AMTROL INC /RI/
SC 13D/A, 1996-09-09
FABRICATED PLATE WORK (BOILER SHOPS)
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<PAGE>   1
                                  SCHEDULE 13D



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13D


                    Under the Securities Exchange Act of 1934
                               (Amendment No. __)


                                   AMTROL Inc.
                                   -----------
                                (Name of Issuer)


                     Common Stock, Par Value $.01 Per Share
                     --------------------------------------
                         (Title of Class of securities)


                                   03234A-10-9
                                   -----------
                                 (CUSIP Number)


                               Margaret D. Farrell
                            Hinckley, Allen & Snyder
                                1500 Fleet Center
                         Providence, Rhode Island 02903
                                 (401) 274-2000

                        ---------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)


                                 August 28, 1996
                                 ---------------
             (Date of Event Which Requires filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of rule 13d-1(b)(3) or (4), check the following box.  X .
                                                                      ---

Check the following box if a fee is being paid with the statement ____.



                              CUSIP NO. 03234A-10-9
                               Page 1 of 16 Pages


<PAGE>   2
                                  SCHEDULE 13D


      1)     Name of Reporting Person.  Kenneth L. Kirk
                                      -----------------------------------------

      2)     Check the appropriate box if a Member of a Group (See Instructions)

      (a)
             ------------------
      (b)           X
             ------------------

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

      3)     SEC Use Only

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

      4)     Source of Funds (See Instructions).      Not Applicable
                                                 -------------------------------

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

      5)     Check if Disclosure of Legal Proceedings is Required Pursuant to 
Item 2(d) or 2(e).
                   -------------------------------------------------------------

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

      6)     Citizenship or Place of Organization.      United States
                                                  ------------------------------

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

Number of            (7)    Sole Voting Power          443,325
                                              ----------------------------------
Shares Bene-         -----------------------------------------------------------
                     (8)    Shared Voting Power        0
ficially Owned                                  --------------------------------
                     -----------------------------------------------------------
By Each              (9)    Sole Dispositive Power     443,325
                                                   -----------------------------
Reporting            -----------------------------------------------------------
                     (10)   Shared Dispositive Power   0
Person With                                          ---------------------------

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

      11)    Aggregate Amount Beneficially Owned by Each Reporting Person.

                           443,325
- - --------------------------------------------------------------------------------

      12)    Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions).                      Not Applicable
                    ------------------------------------------------------------

      13)    Percent of Class Represented by Amount in Row 11.      5.93%
                                                               -----------------

      14)    Type of Reporting Person (See Instructions).           IN
                                                          ----------------------



                              CUSIP NO. 03234A-10-9
                               Page 2 of 16 Pages
<PAGE>   3

                                  SCHEDULE 13D


       This statement is filed by Kenneth L. Kirk pursuant to Rule 13d-1(b)
under the Securities Exchange Act of 1934, as amended, as an amendment to the
Schedule 13G dated February 10, 1994 relating to the Common Stock, par value
$.01 per share of AMTROL Inc., filed on February 12, 1994, as amended by
Amendment No. 1 thereto dated February 7, 1995 filed on February 8, 1995, as
amended by Amendment No. 2 thereto dated February 12, 1996 filed February 13,
1996.

       Item 1.  Security and Issuer.
                -------------------

       This statement relates to the shares of Common Stock, par value $.01 per
share (the "Common Stock"), of AMTROL Inc., a Rhode Island corporation ("AMTROL"
or the "Issuer"). The address of AMTROL's principal executive office is 1400
Division Road, West Warwick, Rhode Island 02893.

       Item 2.  Identity and Background.
                -----------------------

       (a), (b), (c) and (f). This filing is being made by Kenneth L. Kirk. Mr.
Kirk's principal place of business is 1400 Division Road, West Warwick, Rhode
Island 02893. Mr. Kirk is Chairman of the Board of AMTROL whose principal
address is set forth in Item 1 above.  Mr. Kirk is a United States citizen.

       (d) and (e). During the last five years, Mr. Kirk has not been: (i)
convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors); or (ii) a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining future
violations of, prohibiting or mandating activities subject to, federal or state
securities laws or finding any violation with respect to such laws.

       Item 3.  Source and Amount of Funds or Other Consideration.
                -------------------------------------------------

       Mr. Kirk acquired his shares of AMTROL Common Stock in a series of
transactions prior to 1990 for services and/or cash.

       Item 4.  Purpose of Transaction.
                ----------------------

       Other than as may be described herein, Mr. Kirk has no plans or proposals
which relate to or would result in:

       (1) any extraordinary corporate transaction, such as a merger,
       reorganization or liquidation, involving the Issuer or any of it
       subsidiaries;

       (2) any sale or transfer of a material amount of assets of the Issuer or
       any of its subsidiaries;


                              CUSIP NO. 03234A-10-9
                               Page 3 of 16 Pages
<PAGE>   4
                                  SCHEDULE 13D


       (3) any change in the present board of directors or management of the
       Issuer, including any plans or proposals to change the number or term of
       directors or to fill any existing vacancies on the board;

       (4) any material change in the present capitalization or dividend policy
       of the Issuer;

       (5) any other material change in the Issuer's business or corporate
       structure;

       (6) any change in the Issuer's charter, bylaws or instruments
       corresponding thereto or other actions which may impede the acquisition
       of control of the Issuer by any person;

       (7) causing the Common Stock of the Issuer to be delisted from a national
       securities exchange or to cease to be authorized to be quoted in an
       inter-dealer quotation system of a registered national securities
       association;

       (8) causing a class of equity transactions of the Issuer to become
       eligible for termination of registration pursuant to Section 12(g)(4) of
       the Securities Exchange Act of 1934; or

       (9) any action similar to any of those enumerated above.

       On August 28, 1996, Mr. Kirk and three other stockholders of the Issuer
(each a "Stockholder") entered into a Voting Agreement (the "Voting Agreement")
with the Issuer. The Voting Agreement provides that the obligations of each
Stockholder thereunder are several and not joint and that, while, for the sake
of convenience, the Voting Agreement was entered into by more than one
Stockholder, the Voting Agreement shall be treated for all purposes as a
separate agreement between each Stockholder and the Issuer and not as an
agreement among the Stockholders, and that no Stockholder shall have any right
under the Voting Agreement to cause any other Stockholder to take any action
required thereunder.

       Under the Voting Agreement, each Stockholder agreed to vote all of the
shares of the Issuer's Common Stock which the Stockholder has the power to vote
as recommended by the Board of Directors (the "Board") of the Issuer in regard
to (i) a definitive merger agreement (the "Merger Agreement"), which the Issuer
expected to enter into with one of several bidders with whom the Issuer was
engaged in discussions (the "Bidder") determined by the Board to have made a
proposal for the acquisition of the Issuer that the Board determined to be in
the best interest of the Issuer and its stockholders; and (ii) any competing
transaction or other action which is intended or could reasonably be expected to
have a material effect on the transactions contemplated by any such Merger
Agreement; provided that no Stockholder is obligated under the Voting Agreement
to vote in favor of any proposal that would modify the provisions of Section D
of Article 6 of the Issuer's Articles of Incorporation 


                              CUSIP NO. 03234A-10-9
                               Page 4 of 16 Pages
<PAGE>   5
                                  SCHEDULE 13D


except to the extent necessary to make such provisions inapplicable to the
approval by the Issuer's stockholders of such Merger Agreement.

       In addition, each Stockholder agreed not to solicit or respond to any
inquiry or proposal with respect to the Issuer that constitutes or could
reasonably be expected to lead to a competing transaction to the transactions
contemplated by the Merger Agreement.

       Each Stockholder also agreed not to offer for sale, sell, transfer,
pledge or otherwise dispose of any shares of the Issuer's Common Stock except
pursuant to a transfer in which the transferred shares continue to be bound by
the provisions of the Voting Agreement. In addition, each Stockholder agreed not
to grant any proxies, except for any proxies solicited by the Board, or to enter
into any other form of voting agreement with respect to any shares of the
Issuer's Common Stock held by such Stockholder. The Chester H. Kirk Trust (the
"Trust"), a Stockholder party to the Voting Agreement, however, is permitted
under the Agreement to pledge its shares as collateral for any loan which the
Trustees of the Trust may deem necessary or desirable in connection with payment
of any and all state and federal estate taxes occasioned by the death of Chester
H. Kirk, pecuniary legacies under the Last Will and Testament of Chester H. Kirk
or pecuniary distributions under the Chester H. Kirk 1984 Trust Agreement, so
long as the amount of such loan does not exceed $10 million prior to January 31,
1997 or $20 million thereafter, and that the terms of such loan provide that the
Trust may continue to vote all pledged shares so long as the Trust is not in
default under the loan documents.

       The Voting Agreement provides that each Stockholder is entering into the
Voting Agreement for the benefit of any Bidder with whom the Issuer may reach a
Merger Agreement and that any such Bidder shall be a third party beneficiary for
purposes of monetary damages with respect to any breach of the Voting Agreement
by such Stockholder.

       The obligations of each Stockholder under the Agreement were conditioned
on such Stockholder's approval, prior to the execution or delivery by the
Issuer, of the final form of such Merger Agreement.

       On August 28, 1996, the Issuer entered into a definitive Merger Agreement
with A.I. Holdings, Inc. and A.I. Acquisition, Inc. Immediately prior thereto,
each of the Stockholders approved the form of Merger Agreement, as required by
the Voting Agreement.

       The Voting Agreement terminates on the earlier to occur of the effective
time of the merger contemplated by the Merger Agreement or February 28, 1997.


                              CUSIP NO. 03234A-10-9
                               Page 5 of 16 Pages
<PAGE>   6
                                  SCHEDULE 13D



       Item 5.  Interest in Securities of the Issuer.
                ------------------------------------

       (a)  AMOUNT BENEFICIALLY OWNED.  As of August 28, 1996, Mr. Kirk 
beneficially owned 443,325 shares of a total of 7,463,470a shares of Common
Stock outstanding on such date.

       (b)  PERCENT OF CLASS.  The shares of Common Stock beneficially owned by 
Mr. Kirk represent 5.93% of the Issuer's outstanding Common Stock.b

       (c)  Number of Shares of Common Stock as to which Mr. Kirk has:

            (i)   sole power to vote or to direct the vote  443,325 
                                                            -------
            (ii)  shared power to vote or to direct the vote    0 
                                                             -------
            (iii) sole power to dispose or to direct the disposition of 443,325
                                                                        -------
            (iv)  shared power to dispose or to direct the disposition of   0
                                                                          -----

       (d)  Mr. Kirk has not effected any transaction in the Common Stock during
the past 60 days.

       (e)  Not applicable.

       (f)  Not applicable.

       Item 6.   Contracts, Arrangements, Understandings or Relationships with
                 -------------------------------------------------------------
Respect to Securities of the Issuer.
- - -----------------------------------

       Except as described herein and in Items 4 and 5 of this Schedule 13D,
there are no contracts, arrangements, understandings, or relationships (legal or
otherwise) among the persons named or referred to in Item 2 or between such
person and any person with respect to any securities of AMTROL.

       Item 7.  Material to be Filed as Exhibits.
                --------------------------------

       (1)  Voting Agreement dated as of August 1996 among AMTROL Inc., Chester 
H. Kirk Trust, Kenneth L. Kirk, Hanns H. Winkhaus and David Beretta.




- - ----------------------------
a  Includes 7,444,220 shares outstanding on August 28, 1996, plus 19,250 shares
   acquirable by Mr. Kirk under options exercisable by Mr. Kirk as of August 26,
   1996.

b  The 443,325 shares of Common Stock beneficially owned by Mr. Kirk include
   19,250 shares issuable upon exercise of options granted to Mr. Kirk under
   AMTROL 1992 Stock Plan.


                              CUSIP NO. 03234A-10-9
                               Page 6 of 16 Pages
<PAGE>   7
                                  SCHEDULE 13D


                                   SIGNATURES
                                   ----------


       After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


                                                /s/ Kenneth L. Kirk
                                                --------------------------------
                                                Kenneth L. Kirk


Dated:  September 6, 1996


                              CUSIP NO. 03234A-10-9
                               Page 7 of 16 Pages

<PAGE>   1
                                  SCHEDULE 13D


                                                                    EXHIBIT (1)
                                                                    ------------

                                VOTING AGREEMENT
                                ----------------

     This Agreement dated as of August 28, 1996 is by and between Amtrol Inc.
(the "Company"), a Rhode Island corporation, and the other parties signatory
hereto (each a "Stockholder").

RECITALS

     The Company's Board of Directors (the "Board") determined in 1995 that it
was in the best interest of the Company and its stockholders to explore
strategic options, including a possible sale of the Company.

     To assist in this process, the Company retained investment bankers and
other advisors and conducted an extensive and lengthy process of soliciting and
evaluating proposals from numerous parties. This process has now resulted in the
Company obtaining from a small number of qualified bidders (the "Bidders")
specific proposals to acquire the Company, copies of which have been provided by
the Company to the Stockholders.

     Following further negotiations, the Company expects to enter into a
definitive agreement (the "Merger Agreement") with the Bidder determined by the
Board, in the exercise of the fiduciary duty of the Board to the Company's
stockholders, following consultation with the Board's financial and other
advisors, to have made the proposal which is in the best interest of the Company
and its stockholders.

     In response to requests from Bidders, the Company has requested the
Stockholders to enter into this Agreement. The Company has informed the
Stockholders that, without this Agreement, one or more of such Bidders will
refuse to enter into a Merger Agreement. In this regard, the Company believes
that the existence of this Agreement will increase the consideration which all
stockholders of the Company will receive under the Merger Agreement.

     The Stockholders have considered the Company's request in light of the
process engaged in by the Company to date in seeking such proposals, the
Company's belief that by entering into this Agreement the Stockholders may
increase both the willingness of the Bidders to proceed and the amount of
consideration ultimately to be paid, and, in particular, where applicable, such
Stockholder's own fiduciary obligations, and are willing to agree with the
Company as follows. Each Stockholder acknowledges that such Stockholder is
entering into this Agreement in part for the benefit of the Bidder with whom the
Company reaches a Merger 


                              CUSIP NO. 03234A-10-9
                               Page 8 of 16 Pages
<PAGE>   2
                                  SCHEDULE 13D


Agreement.

AGREEMENT

     The parties therefore agree as follows:

     1.   STOCKHOLDER REPRESENTATIONS.  Each Stockholder (severally and not 
jointly) represents and warrants to the Company as follows:

     a.   Stockholder is the record holder of the number of shares of the
          Company's Common Stock set forth opposite Stockholder's name on
          Exhibit A attached hereto (the "Existing Shares," and together with
          any shares of the Company's Common Stock acquired by Stockholder after
          the date hereof and prior to the termination hereof, whether upon
          exercise of options, conversion of convertible securities, purchase,
          exchange or otherwise, the "Shares").

     b.   On the date hereof, the Existing Shares constitute all of the shares
          of the Company's Common Stock owned of record by Stockholder.

     c.   Stockholder has sole voting power with respect to the matters set
          forth in Section 2 hereof with respect to all of such Stockholder's
          Existing Shares and sole power to dispose of all such Existing Shares.

     d.   Stockholder has the legal capacity, power and authority to enter into
          and perform all of Stockholder's obligations under this Agreement. The
          execution, delivery and performance of this Agreement by Stockholder
          will not violate any other agreement to which Stockholder is a party
          or by which Stockholder is bound. In the case of any Stockholder which
          is a trust, there is no beneficiary of such trust and no holder of any
          voting trust certificate or similar instrument in such trust whose
          consent is required for the execution and delivery of this Agreement
          or the consummation of the transactions contemplated hereby.

     2.   AGREEMENT TO VOTE.  Each Stockholder agrees to vote all of such 
Stockholder's Existing Shares and any other Shares which Stockholder has the
power to vote in regard to any and all of the following matters as recommended
by the Board:

     a.   The Merger Agreement itself and all transactions contemplated thereby;
          and


                              CUSIP NO. 03234A-10-9
                               Page 9 of 16 Pages
<PAGE>   3
                                  SCHEDULE 13D


     b.   Any Competing Transaction (as such term is defined in the form of
          Merger Agreement) or other action which is intended to or could
          reasonably be expected to have a material effect on the transactions
          contemplated by the Merger Agreement;

PROVIDED, HOWEVER, that no Stockholder shall be obligated to vote in favor of
any proposal that would modify the provisions of Section D of Article Sixth of
the Company's Articles of Incorporation except to the extent necessary to make
such provisions inapplicable to the approval by the Company's stockholders of
the Merger Agreement (as approved by such Stockholder pursuant to Section 6
hereof) and the Merger as defined therein. No Stockholder shall enter into any
agreement or understanding with any person or entity to vote or give
instructions in any manner inconsistent with the provisions of this section.

     3.   NO SOLICITATION. No Stockholder shall, directly or indirectly 
(including through advisors or other intermediaries), solicit (including by way
of furnishing information) or respond to any inquiry or proposal by any person
or entity with respect to the Company that constitutes or could reasonably be
expected to lead to a Competing Transaction. If any Stockholder receives any
such inquiry or proposal, then such Stockholder shall promptly inform the
Company of the terms and conditions, if any, of such inquiry or proposal and the
identity of the person making it. Each Stockholder will immediately cease and
cause to be terminated all existing activities, discussions or negotiations (if
any) with any party conducted heretofore with respect to any of the foregoing.

     4.   RESTRICTION ON TRANSFER.  No Stockholder shall, directly or 
indirectly:

     a.   Except pursuant to the terms of this Agreement, offer for sale, sell,
          transfer, tender, pledge, encumber, assign or otherwise dispose of,
          enforce or permit the execution of the provisions of any redemption
          agreement with the Company or enter into any contract, option or other
          arrangement or understanding with respect to or consent to the offer
          for sale, transfer, tender, pledge, encumbrance, assignment or other
          disposition of, any or all of such Stockholder's Shares or any
          interest therein, except pursuant to any such transfer in which the
          transferee becomes a signatory to this Agreement and any Shares
          transferred to such transferee continue to be bound by the provisions
          hereof (without limiting the generality of the foregoing, no
          Stockholder shall (i) exercise any right which such



                              CUSIP NO. 03234A-10-9
                               Page 10 of 16 Pages
<PAGE>   4
                                  SCHEDULE 13D



          Stockholder may have to demand or request that the Company file a
          Registration Statement under the Securities Act of 1933 covering the
          sale of any Shares or (ii) if such Stockholder is a trust, take any
          action to terminate, close or liquidate such trust unless all Shares
          affected by such action remain subject in all respects to the terms of
          this Agreement);

     b.   Grant any proxies (except for any proxy solicited by the Board) or
          powers of attorney, deposit any Shares into a voting trust or enter
          into a voting agreement with respect to any Shares; or

     c.   Take any action which would make any representation or warranty of
          such Stockholder contained herein untrue or incorrect or have the
          effect of preventing or disabling such Stockholder from performing
          such Stockholder's obligations under this Agreement.

Notwithstanding any other provision of this section, the Trustees of The Chester
H. Kirk 1984 Trust Agreement shall be permitted to pledge its Shares as
collateral for any loan from a bona fide financial institution which such
Trustees may deem necessary or desirable in connection with the payment of (i)
any and all state or federal estate taxes occasioned by the death of Chester H.
Kirk, (ii) pecuniary legacies under the Last Will and Testament of Chester H.
Kirk or (iii) pecuniary distributions under the Chester H. Kirk 1984 Trust
Agreement, the amount of such loan not to exceed $10 million prior to January
31, 1997 or $20 million thereafter, and the terms of such loan to provide that
the Trust may continue to vote all pledged Shares so long as the Trust is not in
default under the loan documents.

     5.   TERMINATION.  This Agreement shall terminate on the earliest to occur 
of the following:

     a.   The failure by the Company to reach a definitive Merger Agreement with
          one of the Bidders on or before September 15, 1996;

     b.   The Effective Time of any such Merger Agreement (as defined therein);
          or

     c.   February 28, 1997.

     6.   CONDITION TO STOCKHOLDERS' OBLIGATIONS. The obligations of each
Stockholder hereunder are conditioned on such Stockholder's written approval,
prior to execution and delivery by the Company, of the final form of Merger
Agreement and the consideration payable thereunder, it being understood and
agreed 


                              CUSIP NO. 03234A-10-9
                               Page 11 of 16 Pages
<PAGE>   5
                                  SCHEDULE 13D


that, among other provisions, such Agreement will contain appropriate
"fiduciary-out" provisions in favor of the Board.

     7.   MISCELLANEOUS.

     a.   This Agreement constitutes the entire agreement between the parties
          with respect to the subject matter hereof and supersedes all other
          prior agreements and understandings (if any), both written and oral,
          between the parties with respect to the subject matter hereof, and
          shall not be assigned by operation of law or otherwise.

     b.   This Agreement may not be modified, amended, altered or supplemented,
          except upon the execution and delivery of a written agreement executed
          by the parties hereto, provided that the Company may add to the list
          of Stockholders any stockholder of the Company who agrees to be bound
          by the terms of this Agreement without the agreement of any other
          party hereto, and thereafter such added stockholder shall be treated
          as a "Stockholder" for all purposes of this Agreement.

     c.   All notices, requests, claims, demands and other communications
          hereunder shall be in writing and shall be given (and shall be deemed
          to have been duly received if so given) by hand delivery, telegram,
          telex or telecopy, or by mail (registered or certified, postage
          pre-paid, return receipt requested) or by any courier service, such as
          Federal Express providing proof of delivery. All communications
          hereunder shall be delivered to the respective parties at the
          following addresses:

               AMTROL, INC.
               1400 Division Road
               West Warwick, Rhode Island 02893

          with a copy to:

               HINCKLEY, ALLEN & SNYDER
               c/o Margaret Farrell, Esq.
               1500 Fleet Center
               Providence, Rhode Island 02903

               THE CHESTER H. KIRK 1984 TRUST AGREEMENT
               c/o Heidi Kirk
               275 Stony Lane
               North Kingstown, Rhode Island 02852



                              CUSIP NO. 03234A-10-9
                               Page 12 of 16 Pages
<PAGE>   6
                                  SCHEDULE 13D

          with copies to:

               FLEET NATIONAL BANK
               c/o Terence J. Breiding, Senior Vice President
                     Manager Estate and Trust Services
               Mail Stop RI MO 124
               100 Westminster Street
               Providence, Rhode Island 02903-2305

          and

               ROPES & GRAY
               c/o Martin Hall, Esq.
               One International Place
               Boston, Massachusetts 02110

               DAVID BERETTA
               11 Walcot Avenue
               Jamestown, Rhode Island 02835

               KENNETH L. KIRK
               1400 Division Road
               West Warwick, Rhode Island 02893

               DR. HANNS H. WINKHAUS
               Sybelstrasse 24B
               40239 Dusseldorf
               Germany

          or to such other address as the person to whom notice is given may
          have previously furnished to the others in writing in the manner set
          forth above.

     d.   This Agreement shall be governed by and construed in accordance with
          the laws of the State of Rhode Island, regardless of the laws which
          might otherwise govern under the applicable conflicts of laws
          principles thereof.

     e.   This Agreement may be executed in two or more counterparts, each of
          which shall be deemed to be an original, but all of which shall
          constitute one and the same Agreement.

     f.   The descriptive headings used herein are inserted for convenience of
          reference only and are not intended to be part of or to affect the
          meaning or interpretation of this Agreement.

     g.   In the event of a stock dividend or distribution, or 



                              CUSIP NO. 03234A-10-9
                               Page 13 of 16 Pages
<PAGE>   7
                                  SCHEDULE 13D

          any change in the Company's Common Stock by reason of a stock
          dividend, split-up, recapitalization, combination, exchange of shares
          or the like, the term "Shares" shall be deemed to refer to and include
          the Shares as well as all such stock dividends and distributions in
          any Shares or for which any or all of the Shares may be changed or
          exchanged.

     h.   The obligations of each Stockholder hereunder are several and not
          joint and no Stockholder shall have any liability hereunder to the
          Company for the failure of any other Stockholder to perform his or its
          obligations hereunder. While, for the sake of convenience, this
          Agreement has been entered into by more than one Stockholder, this
          Agreement shall be treated for all purposes as a separate agreement
          between each Stockholder and the Company and not as an agreement among
          the Stockholders, and no Stockholder shall have any rights hereunder
          to cause any other Stockholder to take any action required hereunder.

     i.   Each Stockholder acknowledges that each Stockholder is entering into
          this Agreement for the benefit of the Bidder with whom the Company
          reaches a Merger Agreement and that such Bidder shall be a third party
          beneficiary for purposes of monetary damages with respect to any
          breach hereof by such Stockholder.



                              CUSIP NO. 03234A-10-9
                               Page 14 of 16 Pages
<PAGE>   8
                                  SCHEDULE 13D

     IN WITNESS WHEREOF, the Company and each Stockholder have caused this
Agreement to be duly executed as of the day and year first set forth above.

                                             AMTROL INC.
               
               
                                             By:/s/ Kenneth L. Kirk
                                                -------------------
                                                 Name:  Kenneth L. Kirk
                                                 Title:  Chairman
               
                                             THE CHESTER H. KIRK 1984 TRUST 
                                             AGREEMENT
               
               
                                             By:/s/ Heidi H. Kirk
                                                -----------------
                                                 Name:  Heidi H. Kirk
                                                 Title:  Co-Trustee
               
               
                                             By:/s/ Hanns H. Winkhaus
                                                ---------------------
                                                 Name: Hanns H. Winkhaus
                                                 Title:  Co-Trustee
               
                                             By:  Fleet National Bank
                                                    Title: Co-Trustee
               
                                                 By:/s/ Terence J. Breiding
                                                    -----------------------
                                                 Name: Terence J. Breiding
                                                 Title: Senior Vice President
               
               
                                             /s/ Kenneth L. Kirk
                                             -------------------
                                             Kenneth L. Kirk
               
               
                                             /s/ David L. Beretta
                                             --------------------
                                             David L. Beretta
               
                                             /s/ Hanns H. Winkhaus
                                             ---------------------
                                             Hanns H. Winkhaus
               
               
               
                              CUSIP NO. 03234A-10-9
                               Page 15 of 16 Pages
<PAGE>   9
                                  SCHEDULE 13D




                                                                       Exhibit A

<TABLE>
                                  STOCKHOLDERS
                                  ------------
<CAPTION>

                                        Number of Shares of Which the
Name                                    Stockholder is the Record Holder
- - ----                                    --------------------------------

<S>                                     <C>      
The Chester H. Kirk 1984
Trust Agreement                         2,220,804

Kenneth L. Kirk                           424,075

David Beretta                              68,046

Hanns H. Winkhaus                          99,950
</TABLE>




                              CUSIP NO. 03234A-10-9
                               Page 16 of 16 Pages



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