed  to  be  incorporated  by
reference  herein modifies or supersedes  such statement.  Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Prospectus.

         The  Company  will  provide  to  each  person  to  whom a copy  of this
Prospectus  is  delivered,  upon the  written or oral  request  of such  person,
without  charge,  a copy of any or all of the  documents  that are  incorporated
herein by  reference,  other than  exhibits  to such  information  (unless  such
exhibits  are  specifically  incorporated  by  reference  into such  documents).
Requests   should  be  directed  to  General   Counsel,   United  States  Filter
Corporation,  40-004 Cook Street, Palm Desert, California 92211 (telephone (760)
340-0098).


                                   THE COMPANY

   
         The Company is a leading  global  provider of industrial  and municipal
water and wastewater treatment systems, products and services, with an installed
base of systems that the Company believes is the largest worldwide.  The Company
offers a  single-source  solution  to its  customers  through  what the  Company
believes is the industry's broadest range of cost-effective  systems,  products,
services and proven technologies.  In addition, the Company markets a broad line
of waterworks  distribution  products and  services.  The Company has one of the
industry's  largest  networks of sales and service and  distribution  facilities
through  more  than  600  locations  including  88  manufacturing  plants  in 32
countries.  The  Company  capitalizes  on its large  installed  base,  extensive
distribution  network and  manufacturing  capabilities to provide customers with
ongoing  local  service and  maintenance.  The Company is a leading  provider of
outsourced  water  services,  including  the  operation of water and  wastewater
treatment  systems at  customer  sites.  In  addition,  the  Company is actively
involved in the  development of  privatization  initiatives  for municipal water
treatment  facilities  throughout  the world  and,  particularly,  in the United
States,  Mexico and Canada.  The Company also owns  substantial  properties with
appurtenant water rights in the Western and Southwestern  United States that are
leased to agricultural tenants.
    

         The Company's  principal  executive  offices are located at 40-004 Cook
Street,  Palm  Desert,  California  92211,  and its  telephone  number  is (760)
340-0098.  References  herein  to the  Company  refer to  United  States  Filter
Corporation and its subsidiaries, unless the context requires otherwise.


                                       3
<PAGE>

                                  RISK FACTORS

         Prospective  investors should consider  carefully the following factors
relating to the business of the Company, together with the other information and
financial data included or incorporated by reference in this Prospectus,  before
acquiring the securities offered hereby.  Information  contained or incorporated
by reference in this Prospectus includes "forward-looking  statements" which can
be  identified by the use of  forward-looking  terminology  such as  "believes,"
"contemplates,"   "expects,"   "may,"  "will,"   "could,"   "should,"   "would,"
"anticipates" or "continue" or the negative thereof or other variations  thereon
or comparable  terminology.  No assurance  can be given that the future  results
covered  by the  forward-looking  statements  will be  achieved.  The  following
matters  constitute  cautionary  statements  identifying  important factors with
respect  to  such  forward-looking  statements,   including  certain  risks  and
uncertainties,  that could  cause  actual  results to vary  materially  from the
future results covered in such forward-looking statements.

ACQUISITION STRATEGY

   
         In pursuit of its  strategic  objective of becoming the leading  global
single-source  provider of water and wastewater  treatment systems and services,
the Company  has,  since 1991,  acquired  more than 125 United  States based and
international  businesses.  The Company plans to continue to pursue acquisitions
that expand the segments of the water and wastewater treatment and water-related
industries in which it participates,  complement its  technologies,  products or
services,  broaden its customer base and  geographic  areas served and/or expand
its  global  distribution   network,  as  well  as  acquisitions  which  provide
opportunities to further and implement the Company's  one-stop-shop  approach in
terms of technology, distribution or service. The Company's acquisition strategy
entails  the  potential  risks  inherent  in  assessing  the  value,  strengths,
weaknesses,  contingent  or other  liabilities  and potential  profitability  of
acquisition  candidates and in integrating the operations of acquired companies.
In  addition,  the  Company's  acquisition  of Memtec  Limited was  accomplished
through a tender offer,  and the Company could make other  acquisitions by means
of a tender  offer.  The  level of risk  associated  with such  acquisitions  is
generally greater because frequently they are accomplished, as was the case with
the  acquisition  of  Memtec,  without  the  customary  representations  or  due
diligence typical of negotiated transactions. Although the Company generally has
been  successful  in  pursuing  acquisitions,  there  can be no  assurance  that

                                       4
<PAGE>

acquisition  opportunities will continue to be available,  that the Company will
have access to the capital required to finance potential acquisitions,  that the
Company will continue to acquire  businesses or that any business  acquired will
be integrated successfully or prove profitable.
    

   
         On  February  9, 1998,  the Company  agreed to acquire  Culligan  Water
Technologies, Inc. ("Culligan"), pursuant to a merger (the "Culligan Merger") of
a wholly owned  subsidiary of the Company into Culligan.  In connection with the
Culligan  Merger,  the Company will issue in exchange for each share of Culligan
common stock,  1.714 shares of Common Stock if the average of the closing prices
of the  shares  of  Common  Stock as  reported  on the New York  Stock  Exchange
Composite  Tape on each of the last ten trading days ending on the sixth trading
day  prior to the date of the  meeting  of  Culligan  stockholders  at which the
approval of the  Culligan  Merger by  Culligan  stockholders  is  obtained  (the
"Average Share Price") is equal to or greater than $35 (the  "Exchange  Ratio");
provided,  however,  that (i) if the Average  Share Price is less than $35,  but
greater  than or equal to $32,  then the  Exchange  Ratio  shall be equal to the
quotient obtained (rounded to the nearest ten-thousandth of a share) by dividing
$60 by the Average Share Price; and (ii) if the Average Share Price is less than
$32, the Exchange Ratio shall be equal to 1.875. Among other circumstances,  the
agreement  pursuant  to  which  the  Culligan  Merger  will be  effected  may be
terminated  by  Culligan if the Average  Share  Price,  or if the average of the
closing  prices of the shares of Common  Stock as reported on the New York Stock
Exchange Composite Tape for any period of 10 consecutive trading days which ends
after the last trading day used in calculating  the Average Share Price, is less
than  $26.25.  Holders of an  aggregate  of 28.5% of the  outstanding  shares of
Culligan common stock have agreed to vote in favor of the Culligan Merger. There
can be no  assurance  that the  Culligan  Merger  will be  consummated,  or,  if
consummated,  that the Culligan businesses will be integrated  successfully into
the Company's  businesses or prove profitable.  The shares of Common Stock to be
issued in the Culligan Merger are expected to represent  approximately  28.9% of
the number of shares of Common Stock outstanding  immediately after the Culligan
Merger (assuming the Average Share Price is $35.125, which was the last reported
sale price of the Common Stock on the NYSE on March 31, 1998). Accordingly,  the
Culligan Merger will have the effect of reducing the percentage  voting interest
in the Company  represented by a share of Common Stock  immediately prior to the
Culligan Merger, with respect to stockholders of the Company.
    

INTERNATIONAL TRANSACTIONS

         The Company has made and expects it will continue to make  acquisitions
and expects to obtain  contracts  in markets  outside the United  States.  While

                                       5
<PAGE>

these activities may provide  important  opportunities  for the Company to offer
its products and services internationally, they also entail the risks associated
with  conducting  business  internationally,  including  the  risk  of  currency
fluctuations,  slower  payment of invoices,  the lack in some  jurisdictions  of
well-developed legal systems, nationalization and possible social, political and
economic instability.  In particular,  the Company has significant operations in
Asia which will be adversely  affected by current  economic  conditions  in that
region.  While the full impact of this economic instability cannot be predicted,
it  could  have  a  material  adverse  effect  on  the  Company's  revenues  and
profitability.

RELIANCE ON KEY PERSONNEL

         The Company's  operations  are  dependent on the  continued  efforts of
senior management,  in particular Richard J. Heckmann, the Company's Chairman of
the Board, President and Chief Executive Officer. The Company does not presently
have employment agreements with most members of senior management, including Mr.
Heckmann. Should any of the Company's senior managers be unable or choose not to
continue in their  present  roles,  the Company's  prospects  could be adversely
affected.

PROFITABILITY OF FIXED PRICE CONTRACTS

   
         A  significant  portion of the Company's  revenues are generated  under
fixed  price  contracts.   To  the  extent  that  original  cost  estimates  are
inaccurate,  scheduled  deliveries  are delayed or progress  under a contract is
otherwise  impeded,  revenue  recognition  and  profitability  from a particular
contract may be adversely  affected.  The Company  routinely  records  upward or
downward  adjustments  with respect to fixed price  contracts  due to changes in
estimates of costs to complete such  contracts.  There can be no assurance  that
future downward adjustments will not be material.
    

CYCLICALITY, SEASONALITY AND POSSIBLE EARNINGS FLUCTUATIONS

         The sale of capital  equipment  within the water treatment  industry is
cyclical and influenced by various economic factors including interest rates and
general  fluctuations  of the  business  cycle.  A  significant  portion  of the
Company's  revenues are derived from capital equipment sales.  While the Company
sells  capital  equipment  to  customers  in  diverse  industries  and in global
markets,  cyclicality  of capital  equipment  sales and  instability  of general
economic conditions, including those currently unfolding in Asian markets, could
have a material adverse effect on the Company's revenues and profitability.


                                       6
<PAGE>

   
         The sale of water and wastewater distribution equipment and supplies is
also cyclical and  influenced by various  economic  factors  including  interest
rates, land development and housing construction  industry cycles. Sales of such
equipment  and supplies are also  subject to seasonal  fluctuation  in temperate
climates.  The sale of water and wastewater  distribution equipment and supplies
is  a  significant   component  of  the  Company's  business.   Cyclicality  and
seasonality  of water and wastewater  distribution  equipment and supplies sales
could  have  a  material   adverse   effect  on  the   Company's   revenues  and
profitability.
    

         The  Company's  high-purity  process  piping  systems  have  been  sold
principally  to  companies  in  the  semiconductor  and,  to  a  lesser  extent,
pharmaceutical  and  biotechnology  industries,  and sales of those  systems are
critically dependent on these industries. The success of customers and potential
customers  for  high-purity   process  piping  systems  is  linked  to  economic
conditions  in these  respective  industries,  which in turn are each subject to
intense  competitive  pressure and are affected by overall economic  conditions.
The semiconductor  industry in particular has historically been, and will likely
continue to be,  cyclical in nature and  vulnerable to general  downturns in the
economy.   The  semiconductor  and  pharmaceutical   industries  also  represent
significant  markets for the Company's water and wastewater  treatment  systems.
Downturns  in these  industries  could  have a  material  adverse  effect on the
Company's revenues and profitability.

         Operating  results from the sale of high-purity  process piping systems
also can be expected to fluctuate  significantly as a result of the limited pool
of  existing  and  potential  customers  for these  systems,  the  timing of new
contracts,  possible  deferrals or cancellations  of existing  contracts and the
evolving and unpredictable  nature of the markets for high-purity process piping
systems.

         As a result of these and other factors, the Company's operating results
may be subject to  quarterly or annual  fluctuations.  There can be no assurance
that at any given time the Company's operating results will meet or exceed stock
market  analysts'  expectations,  in which event the market  price of the Common
Stock could be adversely affected.

POTENTIAL ENVIRONMENTAL RISKS

         The Company's business and products may be significantly  influenced by
the  constantly  changing  body of  environmental  laws and  regulations,  which
require that certain environmental standards be met and impose liability for the


                                       7
<PAGE>

failure to comply with such  standards.  The Company is also subject to inherent
risks  associated with  environmental  conditions at facilities  owned,  and the
state of compliance  with  environmental  laws,  by  businesses  acquired by the
Company.  While  the  Company  endeavors  at each of its  facilities  to  assure
compliance with  environmental  laws and regulations,  there can be no assurance
that the Company's operations or activities,  or historical operations by others
at the Company's  locations,  will not result in cleanup  obligations,  civil or
criminal  enforcement  actions  or  private  actions  that could have a material
adverse effect on the Company.

   
         In that regard,  at a facility operated by a wholly owned subsidiary of
the Company (the "South Windsor Subsidiary") at a Connecticut ion exchange resin
regeneration  facility (the "South Windsor Facility") acquired by the Company in
October 1995 from Anjou International  Company ("Anjou"),  United States federal
and state  environmental  regulatory  authorities have issued certain notices of
violation  alleging multiple  violations of applicable  wastewater  pretreatment
standards.  A grand  jury  investigation  concerning  these  conditions  also is
pending. The South Windsor Subsidiary has reached a tentative agreement with the
United States Attorney's Office and the United States  Environmental  Protection
Agency ("USEPA") to settle all agency claims and investigations relating to this
matter by pleading  guilty to a single  violation of the Federal Water Pollution
Control Act. The proposed  settlement  includes a fine and annual  environmental
compliance  audits at the South  Windsor  Facility  for five years.  The Company
believes  that this  settlement  will  conclude  this  matter  in its  entirety;
however,  there can be no  assurance  that the proposed  settlement  will become
final,  and it is not  expected  that it would  include a formal  release of all
liabilities  in this regard.  As a consequence  of such a settlement,  the South
Windsor Subsidiary would be barred from United States government contracts for a
period of time that the Company  currently  expects to be brief.  Based upon the
anticipated settlement and on certain rights of indemnification from Anjou which
may be  available  with respect to these  matters,  the Company does not believe
that this matter will have a material adverse effect on the Company.
    

   
         With respect to a facility operated by a wholly owned subsidiary of the
Company (the "El Cajon  Subsidiary")  at a former  California ion exchange resin
regeneration facility (the "El Cajon Facility"), the county district attorney is
investigating  a  hydrochloric  acid  spill  that  occurred  in early  1997.  In
connection  with this  incident,  the  Company  and the  office of the  district
attorney have reached a proposed  settlement whereby the Company will agree to a
civil violation of California Health and Safety Code Section  25189.2(c) and pay

                                       8
<PAGE>

$140,000,  including a civil  penalty of  $25,000.  Pursuant to the terms of the
settlement,  the office of the  district  attorney  would agree that it will not
subject the Company (or its  subsidiaries  and  affiliates)  to further civil or
criminal prosecution.
    

         In addition to the  foregoing,  the  Company's  activities as owner and
operator of certain  hazardous  waste  treatment  and  recovery  facilities  are
subject to stringent laws and  regulations  and compliance  reviews.  Failure of
these  facilities to comply with those  regulations  could result in substantial
fines and the suspension or revocation of the facility's hazardous waste permit.
The Company  serves as contract  operator of various  municipal  and  industrial
wastewater  collection  and treatment  facilities,  which were developed and are
owned by governmental  or private  entities.  Under those service  contracts and
applicable  environmental laws, the Company as operator may incur liabilities in
the event those facilities experience malfunctions or discharge wastewater which
does not meet  applicable  permit limits and  regulatory  requirements.  In some
cases,  the potential for such  liabilities  depends upon design or  operational
conditions  over  which the  Company  has  limited,  if any,  control.  In other
matters,  the  Company  has been  notified  by the United  States  Environmental
Protection  Agency  that  it  is  a  potentially  responsible  party  under  the
Comprehensive  Environmental Response,  Compensation,  and Liability Act of 1980
("CERCLA") at certain sites to which the Company or its  predecessors  allegedly
sent waste in the past. It is possible that the Company could receive other such
notices under CERCLA or analogous state laws in the future. The Company does not
believe that its liability,  if any,  relating to such matters will be material.
However,  there can be no assurance  that such matters will not be material.  In
addition,  to some extent,  the liabilities  and risks imposed by  environmental
laws on the Company's  customers may adversely  impact demand for certain of the
Company's  products or services or impose greater  liabilities  and risks on the
Company,  which could also have an adverse  effect on the Company's  competitive
and financial position.

COMPETITION

   
         All  of  the  markets  in  which  the  Company   competes   are  highly
competitive,   and  most  are  fragmented,  with  numerous  regional  and  local
participants.  There are  competitors of the Company in certain markets that are
divisions or subsidiaries of companies that have significantly greater resources
than the Company. The Company's process water treatment business competes in the
United States and  internationally  principally on the basis of product  quality
and  specifications,  technology,  reliability,  price,  customized  design  and
technical  qualifications,  reputation and prompt availability of local service.
The Company's  wastewater  treatment  business competes in the United States and
internationally  largely on the basis of the same  factors,  except that pricing

                                       9
<PAGE>

considerations  can  be  predominant  among  competitors  that  have  sufficient
technical  qualifications,  particularly in the municipal  contract bid process.
The Company's  filtration and separation  business competes in the United States
and  internationally  principally  on the basis of price,  technical  expertise,
product  quality and  responsiveness  to customer needs,  including  service and
technical  support.  The  Company's  industrial  products and services  business
competes in the United States and  internationally  principally  on the basis of
quality,  service and price.  In  connection  with the  marketing of  waterworks
distribution  equipment and supplies, the Company competes not only with a large
number of independent  wholesalers and with other distribution chains similar to
the Company,  but also with  manufacturers  who sell directly to customers.  The
principal  methods of  competition  for the  Company's  waterworks  distribution
business include prompt local service capability, product knowledge by the sales
force and service branch management,  and price. The Company's consumer products
business competes with companies with national distribution networks, businesses
with regional scope, and local product assemblers or service companies,  as well
as retail outlets. The Company believes that there are thousands of participants
in the  residential  water business.  The consumer  products  business  competes
principally  on the  basis of  price,  product  quality  and  "taste,"  service,
distribution  capabilities,  geographic  presence  and  reputation.  Competitive
pressures,  including those described  above,  and other factors could cause the
Company to lose  market  share or could  result in  significant  price  erosion,
either  of which  could  have a  material  adverse  effect  upon  the  Company's
financial position, results of operations and cash flows.
    

POTENTIAL RISKS RELATED TO WATER RIGHTS AND WATER TRANSFERS

   
         The Company  recently  acquired more than 47,000 acres of  agricultural
land  (the  "Properties"),  situated  in the  Southwestern  United  States,  the
substantial  majority  of which are in  Imperial  County,  California  (the "IID
Properties")  located  within the  Imperial  Irrigation  District  (the  "IID").
Substantially  all of  the  Properties  are  currently  leased  to  third  party
agricultural  tenants,  including  prior owners of the  Properties.  The Company
acquired the Properties with appurtenant  water rights,  and is actively seeking
to  acquire   additional   properties  with  water  rights,   primarily  in  the
Southwestern  and Western United  States.  The Company may seek in the future to
transfer  water  attributable  to water rights  appurtenant  to the  Properties,
particularly the IID Properties (the "IID Water").  However, since the IID holds
title to all of the water rights within the IID in trust for the landowners, the
IID would  control  the  timing and terms of any  transfers  of IID Water by the
Company.  The  circumstances  under which transfers of water can be made and the
profitability  of  any  transfers  are  subject  to  significant  uncertainties,


                                       10
<PAGE>

including  hydrologic  risks of variable  water  supplies,  risks  presented  by
allocations of water under  existing and  prospective  priorities,  and risks of
adverse changes to or interpretations of United States federal,  state and local
laws,  regulations  and policies.  Transfers of IID Water  attributable to water
rights appurtenant to the IID Properties (the "IID Water Rights") are subject to
additional  uncertainties.  Allocations  of Colorado  River water,  which is the
source of all water deliveries to the IID Properties, are subject to limitations
under complex international treaties, interstate compacts, United States federal
and state laws and regulations,  and contractual  arrangements  and, in times of
drought,  water deliveries  could be curtailed by the United States  government.
Further,  any  transfers  of IID Water would  require the approval of the United
States  Secretary  of the  Interior.  Even if a transfer  were  approved,  other
California  water  districts  and users could assert  claims  adverse to the IID
Water  Rights,  including  but not  limited to claims that the IID has failed to
satisfy  United States federal law and  California  constitutional  requirements
that IID Water must be put to reasonable and beneficial  use. A finding that the
IID's water use is unreasonable or nonbeneficial could adversely impact title to
the IID Water Rights and the ability to transfer IID Water. Water transferred by
the IID to metropolitan areas of Southern  California,  such as San Diego, would
be transported  through aqueducts owned or controlled by the Metropolitan  Water
District, a  quasi-governmental  agency (the "MWD"). The transportation cost for
any  transfer of IID Water and the volume of water which the MWD can be required
to  transport  at  any  time  are  subject  to  California   laws  of  uncertain
application,   some  aspects  of  which  are   currently  in   litigation.   The
uncertainties  associated with water rights could have a material adverse effect
on the Company's future profitability.
    

TECHNOLOGICAL AND REGULATORY RISKS

   
         Portions  of  the  water  and   wastewater   treatment   business   are
characterized by changing  technology,  competitively  imposed process standards
and  regulatory  requirements,  each of  which  influences  the  demand  for the
Company's   products  and   services.   Changes  in   regulatory  or  industrial
requirements  may  render  certain  of  the  Company's  treatment  products  and
processes  obsolete.  Acceptance  of new  products  may also be  affected by the
adoption  of  new  government  regulations  requiring  stricter  standards.  The
Company's  ability  to  anticipate   changes  in  technological  and  regulatory
standards and to develop successfully and introduce new and enhanced products on
a timely basis will be a significant factor in the Company's ability to grow and
to remain  competitive.  There can be no assurance that the Company will be able
to achieve the  technological  advances  that may be necessary  for it to remain


                                       11
<PAGE>

competitive  or that  certain  of its  products  will not  become  obsolete.  In
addition,  the  Company is subject to the risks  generally  associated  with new
product  introductions  and applications,  including lack of market  acceptance,
delays in development or failure of products to operate properly.
    

         There can be no  assurance  that the  Company's  existing or any future
trademarks or patents will be enforceable or will provide substantial protection
from competition or be of commercial  benefit to the Company.  In addition,  the
laws of certain  non-United States countries may not protect  proprietary rights
to the same extent as do the laws of the United States. Successful challenges to
certain of the Company's patents or trademarks could materially adversely affect
its competitive and financial position.

MUNICIPAL WATER AND WASTEWATER BUSINESS

   
         A  significant  percentage  of the  Company's  revenues is derived from
municipal  customers.  While  municipalities  represent an important part of the
water and wastewater  treatment  industry,  contractor  selection  processes and
funding for projects in the municipal sector entail certain additional risks not
typically encountered with industrial customers.  Competition for selection of a
municipal contractor typically occurs through a formal bidding process which can
require the  commitment  of  resources  and greater  lead times than  industrial
projects.  In  addition,  this  segment is dependent  upon the  availability  of
funding at the local level,  which may be the subject of increasing  pressure as
local  governments  are  expected to bear a greater  share of the cost of public
services.
    

YEAR 2000 RISKS

   
         The Year 2000 issue  concerns the  potential  exposures  related to the
automated generation of business and financial misinformation resulting from the
application  of  computer  programs  which have been  written  using two digits,
rather than four, to define the applicable year of business  transactions.  Most
of the Company's  operating  systems with Year 2000 issues have been modified to
address  those  issues;   accordingly,   management   does  not  anticipate  any
significant costs, problems or uncertainties  associated with becoming Year 2000
compliant.  The Company is currently  developing a plan  intended to assure that
its other  internal  operating  systems  with Year 2000 issues are modified on a
timely  basis.  Suppliers,  customers  and  creditors  of the Company  also face

                                       12
<PAGE>

similar Year 2000 issues. A failure to successfully  address the Year 2000 issue
could have a material  adverse  effect on the  Company's  business or results of
operations.
    

SHARES ELIGIBLE FOR FUTURE SALE

   
         The market price of the Common Stock could be adversely affected by the
availability  for  public  sale of  shares  held on March 31,  1998 by  security
holders of the  Company,  including:  (i) up to  3,646,783  shares  which may be
delivered by Laidlaw Inc. or its affiliates ("Laidlaw"),  at Laidlaw's option in
lieu of cash, at maturity pursuant to the terms of 5-3/4% Exchangeable Notes due
2000 of Laidlaw (the amount of shares or cash  delivered or paid to be dependent
within certain  limits upon the value of the Common Stock at maturity),  or sold
from time to time in accordance  with Rule 144(k) under the Securities Act; (ii)
7,636,364  shares  issuable  upon  conversion  of the  Company's 6%  Convertible
Subordinated  Notes due 2005 at a conversion price of $18.33 per share of Common
Stock;  (iii) 10,481,013 shares issuable upon conversion of the Company's 4-1/2%
Convertible  Subordinated  Notes due 2001 at a  conversion  price of $39.50  per
share of Common Stock; (iv) 1,200,000 shares issuable upon exercise of warrants,
600,000  at an  exercise  price of $50.00 per share and  600,000 at an  exercise
price of $60.00 per share,  in each case  expiring  on  September  17,  2007 and
exercisable  at any time  after  the  first  sale of  water  from  water  rights
appurtenant to the Properties (the  "Warrants");  and (v) 8,496,157  outstanding
shares  which are  subject to  agreements  pursuant  to which the  holders  have
certain  rights to request  the Company to  register  the sale of such  holders'
Common Stock under the Securities Act and/or, subject to certain conditions,  to
include  certain  percentages  of such shares in other  registration  statements
filed by the  Company,  of which  such  rights as to  8,000,000  shares  are not
exercisable until February 17, 2000. In addition, the Company has registered for
sale under the  Securities  Act  2,903,207  shares  which may be issuable by the
Company from time to time in  connection  with  acquisitions  of  businesses  or
assets  from  third  parties.   Upon   consummation  of  the  Culligan   Merger,
approximately  12,571,948  shares to be issued  pursuant  thereto  (assuming the
Average Share price is $35.125) will be subject to agreements  pursuant to which
certain stockholders will have certain rights to request the Company to register
the sale of such shares  under the  Securities  Act  and/or,  subject to certain
conditions,  to include certain percentages of such shares in other registration
statements filed by the Company. See "Risk Factors - Acquisition Strategy."
    


                                       13
<PAGE>

                                 USE OF PROCEEDS

         The Selling  Stockholders will receive all of the net proceeds from any
sale of the Shares offered  hereby,  and none of such proceeds will be available
for use by the Company or otherwise for the Company's benefit.


                              SELLING STOCKHOLDERS

         The following  table sets forth the names of the Selling  Stockholders,
the total  number of Shares  owned,  including  separately  the number of shares
subject to the Escrow  Agreement and the number of shares as adjusted to reflect
the  sale  of the  Shares  by the  Selling  Stockholders.  Each  of the  Selling
Stockholders  acquired the Shares on January 16, 1998, and the respective number
of shares  indicated as to each Selling  Stockholder  constitutes  less than one
percent of the shares of Common Stock  outstanding as of such date, except as to
The Bianco Trust,  David J. Shimmon and BT Capital  Partners  Inc.,  which owned
beneficially 2.2%, 1.9% and 1.1% as of such date.

<TABLE>
<CAPTION>
                                                                                                Shares
         Name of                   Shares              Shares                Maximum          Beneficially
         Selling                Beneficially           Subject            Shares to be          Owned As
       Stockholder                  Owned             to Escrow               Sold              Adjusted

<S>                              <C>                    <C>                 <C>                     <C>
The Bianco                     2,314,995              115,750              2,314,995               --
Family 1991
Trust, dated
February 1,
1991

David J.                         2,052,920              102,646              2,052,920               --
Shimmon

BT Capital                       1,183,454               59,173              1,183,454               --
Partners Inc.

Churchill                          92,600                4,630                 92,600                --
ESOP Capital
Partners

D&S Partners                     50,958(1)               1,966               50,958(1)               --

Silicon                            38,476                1,924                 38,476                --
Valley
Bancshares

                                       14
<PAGE>

                                                                                                Shares
         Name of                   Shares              Shares                Maximum          Beneficially
         Selling                Beneficially           Subject            Shares to be          Owned As
       Stockholder                  Owned             to Escrow               Sold              Adjusted

L.H. Friend,                       36,921                1,847                 36,921                --
Weinress,               
Frankson &
Presson, Inc.

Gregory                            26,665                1,334                 26,665                --
Presson

Christopher                        18,461                 924                  18,461                --
Holloran

Total                           5,815,450(1)            290,194             5,815,450(1)             --

</TABLE>

- ----------------
(1)  Includes  11,647  shares of Common  Stock which the holder has the right to
     acquire  pursuant  to  options  at an  exercise  price of $12.02 per share,
     giving effect to the conversion in accordance with the Merger  Agreement of
     options to purchase shares of the Common Stock of Kinetics.

   
         Pursuant to the Merger Agreement, the Company acquired from the Selling
Stockholders  all of the  issued  and  outstanding  shares of  capital  stock of
Kinetics. Other than their equity holdings in Kinetics, the Selling Stockholders
do not have, and within the past three years did not have, any position,  office
or other material  relationship  with the Company or any of its  predecessors or
affiliates,  except that:  (i) William A.  Bianco,  Jr., a Trustee of the Bianco
Trust,  was the  founder of Kinetics in 1973 and served as Chairman of the Board
from 1980 until the consummation of the Merger and as Chief Executive Officer of
Kinetics  from 1973 through March 1997;  (ii) Marie R. Bianco,  a Trustee of the
Bianco Trust, served as Executive Vice President and a Director of Kinetics from
1989 until the consummation of the Merger;  (iii) David J. Shimmon has served as
President/Chief  Operating  Officer of the  Company's  Industrial  Products  and
Services  Group since March 1998, as Chief  Executive  Officer of Kinetics since
March 1997, as President  and Director of Kinetics  since October 1990, as Chief
Financial Officer of Kinetics from 1991 until the consummation of the Merger and
as Executive  Vice  President of Kinetics  from October 1990 through March 1996;
(iv) BT Capital Partners ("BT") purchased 2,250,000 shares of Series A Preferred
Stock  from  Kinetics  in  June  1995  and  loaned  Kinetics  $10,000,000  in  a
subordinated debt offering in June 1997 which was repaid by the Company upon the
consummation of the Merger;  (v) Martin M. Jelenko,  a consultant or employee of

                                       15
<PAGE>

affiliates  of BT since 1992,  served as a Director  of Kinetics  from June 1995
until the consummation of the Merger; and (vi) Jeffrey L. Ott, who has served in
several  capacities  at  affiliates  of BT since  1988,  served as a Director of
Kinetics from December 1996 until the consummation of the Merger.
    


                              PLAN OF DISTRIBUTION

         The Shares  offered  hereby may be sold from time to time by or for the
account of the  Selling  Stockholders  on one or more  exchanges  or  otherwise;
directly to  purchasers  in negotiated  transactions;  by or through  brokers or
dealers in ordinary brokerage  transactions or transactions in which a broker or
dealer  solicits  purchasers;  in block trades in which  brokers or dealers will
attempt  to sell  Shares as agent but may  position  and resell a portion of the
block as principal;  in  transactions  in which a broker or dealer  purchases as
principal for resale for its own account; or in any combination of the foregoing
methods.  Shares may be sold at a fixed offering price, which may be changed, at
the  prevailing  market  price at the time of sale,  at prices  related  to such
prevailing market price or at negotiated prices.  Brokers or dealers may arrange
for others to participate in any such  transaction and may receive  compensation
in the form of  discounts,  commissions  or  concessions  payable by the Company
and/or the purchasers of Shares. If required at the time that a particular offer
of Shares is made,  a  supplement  to this  Prospectus  will be  delivered  that
describes any material arrangements for the distribution of Shares and the terms
of the offering,  including,  without limitation, any discounts,  commissions or
concessions  and  other  items   constituting   compensation  from  the  Selling
Stockholders  or  otherwise.  The Company may agree to  indemnify  participating
brokers or dealers  against  certain civil  liabilities,  including  liabilities
under the Securities Act. The Company and the Selling Stockholders are obligated
to indemnify  each other  against  certain civil  liabilities  arising under the
Securities Act.

         The Selling  Stockholders  may not sell the Shares in the public market
unless  they  do  so by or  through  Donaldson,  Lufkin  &  Jenrette  Securities
Corporation,  Salomon  Smith Barney Inc.,  Deutsche  Morgan  Grenfell or BT Alex
Brown or another nationally  recognized  investment banking firm satisfactory to
the Company in its reasonable discretion, and, further, the Selling Stockholders
are obligated to sell the Shares in the public  market in an orderly  fashion as
will not be materially disruptive to the market for the Common Stock.

         The Selling  Stockholders and any such brokers or dealers may be deemed
to be  "underwriters"  within the meaning of the Securities  Act, in which event
any discounts,  commissions  or concessions  received by such brokers or dealers

                                       16
<PAGE>

and any profit on the resale of the Shares  purchased by such brokers or dealers
may be deemed to be  underwriting  commissions or discounts under the Securities
Act.

         The Company has informed the Selling  Stockholders  that the provisions
of  Regulation  M under the  Exchange Act may apply to their sales of Shares and
has  furnished  the Selling  Stockholders  with a copy of that  regulation.  The
Company  also has  advised  the  Selling  Stockholders  of the  requirement  for
delivery of a prospectus in connection with any sale of the Shares.

         Any Shares covered by this  Prospectus  which qualify for sale pursuant
to Rule 144 under the  Securities  Act may be sold under  Rule 144  rather  than
pursuant to this Prospectus. There is no assurance that the Selling Stockholders
will sell any or all of the  Shares.  The  Selling  Stockholders  may  transfer,
devise or gift such Shares by other means not described herein.

         The Company will pay all of the expenses  incurred in  connection  with
registration of the Shares,  including,  without  limitation,  all registration,
printing,  qualification  and filing fees and fees and  disbursements of counsel
for the Company ("Registration  Expenses").  All costs and expenses,  other than
Registration  Expenses,  including without limitation,  underwriting  discounts,
selling commissions and stock transfer taxes,  applicable to registration of the
Shares will be paid by the Selling Stockholders.


                          DESCRIPTION OF CAPITAL STOCK

GENERAL

         As of January 15, 1998, the Company was authorized to issue 300,000,000
shares of Common Stock,  par value $.01 per share, of which  105,979,930  shares
were issued and outstanding,  and 3,000,000 shares of preferred stock, par value
$.10 per share,  of which  none were  issued and  outstanding.  Of the  unissued
shares of Common  Stock,  7,636,364  shares  were  reserved  for  issuance  upon
conversion  of  the  Company's  6%  Convertible  Subordinated  Notes  due  2005,
10,481,013  shares were reserved for issuance  upon  conversion of the Company's
4-1/2% Convertible  Subordinated Notes due 2001,  1,200,000 shares were reserved
for issuance  upon exercise of the Warrants  expiring  September 17, 2007 and an
aggregate  of 1,455,539  shares were  reserved  for  issuance  upon  exercise of
options  either  outstanding  or available for grant under the  Company's  stock
option plans for employees and directors.

                                       17
<PAGE>

COMMON STOCK

         The  holders of Common  Stock are  entitled  to one vote for each share
held of record by them on all matters to be voted on by  stockholders.  There is
no  cumulative  voting with  respect to the  election of  directors;  thus,  the
holders of shares having more than 50% of the Company's  voting power (including
both common and voting  preferred  shares,  if any)  voting for the  election of
directors  can elect  all of the  directors.  The  holders  of Common  Stock are
entitled to receive dividends when, as and if declared by the Board of Directors
out of  funds  legally  available  therefor,  subject  to the  prior  rights  of
preferred stockholders.  In the event of liquidation,  dissolution or winding up
of the  Company's  affairs,  the holders of Common  Stock are  entitled to share
ratably in all assets remaining available for distribution to them after payment
of  liabilities  and  after  provision  has been  made for each  class of stock,
including any preferred stock, that has preference over the Common Stock. Except
as described  below under "Stock Purchase  Rights,"  holders of shares of Common
Stock, as such, have no conversion, preemptive or other subscription rights, and
there are no  redemption  or sinking fund  provisions  applicable  to the Common
Stock.

         The Company  currently  intends to retain earnings to provide funds for
the operation and expansion of its business and accordingly  does not anticipate
paying cash dividends on the Common Stock in the foreseeable future. Any payment
of cash  dividends  on the  Common  Stock in the  future  will  depend  upon the
Company's financial  condition,  earnings,  capital  requirements and such other
factors as the Board of Directors deems relevant.

PREFERRED STOCK

         Shares of preferred stock may be issued without  stockholder  approval.
The Board of Directors is  authorized to issue such shares in one or more series
and to fix the rights, preferences, privileges, qualifications,  limitations and
restrictions  thereof,  including dividend rights and rates,  conversion rights,
voting rights, terms of redemption,  redemption prices,  liquidation preferences
and the  number of shares  constituting  any series or the  designation  of such
series,  without  any vote or action by the  stockholders.  The  Company  has no
current plans for the issuance of any shares of preferred  stock.  Any preferred
stock to be issued could rank prior to the Common Stock with respect to dividend
rights and rights of liquidation.  The Board of Directors,  without  stockholder
approval, may issue preferred stock with voting and conversion rights that could
adversely  affect  the  voting  power of  holders  of  Common  Stock  or  create
impediments to persons seeking to gain control of the Company.


                                       18
<PAGE>

STOCK PURCHASE RIGHTS

   
         Laidlaw, which, as of January 15, 1998, held 3,646,783 shares of Common
Stock, or 3.4% of the outstanding  Common Stock,  has certain rights to purchase
voting  securities  of the Company in order to maintain  its  percentage  voting
interest.  Except in  connection  with mergers or other  acquisitions  or in the
ordinary course under an employee stock option or stock bonus plan, in the event
the Company proposes to sell or issue shares of voting  securities,  Laidlaw has
the right to purchase, on the same terms as the proposed sale or issuance,  that
number  of shares or rights as will  maintain  its  percentage  interest  in the
voting  securities of the Company,  assuming the  conversion of all  convertible
securities  and the exercise of all options and warrants  then  outstanding.  In
addition,  Laidlaw has other purchase  rights with respect to sales or issuances
of securities by the Company at prices below 85% of current  market price at the
time of sale or issuance or the prevailing  customary  price for such securities
or their equivalent.
    

CERTAIN VOTING ARRANGEMENTS

         Pursuant to the agreements whereby the Company acquired Smogless S.p.A.
in  September  1994,  Laidlaw has agreed to vote all shares  owned by it for the
nominees of the  Company's  Board for  election  to the Board,  and on all other
matters  in the same  proportion  as the votes  cast by other  holders of voting
securities,  other than those that relate to any business combination or similar
transaction  involving the Company or any amendment to the Company's Certificate
of Incorporation (the "Company Certificate") or By-laws.

   
         Pursuant to the agreement  whereby the Company  acquired the Properties
in exchange for  8,000,000  shares of Common Stock and the Warrants in September
1997,  the Company has agreed,  so long as the parties from whom the  Properties
were acquired (the "Parties") own at least 5% of the  outstanding  Common Stock,
to nominate a person designated by the Parties for election to the Company Board
(the  "Designee").  The  Designee,  Ardon E. Moore,  has been  appointed  by the
Company's  Board of Directors to serve as a Class I director until the Company's
Annual Meeting in 2000. If a vacancy occurs in the Company's  Board of Directors
while the Parties own at least 7 1/2% of the  outstanding  Common Stock and such
vacancy is the result of the  cessation to serve of a  non-employee  director of
the Company  (other than the  cessation of service of a Designee,  which vacancy
shall be filled with a successor  Designee),  the Parties  must also approve the
person  filling such vacancy.  In addition,  the Parties have agreed to vote all

                                       19
<PAGE>

shares  owned  by  them as  recommended  by a  majority  of the  members  of the
Company's  Board of  Directors,  except  with  respect  to  certain  fundamental
transactions, transactions involving the issuance by the Company of Common Stock
representing  20% or more of the  outstanding  Common Stock (or  equivalents) or
amendment of the Company Certificate or By-laws.
    

CERTAIN CHARTER AND BY-LAW PROVISIONS

         The  Company  Certificate  places  certain  restrictions  on the voting
rights of a "Related  Person,"  defined  therein as any person who  directly  or
indirectly owns 5% or more of the outstanding  voting stock of the Company.  The
founders  and the  original  directors  of the  Company  are  excluded  from the
definition  of  "Related  Persons,"  as are seven  named  individuals  including
Richard J. Heckmann,  the Chairman of the Board,  President and Chief  Executive
Officer of the  Company.  These  voting  restrictions  apply in two  situations.
First, the vote of a director who is also a Related Person is not counted in the
vote of the Board of  Directors  to call a meeting  of  stockholders  where that
meeting will consider a proposal made by the Related  Person  director.  Second,
any  amendments  to the Company  Certificate  that relate to specified  Articles
therein  (those  dealing  with  corporate  governance,  limitation  of  director
liability  or  amendments  to the  Company  Certificate),  in  addition to being
approved by the Board of Directors and a majority of the  Company's  outstanding
voting  stock,  must also be approved by either (i) a majority of directors  who
are not Related  Persons,  or (ii) the holders of at least 80% of the  Company's
outstanding  voting  stock,  provided  that if the change was  proposed by or on
behalf of a Related  Person,  then  approval by the holders of a majority of the
outstanding  voting  stock not held by  Related  Persons  is also  required.  In
addition,  any amendment to the Company's By-laws must be approved by one of the
methods specified in clauses (i) and (ii) in the preceding sentence.

         The Company  Certificate  and the  Company's  By-laws  provide that the
Board of Directors shall fix the number of directors and that the Board shall be
divided into three classes,  each consisting of one-third of the total number of
directors (or as nearly as may be possible). Stockholders may not take action by
written  consent.  Meetings of  stockholders  may be called only by the Board of
Directors (or by a majority of its members).  Stockholder  proposals,  including
director  nominations,  may be considered at a meeting only if written notice of
that  proposal is  delivered to the Company from 30 to 60 days in advance of the
meeting,  or within  ten days  after  notice of the  meeting  is first  given to
stockholders.

                                       20
<PAGE>

DELAWARE ANTI-TAKEOVER LAW

         Section 203 of the Delaware  General  Corporation  Law ("Section  203")
provides,  in  general,  that  a  stockholder  acquiring  more  than  15% of the
outstanding  voting  shares  of  a  corporation   subject  to  the  statute  (an
"Interested  Stockholder"),  but less than 85% of such shares, may not engage in
certain "Business Combinations" with the corporation for a period of three years
subsequent to the date on which the stockholder became an Interested Stockholder
unless (i) prior to such date the corporation's  board of directors has approved
either the Business  Combination  or the  transaction  in which the  stockholder
became an Interested Stockholder or (ii) the Business Combination is approved by
the  corporation's  board  of  directors  and  authorized  by a vote of at least
two-thirds of the  outstanding  voting stock of the corporation not owned by the
Interested Stockholder.

         Section 203 defines the term "Business Combination" to encompass a wide
variety of transactions with or caused by an Interested Stockholder in which the
Interested  Stockholder  receives or could receive a benefit on other than a pro
rata basis with other  stockholders,  including  mergers,  certain  asset sales,
certain   issuances  of  additional   shares  to  the  Interested   Stockholder,
transactions  with the corporation that increase the  proportionate  interest of
the Interested  Stockholder or transactions in which the Interested  Stockholder
receives certain other benefits.

         These  provisions  could  have the  effect of  delaying,  deferring  or
preventing a change of control of the Company.  The Company's  stockholders,  by
adopting an amendment to the Company  Certificate or the By-laws of the Company,
may elect not to be governed  by Section  203,  effective  twelve  months  after
adoption.  Neither  the  Company  Certificate  nor the  By-laws  of the  Company
currently excludes the Company from the restrictions imposed by Section 203.


                            VALIDITY OF COMMON STOCK

         The  validity  of the  Shares  will be passed  upon for the  Company by
Kirkpatrick & Lockhart LLP, counsel to the Company.


                                     EXPERTS

         The   consolidated   financial   statements  of  United  States  Filter
Corporation  and its  subsidiaries as of March 31, 1996 and 1997 and for each of
the three years in the period  ended March 31,  1997 have been  incorporated  by
reference herein and in the  registration  statement in reliance upon the report
of KPMG Peat Marwick LLP, independent certified public accountants, incorporated
by  reference  herein,  and  upon  the  authority  of said  firm as  experts  in
accounting and auditing.

         The consolidated  financial  statements of The Kinetics Group,  Inc. at
September  30, 1997 and 1996,  and for each of the two years in the period ended
September 30, 1997,  incorporated by reference herein have been audited by Ernst
& Young  LLP,  independent  auditors,  as set  forth  in  their  report  thereon
incorporated by reference  herein,  and are  incorporated by reference herein in
reliance  upon such report  given upon the  authority of such firm as experts in
accounting and auditing.

         The consolidated  financial statements of Memtec Limited as of June 30,
1997 and 1996 and for each of the three years in the period  ended June 30, 1997
incorporated  by  reference  herein have been so  incorporated  by  reference in
reliance on the report of Price Waterhouse,  independent  accountants,  given on
the authority of said firm as experts in auditing and accounting.



                                       22
<PAGE>

=======================================    =====================================

NO  PERSON  HAS  BEEN  AUTHORIZED
TO  GIVE  ANY  INFORMATION  OR  TO
MAKE  ANY REPRESENTATIONS OTHER
THAN THOSE CONTAINED IN THIS
PROSPECTUS,  AND, IF GIVEN OR
MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE
RELIED UPON AS HAVING BEEN
AUTHORIZED.  THIS  PROSPECTUS
DOES  NOT  CONSTITUTE  AN  OFFER  TO
SELL OR THE SOLICITATION  OF AN
OFFER TO BUY ANY  SECURITIES                   5,815,450 SHARES
OTHER THAN THE  SECURITIES  TO
WHICH IT RELATES OR AN OFFER TO
SELL OR THE SOLICITATION OF AN
OFFER TO BUY SUCH SECURITIES IN         UNITED STATES FILTER CORPORATION
ANY CIRCUMSTANCES IN WHICH SUCH
OFFER OR SOLICITATION IS
UNLAWFUL.  NEITHER THE DELIVERY                   COMMON STOCK
OF THIS PROSPECTUS NOR ANY SALE
MADE HEREUNDER SHALL, UNDER ANY
CIRCUMSTANCES, CREATE ANY
IMPLICATION THAT THERE HAS BEEN 
NO CHANGE IN THE AFFAIRS OF THE
COMPANY SINCE THE DATE HEREOF
OR THAT THE INFORMATION
CONTAINED HEREIN IS CORRECT AS
OF ANY TIME SUBSEQUENT TO ITS
DATE.

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

      TABLE OF CONTENTS
                                                     PROSPECTUS
                           PAGE
   
Available Information........ 2                 -------------------
Incorporation of Certain
Documents by Reference....... 2
The Company.................. 3
Risk Factors..................4
Use of Proceeds..............14
Selling Stockholders.........14
Plan of Distribution.........16
Description of Capital         
 Stock.......................17
Validity of Common Stock.....21
Experts......................21
    
                                                            , 1998
                                                 -----------
=======================================    =====================================


<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS
   

    

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

         (a)  Exhibits.  The  following  exhibits  are  filed  as  part  of this
registration statement:

EXHIBIT  
NUMBER          DESCRIPTION
- -------         -----------
   
5.01            Opinion  of Kirkpatrick & Lockhart LLP as to the legality of the
                securities being registered
23.01           Consent of Kirkpatrick & Lockhart LLP (included in Exhibit 5.01)
23.02           Consent of KPMG Peat Marwick LLP*
23.03           Consent of Ernst & Young LLP*
23.03           Consent of Price Waterhouse*

*               Previously filed.
    

   

    


                                     II - 1
<PAGE>

                                   SIGNATURES

   
         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant  has duly  caused  this  amendment  to be signed on its behalf by the
undersigned,  thereunto duly  authorized,  in the City of Palm Desert,  State of
California, on March 31, 1998.
    

                                           UNITED STATES FILTER CORPORATION

                                           By:  /s/ Richard J. Heckmann
                                                --------------------------------
                                                Richard J. Heckmann
                                                Chairman of the Board, President
                                                and Chief Executive Officer

   

    

   
         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
amendment has been signed by the following  persons in the capacities and on the
dates indicated.
    
<TABLE>
<CAPTION>
   
          Signature                           Capacity                            Date
          ---------                           --------                           -----

<S>                                   <C>                                    <C>

/s/ Richard J. Heckmann               Chairman of the Board, President       March 31, 1998
- ---------------------------------     and Chief Executive Officer
Richard J. Heckmann                   (Principal Executive Officer) and a
                                      Director

/s/ Kevin L. Spence                   Executive Vice President/Chief         March 31, 1998
- ---------------------------------     Financial Officer (Principal
Kevin L. Spence                       Financial and Accounting Officer)

           *                          Executive Vice President/Chief         March 31, 1998
- ---------------------------------     Administrative Officer and a
Michael J. Reardon                    Director

           *                          President/Chief Operating Officer -    March 31, 1998
- ---------------------------------     Process Water Group and a Director
Nicholas C. Memmo

           *                          Director                               March 31, 1998
- ---------------------------------
James E. Clark


<PAGE>
          Signature                           Capacity                            Date
          ---------                           --------                           -----

           *                          Director                               March 31, 1998
- ---------------------------------
John L. Diederich
                                      Director
- ---------------------------------
Robert S. Hillas

           *                          Director                               March 31, 1998
- ---------------------------------
Arthur B. Laffer

                                      Director
- ---------------------------------
Ardon E. Moore

           *                          Director                               March 31, 1998
- ---------------------------------
Alfred E. Osborne, Jr.

                                      Director
- ---------------------------------
J. Danforth Quayle

           *                          Director                               March 31, 1998
- ---------------------------------
C. Howard Wilkins, Jr.


*By:
/s/ Damian C. Georgino                                                       March 31, 1998
- ----------------------
Damian C. Georgino
Attorney-in-Fact
    
</TABLE>

<PAGE>


                                  EXHIBIT INDEX



EXHIBIT                                                        SEQUENTIAL PAGE
 NUMBER               DESCRIPTIO                                    NUMBER
- -------               -----------                              ---------------
   
   5.01     Opinion of Kirkpatrick & Lockhart
            LLP as to the legality of the
            securities being registered
  23.01     Consent of Kirkpatrick & Lockhart
            LLP (included in Exhibit 5.01)
    




                                                                    Exhibit 5.01


                                  April 1, 1998


United States Filter Corporation
40-004 Cook Street
Palm Desert, California 92211

Ladies and Gentlemen:

   
      We have acted as counsel to United States Filter  Corporation,  a Delaware
corporation   (the  "Company")  in  connection  with  Amendment  No.  1  to  the
Registration Statement on Form S-3 (the "Amended Registration Statement"), filed
by the  Company on April 1, 1998 with the  Securities  and  Exchange  Commission
pursuant  to the  Securities  Act of 1933,  as amended,  with  respect to (i) an
aggregate of  5,803,803  shares (the "Merger  Shares") of the  Company's  Common
Stock,  par  value  $.01 per share  ("Common  Stock"),  that were  issued by the
Company pursuant to the Merger Agreement dated as of December 31, 1997 among the
Company, The Kinetics Group, Inc., U.S. Filter/KG  Acquisition Corp., The Bianco
Family  1991 Trust,  Dated  February  1, 1991,  David J.  Shimmon and BT Capital
Partners,  Inc. (the "Merger  Agreement") and (ii) an aggregate of 11,647 shares
of the Common Stock that may be issued upon exercise of options (the  "Options")
which were  converted in accordance  with the Merger  Agreement  from options to
purchase shares of Kinetics Common Stock (the "Option Shares").
    
   
      We are familiar with the Amended Registration  Statement and have reviewed
the Company's  Certificate  of  Incorporation  and By-laws,  each as amended and
restated.  We have also  examined  such other  public and  corporate  documents,
certificates,  instruments and corporate records,  and such questions of law, as
we have deemed  necessary  for purposes of  expressing an opinion on the matters
hereinafter set forth. In all  examinations of documents,  instruments and other
papers,  we have  assumed the  genuineness  of all  signatures  on original  and
certified  documents and the  conformity to original and certified  documents of
all copies submitted to us as conformed, photostatic or other copies.
    

      On the  basis of the  foregoing,  we are of the  opinion  that the  Merger
Shares are, and the Option Shares,  when issued in accordance  with the terms of
the Options, will be, validly issued, fully paid and non-assessable.

   
      We consent to the filing of this  opinion as Exhibit  5.01 to the  Amended
Registration  Statement and to the use of our name in the  Prospectus  forming a
part thereof under the caption "Legal Matters."
    

                                    Yours truly,



                                     /s/ Kirkpatrick & Lockhart LLP



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