Document:

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                                                                 EXHIBIT 10.34

                         THIRTEENTH AMENDMENT AND WAIVER

                                       TO

                      AMENDED AND RESTATED CREDIT AGREEMENT

                  THIS THIRTEENTH AMENDMENT AND WAIVER TO AMENDED AND RESTATED
CREDIT AGREEMENT (the "AGREEMENT") is being executed and delivered as of
December 20, 2001, by and among Waterlink, Inc., a Delaware corporation (the
"COMPANY"), the "Banks" party to and as defined in the "Credit Agreement"
referred to below (the "BANKS") and Bank of America, N.A. in its capacities as
"Agent" for the Banks under the Credit Agreement and "Collateral Agent" for the
Banks pursuant to the Collateral Documents (the "AGENT"). Capitalized terms used
herein and not defined herein shall have the meanings ascribed to such terms as
set forth in the Credit Agreement referred to and defined below.

                              W I T N E S S E T H:

                  WHEREAS, the Company, the Banks and the Agent are parties to
that certain Amended and Restated Credit Agreement dated as of June 27, 1997, as
amended and restated as of February 11, 2000, as further amended (the "CREDIT
AGREEMENT"), pursuant to which the Banks have agreed, subject to the terms and
conditions set forth therein, to extend credit to the Company;

                  WHEREAS, the Company has (i) failed to make the Scheduled
Repayment of principal due and payable with respect to the Term Loans on
November 30, 2001 resulting in an Event of Default under SECTION 9.01(a) of the
Credit Agreement and (ii) failed to cause to be executed and delivered on or
before November 30, 2001 blocked account and lockbox account agreements with
respect to certain of its deposit account maintained for its Pure Water business
unit as required by SECTION 7.14(e) resulting in an Event of Default under
SECTION 9.01(c) (collectively, the "EXISTING DEFAULTS"); and

                  WHEREAS, the Company has requested that the Banks waive the
Existing Defaults and amend the remaining Scheduled Repayments to provide for
the later payment of the Company's delinquent installment and, subject to the
terms and conditions of this Agreement, the Banks have agreed to such requests.

                  NOW, THEREFORE, in consideration of the foregoing premises,
the terms and conditions stated herein and other valuable consideration, the
receipt and sufficiency of which is hereby acknowledged by the Company, the
Banks and the Agent, such parties hereby agree as follows:

                  SECTION 1. AMENDMENT TO CREDIT AGREEMENT. Subject to the
satisfaction of each of the conditions set forth in SECTION 3 of this Agreement,
the Credit Agreement is hereby amended as follows (unless otherwise specified,
section references refer to sections of the Credit Agreement):

<PAGE>

                  (a) SECTION 2.10(a)(i) is deleted in its entirety and replaced
with the following provision:

         On each date set forth below, the Company shall be required to repay
         the principal amount (or such other amount after giving effect to any
         prepayments permitted or required pursuant to this Agreement) of the
         Term Loans as is set forth opposite such date (each, a "Scheduled
         Repayment"):

                                    Date                          Amount
                                    ----                          ------

                           December 31, 2001                      $100,000
                           Term Maturity Date                $13,017,250.06

                  (b) SECTION 7.14(e) is deleted in its entirety and replaced
with the following provision:

                           (e) On or before June 15, 2001, the Company will
         execute and deliver, and cause to be executed and delivered, in favor
         of the Agent and the Banks, blocked account and lockbox account
         agreements, in form and substance acceptable to the Agent, with respect
         to each depository, collection and concentration account maintained by
         the Company and each of the Domestic Subsidiaries (other than those
         accounts maintained by Domestic Subsidiaries comprising the Company's
         Pure Water business unit (as to which accounts the Company shall use
         all reasonable efforts to promptly obtain such agreements and in any
         event on or before December 31, 2001 and, to the extent such efforts
         are unsuccessful, the Company shall close such accounts and replace
         them with accounts located at one or more other institutions which
         execute and deliver such blocked accounts and lockbox agreements on or
         before January 15, 2002) and other than those determined by the Agent
         to be immaterial), pursuant to which the Agent would have the right,
         following the occurrence and during the continuation of any Event of
         Default, to require that all collections received by the depositories
         with respect to such accounts shall be maintained in such accounts or
         transferred (on a daily basis) to the Agent, for application to Loans,
         L/C Obligations and other obligations of the Company or the Domestic
         Subsidiaries pursuant to this Agreement or the other Loan Documents, in
         any such case pursuant to the Agent's exclusive instructions.

                  SECTION 2. WAIVER. Subject to the satisfaction of the
conditions set forth in SECTION 3 of this Agreement, the Banks hereby waive the
Existing Defaults.

                  SECTION 3. EFFECTIVENESS OF THE AMENDMENT AND WAIVER;
CONDITIONS PRECEDENT. The provisions of SECTIONS 1 and 2 of this Agreement shall
become effective as of the date hereof upon the Agent's receipt of each of the
following:

                  (a) originally-executed (or facsimiles of originally-executed)
         counterparts of this Agreement executed and delivered by duly
         authorized officers of the Company, each Guarantor and each of the
         Banks; and

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                  (b) payment in full of the fees and expenses described in
         SECTION 6(c) hereof, to the extent invoices with respect thereto are
         delivered to the Company prior to the satisfaction of the other
         conditions described in this section.

                  SECTION 4. REPRESENTATIONS AND WARRANTIES. The Company and
each Guarantor hereby represents and warrants that (a) this Agreement
constitutes its legal, valid and binding obligation, enforceable against each
such party in accordance with its terms and (b) there is no consent, approval or
other requirement known to the Company or such Guarantor which could reasonably
be expected to impair or materially delay the Company's or such Guarantor's
ability to perform its obligations under this Agreement or the Credit Agreement
as proposed to be amended hereby and (c) after giving effect to the provisions
of SECTION 2 hereof, no Default or Event of Default will be continuing.

                  SECTION 5. REAFFIRMATION, RATIFICATION AND ACKNOWLEDGMENT. (a)
The Company and each of the Guarantors hereby (i) ratifies and reaffirms all of
its payment and performance obligations, contingent or otherwise, and each grant
of security interests and liens in favor of the Agent, under each Loan Document
to which it is a party, (ii) agrees and acknowledges that such ratification and
reaffirmation is not a condition to the continued effectiveness of such Loan
Documents, and (iii) agrees that neither such ratification and reaffirmation,
nor the Agent's nor any Banks' solicitation of such ratification and
reaffirmation, constitutes a course of dealing giving rise to any obligation or
condition requiring a similar or any other ratification or reaffirmation from
the Company or the Guarantors with respect to any subsequent modifications
consent or waiver with respect to the Credit Agreement or other Loan Documents.
The Credit Agreement and each other Loan Document is in all respects hereby
ratified and confirmed and, except as is expressly set forth in SECTION 2
hereof, neither the execution, delivery nor effectiveness of this Agreement
shall operate as a waiver of any Default or Event of Default (whether or not
known to the Agent, the Collateral Agent or any Bank) or any right, power or
remedy of the Agent, the Collateral Agent or any Bank of any provision contained
in the Credit Agreement or any other Loan Document, whether as a result of any
Default or Event of Default or otherwise. This Agreement shall constitute a
"Loan Document" for purposes of the Credit Agreement.

                  (b) The Company and each of the Guarantors hereby acknowledges
and confirms that (i) it does not have any grounds, and hereby agrees not to
challenge (or to allege or to pursue any matter, cause or claim arising under or
with respect to), in any case based upon acts or omissions of the Agent or any
of the Banks occurring prior to the date hereof or facts otherwise known to it
as of the date hereof, the effectiveness, genuiness, validity, collectibility or
enforceability of the Credit Agreement or any of the other Loan Documents, the
Obligations, the Liens securing such Obligations, or any of the terms or
conditions of any Loan Document (it being understood that such acknowledgement
and confirmation does not preclude the Company or the Guarantors from
challenging the Agent's or any Bank's interpretation of any term or provision of
the Credit Agreement or other Loan Document) and (ii) it does not possess (and
hereby forever waives, remises, releases, discharges and holds harmless the
Banks, the Agent and their respective affiliates, stockholders, directors,
officers, employees, attorneys, agents and representatives and each of their
respective heirs, executors, administrators, successors and assigns
(collectively, the "INDEMNIFIED PARTIES") from and against, and agrees not to
allege or pursue) any action, cause of action, suit, debt, claim, counterclaim,
cross-claim, demand,

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defense, offset, opposition, demand and other right of action whatsoever,
whether in law, equity or otherwise (which it, all those claiming by, through or
under it, or its successors or assigns, have or may have) against the
Indemnified Parties, or any of them, by reason of, any matter, cause or thing
whatsoever, with respect to events or omissions occurring or arising on or prior
to the date hereof and relating to the Credit Agreement or any of the other Loan
Documents (including, without limitation, with respect to the payment,
performance, validity or enforceability of the Obligations, the Liens securing
the Obligations or any or all of the terms or conditions of any Loan Document)
or any transaction relating thereto; PROVIDED, HOWEVER, THAT neither the Company
nor any Guarantor hereby releases or holds harmless any Indemnified Party for
actions or omissions by any such Indemnified Party constituting, or losses or
expenses directly resulting from, the gross negligence or willful misconduct of
such Indemnified Party.

                  SECTION 6.  MISCELLANEOUS.

                  (a) EXECUTION IN COUNTERPARTS; GOVERNING LAW This Agreement
may be executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed and delivered shall be
deemed to be an original and all of which when taken together shall constitute
but one and the same instrument. This Agreement shall be governed by and
construed in accordance with the laws of the State of Illinois.

                  (b) SECTION TITLES. The section titles contained in this
Agreement are and shall be without substance, meaning or content of any kind
whatsoever and are not a part of the agreement between the parties hereto.

                  (c) AGENT'S EXPENSE. The Company hereby agrees to promptly
reimburse the Agent for all reasonable out-of-pocket expenses, including,
without limitation, attorneys' and paralegals fees, field exam fees and expenses
and consultants fees and expenses, it has heretofore or hereafter incurred or
incurs in connection with the preparation, negotiation, administration and
execution of the Loan Agreement, this Agreement or any document, instrument,
agreement delivered pursuant to the Loan Agreement or this Agreement.

                                     * * * *

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                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be executed by their respective officers thereunto duly authorized
as of the date first above written.

WATERLINK, INC.
WATERLINK MANAGEMENT, INC.
WATERLINK SEPARATIONS, INC.
WATERLINK BIOLOGICAL WASTEWATER SYSTEMS, INC.
WATERLINK TECHNOLOGIES, INC.
BARNEBEY & SUTCLIFFE CORPORATION (a/k/a Barnebey Sutcliffe Corporation)
C'TREAT OFFSHORE, INC. (f/k/a Chemitreat Services, Inc.)
WATERLINK N.S., INC.

By: /s/ Donald A. Weidig
    --------------------
Name:
Title: Chief Financial Officer

<PAGE>

                             BANK OF AMERICA, N.A., as Agent and Collateral
                             Agent

                             By: /s/ Kristine D. Hyde
                                 ------------------------------------------

                             Title: Vice President
                                    ---------------------------------------

                             BANK OF AMERICA, N.A., Individually as a Bank and
                             as Issuing Bank

                             By: /s/ Thomas E. Czerwinski
                                 ------------------------------------------

                             Title:  Vice President
                                    ---------------------------------------

                             COMERICA BANK

                             By: /s/ Preeti Sarnaik
                                 ------------------------------------------

                             Title: Assistant Vice President
                                    ---------------------------------------

                             FIFTH THIRD BANK, CENTRAL OHIO

                             By:  /s/ David Peura
                                 ------------------------------------------

                             Title: Assistant Vice President
                                    ---------------------------------------

                             HARRIS TRUST AND SAVINGS BANK

                             By: /s/ Michael J. Johnson
                                 ------------------------------------------

                             Title: Managing Director
                                    ---------------------------------------

                             PNC BANK, NATIONAL ASSOCIATION

                             By: /s/ James B. Horan
                                 ------------------------------------------

                             Title: Vice President
                                    ---------------------------------------

                             UNION BANK OF CALIFORNIA, N.A.

                             By: /s/ Christiana Creekpaum
                                 ------------------------------------------

                             Title: Vice President
                                    ---------------------------------------<PAGE>

                                                                   EXHIBIT 10.35

                              FOURTEENTH AMENDMENT

                                       TO

                      AMENDED AND RESTATED CREDIT AGREEMENT

                  THIS FOURTEENTH AMENDMENT TO AMENDED AND RESTATED CREDIT
AGREEMENT (the "AGREEMENT") is being executed and delivered as of January 15,
2002, by and among Waterlink, Inc., a Delaware corporation (the "COMPANY"), the
"Banks" party to and as defined in the "Credit Agreement" referred to below (the
"BANKS") and Bank of America, N.A. in its capacities as "Agent" for the Banks
under the Credit Agreement and "Collateral Agent" for the Banks pursuant to the
Collateral Documents (the "AGENT"). Capitalized terms used herein and not
defined herein shall have the meanings ascribed to such terms as set forth in
the Credit Agreement referred to and defined below.

                              W I T N E S S E T H:

                  WHEREAS, the Company, the Banks and the Agent are parties to
that certain Amended and Restated Credit Agreement dated as of June 27, 1997, as
heretofore further amended (the "CREDIT AGREEMENT"), pursuant to which the Banks
have agreed, subject to the terms and conditions set forth therein, to extend
credit to the Company;

                  WHEREAS, the Company has requested that the Banks extend the
Term Maturity Date and the Revolving Termination Date and, subject to the terms
and conditions of this Agreement, the Banks have agreed to such requests.

                  NOW, THEREFORE, in consideration of the foregoing premises,
the terms and conditions stated herein and other valuable consideration, the
receipt and sufficiency of which is hereby acknowledged by the Company, the
Banks and the Agent, such parties hereby agree as follows:

                  SECTION 1. AMENDMENT TO CREDIT AGREEMENT. Subject to the
satisfaction of each of the conditions set forth in SECTION 2 of this Agreement,
the Credit Agreement is hereby amended as follows (unless otherwise specified,
section, article, exhibit and schedule references refer to sections, articles,
exhibits and schedules of the Credit Agreement):

                  (a) SECTION 1.01 is amended to delete in its entirety CLAUSE
(iii) of the second PROVISO of the definition of "APPLICABLE MARGIN" and to
replace such clause with the following provisions:

         (iii) effective from October 1, 2001 to January 14, 2002, the
         Applicable Margin shall be, notwithstanding the Level in effect at any
         time, 3.50% with respect to Base Rate Loans and (iv) effective from and
         after January 15, 2002, the Applicable Margin shall be, notwithstanding
         the Level in effect at any time, 4.00% with respect to Base Rate Loans.

<PAGE>

                  (b) SECTION 1.01 is amended to delete the definition of
"EXCESS CASH FLOW" in its entirety and to replace such definition with the
following definition:

                           "EXCESS CASH FLOW" means, with respect to any fiscal
         period of the Company: (a) the Company's Adjusted Net Earnings from
         Operations for such period; MINUS (b) the sum of (i) all regularly
         scheduled installments of Indebtedness (including all Scheduled
         Repayments) which were actually paid in cash by the Company during such
         fiscal period, (ii) bank charges and deferred financing fees and bank
         agency fees paid in cash during such period, and (iii) Capital
         Expenditures which were actually paid in cash by the Company and its
         Subsidiaries during such fiscal period to the extent permitted
         hereunder, other than any such payments already deducted in the
         computation of the Company's Adjusted Net Earnings from Operations;
         PLUS (c) the sum of (i) any depreciation and amortization expense
         deducted in determining Net Income for such fiscal period, (ii) other
         non-cash charges deducted in computing such Net Income, (iii) any
         decrease in the Company's current assets other than cash during such
         period (other than any decrease in current liabilities as a direct
         result of the Company's application of a portion of proceeds from any
         Disposition to the satisfaction of current liabilities concurrently
         with the consummation of such Disposition), (iv) any increase in the
         Company's current liabilities during such period, (v) any net decrease
         in cash collateral pledged by the Company and its Subsidiaries to
         secure its reimbursement obligations with respect to surety bonds
         issued on behalf of the Company and its Subsidiaries in the ordinary
         course of business and (vi) any aggregate reduction during such period
         in the face amount of outstanding Letters of Credit securing the
         Company's and its Subsidiaries reimbursement obligations with respect
         to surety bonds issued on behalf of the Company and its Subsidiaries in
         the ordinary course of business; MINUS (d) the sum of (i) any increase
         in such Company's current assets other than cash during such period;
         and (ii) any decrease in such Company's current liabilities during such
         period, (iii) any net increase in cash collateral pledged by the
         Company and its Subsidiaries to secure its reimbursement obligations
         with respect to surety bonds issued on behalf of the Company and its
         Subsidiaries in the ordinary course of business and (iv) any net
         reduction in the outstanding principal balance of the Revolving Loan
         during such period as a result of voluntary repayments of such Loans
         made to create availability for the issuance of Letters of Credit
         issued during such period to secure the Company's and its Subsidiaries
         reimbursement obligations with respect to surety bonds issued on behalf
         of the Company and its Subsidiaries in the ordinary course of business.

                  (c) SECTION 1.01 is amended to delete the definition of
"INTEREST COVERAGE RATIO" in its entirety.

                  (d) SECTION 1.01 is further amended to delete the date
"January 15, 2002" set forth in each of the definitions of "LIQUIDITY DATE,"
"REVOLVING TERMINATION DATE," "SWING LINE TERMINATION DATE" and "TERM MATURITY
DATE" and to replace each such date with reference to the term "FINAL MATURITY
DATE."

                  (e) SECTION 1.01 is further amended to add the following new
definitions in their respective alphabetical locations:

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                  "ADJUSTED NET EARNINGS FROM OPERATIONS" means, with respect to
         any fiscal period of the Company, Net Income, LESS any and all of the
         following included in such net income: (a) gain or loss arising from
         the sale of any capital asset; (b) gain arising from any write-up in
         the book value of any asset; (c) earnings of any business entity,
         substantially all the assets of which have been acquired in any manner,
         or which has merged or otherwise consolidated with and into the Company
         or any Subsidiary to the extent realized by such other business entity
         prior to the date of such acquisition, merger or consolidation; (d)
         earnings of any business entity (other than a Subsidiary) in which the
         Company or any Subsidiary has an ownership interest unless (and only to
         the extent) such earnings shall actually have been received by the
         Company or such Subsidiary in the form of cash distributions; (e)
         earnings of any Person to which assets of the Company or any Subsidiary
         shall have been sold, transferred or disposed of, or into which the
         Company or any Subsidiary shall have been merged, or which has been a
         party with the Company or any Subsidiary to any consolidation or other
         form of reorganization in which the Company or such Subsidiary is not
         the surviving entity, after the date of such transaction; (f) gain
         arising from the acquisition of debt or equity securities of the
         Company or any Subsidiary or from cancellation or forgiveness of
         Indebtedness; and (g) gain arising from extraordinary items including
         restructuring charges, as determined in accordance with GAAP, or from
         any other non-recurring transaction.

                  "FINAL MATURITY DATE" means October 1, 2002, provided,
         however, that, if, as of May 31, 2002, the Company shall have failed
         to satisfy any of the Pure Water Sale Conditions, such term shall
         mean May 31, 2002.

                  "FOURTEENTH AMENDMENT" means the Fourteenth Amendment to this
         Agreement dated as of January 15, 2002.

                  "FOURTEENTH AMENDMENT EFFECTIVENESS DATE" means the date upon
         which the Agent advised the Company that the Fourteenth Amendment has
         become effective.

                  "PAYABLES TO INVENTORY AND EXCESS COSTS RATIO" means, as of
         any date of determination, the ratio of (a) the Company's accounts
         payable, to (b) the sum of the Company's total inventory PLUS costs in
         excess of billings, in each case determined in accordance with GAAP on
         a consolidated basis.

                  "PURE WATER SALE CONDITIONS" means, as of any date of
         determination, (a) the Company shall have entered into a definitive
         sale agreement with respect to all or substantially all of the assets
         or equity interests (or both) of its Pure Water Division, (b) such
         agreement and transaction shall have been approved in writing by the
         Required Lenders, (c) the prospective purchaser with respect to such
         agreement shall have delivered in escrow cash earnest money in an
         amount and pursuant to such terms as are approved in writing by the
         Required Lenders, (d) neither such prospective purchaser's nor the
         Company's obligation to consummate such transaction is subject to any
         unsatisfied conditions precedent (which has not been waived) with
         respect to such purchaser's financing for such transaction, such
         purchaser's due diligence with respect to the Pure Water Division, any
         governmental approval or governmentally imposed waiting period with
         respect to such purchaser or the Company, any board of directors',
         shareholders' (or similar bodies') or third party's approval or
         consent (other than the Lenders' approval), or any pending or
         threatened litigation with respect to such transaction.

                  (f) SECTION 1.01 is further amended to delete in its entirety
CLAUSE (III) of the definition of "EBITDA" and to replace such clause with the
following provision:

         (iii) charges incurred prior to December 1, 2001, not to exceed
         $2,400,000 in the aggregate for downsizing of the Company's corporate
         staff (including severance obligations) and closing its Cleveland, Ohio
         corporate offices,

                  (g) SECTION 1.01 is further amended to delete in its entirety
the definition of "STRATEGIC MILESTONES" and to replace such definition with the
following definition:

                  "STRATEGIC MILESTONES" means each of the following, in each
         case in a manner substantially consistent with general investment
         banking practices employed with respect to such processes as conducted
         in the United States: (a) the Company's distribution, on or before
         January 31, 2002, of comprehensive offering memoranda to prospective
         purchasers or investors providing disclosure necessary for the Company
         to offer to sell or otherwise dispose of substantially all of its Pure
         Water Division and (b) the Company's

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         setting forth a due date, which shall be not later than April 15, 2002,
         for such prospective purchasers or investors to submit to the Company
         written expressions of interest in purchasing or otherwise acquiring
         substantially all of its Pure Water Division.

                  (h) SECTION 2.04 is amended to delete both references in such
section to the term "Swing Line Termination Date" and to replace such references
with references to the term "Fourteenth Amendment Effective Date."

                  (i) SECTION 2.09(E) is deleted in its entirety and replaced
with the following provision:

                           (e) EXCESS CASH FLOW. On the forty-fifth (45th) day
         following the end of each fiscal quarter of the Company, commencing
         with the fiscal quarter ending March 31, 2002, the Company shall prepay
         the Scheduled Repayments in the inverse order of their respective
         maturities in amounts equal to 80% of Excess Cash Flow for such fiscal
         quarter; PROVIDED, HOWEVER, that if at the time of any such required
         prepayment the Company and its Subsidiaries shall have not yet
         completed its anticipated repair of the reactivation kiln located at
         Barnebey & Suttcliffe Corporation, and the aggregate amount actually
         expended for such repairs through such date is less than $500,000,
         then:

                           (i) subject to the Company's compliance with CLAUSE
                  (ii) below, the amount otherwise required to be prepaid under
                  this section and applied as a prepayment of the Scheduled
                  Repayments with respect to such fiscal quarter period ended
                  shall be reduced by an amount equal to the lesser of (x) the
                  amount otherwise required to be so prepaid and applied
                  hereunder for such period and (y) an amount (not less than
                  zero) equal to $500,000 MINUS the aggregate amount of such
                  expenditures actually made by the Company prior to such date
                  MINUS the aggregate amount of Kiln Reserves maintained by the
                  Agent at such time under and as defined in CLAUSE (ii) below
                  (prior to any increase in such reserve on such date with
                  respect to payments made with respect to the fiscal quarter
                  then ended); and

                           (ii) an amount equal to the lesser of (x) the sum of
                  the reduction determined pursuant to CLAUSE (i) above for such
                  fiscal quarter ended plus 20% of Excess Cash Flow for such
                  fiscal quarter ended and (y) the amount determined pursuant to
                  CLAUSE (i)(y) above, shall be paid by the Company to the Agent
                  and applied as a repayment of the outstanding principal
                  balance of the Revolving Loan and maintained by the Agent as a
                  reserve against availability under the Revolving Loan
                  Commitment (together with any such amount previously so paid
                  to the Agent under this clause and then maintained,
                  collectively, the "KILN RESERVE"), which Kiln Reserve may be
                  subsequently reduced upon the Company thereafter requesting
                  Revolving Loans (which are made pursuant to the terms and
                  conditions of this Agreement) the proceeds of which are
                  designated by the Company to the Agent as to be applied to the
                  payment of repair expenditures relating to the reactivation
                  kiln described above and supported by invoices for such
                  purposes as presented by the Company and satisfactory to the
                  Agent.

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<PAGE>

                  (j) SECTION 2.10(a)(i) is deleted in its entirety and replaced
with the following provision:

         On each date set forth below, the Company shall be required to repay
         the principal amount (or such other amount after giving effect to any
         prepayments permitted or required pursuant to this Agreement) of the
         Term Loans as is set forth opposite such date (each, a "Scheduled
         Repayment"):

                                   Date                          Amount
                                   ----                          ------

                           January 31, 2002                     $125,000
                           February 28, 2002                    $125,000
                           March 31, 2002                       $125,000
                           April 30, 2002                       $125,000
                           May 31, 2002                         $125,000
                           June 30, 2002                        $125,000
                           July 31, 2002                        $175,000
                           August 31, 2002                      $175,000
                           September, 30, 2002                  $175,000
                           Term Maturity Date                $11,676,627.03

                  (k) SECTION 2.12 is amended to add the following provision to
the end of such section:

                           (e) FOURTEENTH AMENDMENT FEES.

                           (i) On the earliest to occur of the first Liquidity
         Date following the Fourteenth Amendment Effectiveness Date, the
         acceleration of the Company's obligations pursuant to SECTION 9.02, and
         the Revolving Termination Date, the Company shall pay to the Agent in
         cash or other immediately available funds, for distribution to each
         Bank based on its Pro Rata Share, an amendment fee in an aggregate
         amount equal to 0.50% of the sum of the aggregate Revolving Loan
         Commitments plus the aggregate outstanding principal balance of the
         Term Loans calculated as of the Fourteenth Amendment Effective Date
         (after giving effect to any payments of such principal made on such
         date).

                           (ii) The Company shall pay to the Agent on June 30,
         2002, in cash or other immediately available funds, for distribution to
         each Bank based on its Pro Rata Share, a term loan fee in an aggregate
         amount equal to 0.50% of the outstanding aggregate outstanding
         principal balance of the Term Loans calculated as of June 30, 2002
         (after giving effect to any payments of such principal made on such
         date).

                  (l) SECTION 5.02 is amended to delete the word "and" which
appears at the end of CLAUSE (b) thereof and to add the following provision to
such section immediately following existing CLAUSE (C) thereof:

                           (d) COLLATERAL VALUE TO DEBT RATIO COMPLIANCE. The
         Agent shall have received a certificate (in form and detail acceptable
         to the Agent) demonstrating that,

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<PAGE>

         after giving effect to the requested Borrowing or issuance of or
         amendment to a Letter of Credit, the Collateral Value to Debt Ratio
         would be greater than or equal to 0.55 to 1.00, calculated based upon
         the Company's net accounts receivable as of the then immediately
         preceding Business Day and the Company's inventory and costs in excess
         of billings as of the last day of the then most recently ended calendar
         month.

                  (m) SECTION 7.14(e) is amended to delete the date "January 15,
2002" set forth therein, to replace such date with the date "February 15, 2002,"
and to add the following provision to the end of such section:

         ; PROVIDED, HOWEVER, that, unless and until such accounts become
         subject to such blocked account and lockbox agreements (whether with
         existing banks or replacement banks), at no time shall the Company
         permit the accounts balances thereof to exceed (i) $100,000 with
         respect to the Waterlink Technologies, Inc. account currently
         maintained in Boca Raton, Florida or (ii) $60,000 with respect to the
         C'Treat Offshore, Inc. account currently maintained in Dallas, Texas.

                  (n) SECTION 7.14 is further amended to add the following
provision to the end of such Section:

                           (f) On or before February 28, 2002, the Company will
         execute and deliver, and cause to be delivered, to the Agent, a
         mortgage or deed of trust in favor of the Agent as additional security
         for the Obligations with respect to all fee simple interests in real
         property of the Company and its Subsidiaries, together with title
         insurance policies (in an amount not to exceed the estimated fair
         market value of the property and expected appreciation thereof, if any,
         in each case as may be reasonably determined by the Agent) and
         endorsements, surveys, corporate authorization and incumbency
         certificates and legal opinions, in each case in form and substance
         reasonably satisfactory to the Agent.

                  (o) SECTION 8.01 is amended to delete in its entirety CLAUSES
(I) and (J) thereof and to replace each of such clauses with the following
provision:

                          [intentionally omitted];

                  (p) SECTION 8.05 is amended to delete CLAUSE (d) thereof in
its entirety and to replace such clause with the following provision:

                           (d) other Indebtedness in an aggregate amount
         outstanding not to exceed $500,000;

                  (q) SECTION 8.05 is further amended to delete the amount
"$6,500,000" set forth in CLAUSE (f) thereof and to replace such amount with the
amount "$500,000".

                  (r) SECTION 8.05 is further amended to delete the amount
"$10,000,000" set forth in CLAUSE (g) thereof and to replace such amount with
the amount "$3,000,000".

                  (s) SECTION 8.15 is amended to delete the ratio "0.50 to 1.00"
set forth therein and to replace such ratio with the ratio "0.55 to 1.00."

                                       6
<PAGE>

                  (t) SECTIONS 8.16 through 8.18 are deleted in their entirety
and replaced with the following:

                           8.16. MINIMUM THREE-MONTH EBITDA. (a) The Company
         shall not permit its EBITDA for any three consecutive calendar month
         period ending as of any of the dates set forth below to be less than
         the applicable corresponding amount set forth below opposite such
         dates:

                                    Date                    Minimum Amount
                                    ----                    --------------

                           December 31, 2001                  $1,050,000

                           January 31, 2002                   $1,085,000

                           February 28, 2002                  $1,150,000

                           March 31, 2002                     $1,550,000

                           April 30, 2002                     $1,600,000

                           May 31, 2002                       $1,700,000

                           June 30, 2002                      $1,900,000

                           July 31, 2002                      $2,225,000

                           August 31, 2002                    $2,400,000;

         PROVIDED, HOWEVER, that, upon the sale or other disposition by the
         Company of all or substantially all of any of the Remaining Business
         Units, such minimum amounts shall be adjusted in a manner reasonably
         determined by the Agent so as to establish a minimum EBITDA amount for
         subsequent periods which approximates 85% of the Company's projected
         EBITDA for such periods, as projected on the Fourteenth Amendment
         Effectiveness Date, after giving effect to the elimination therefrom of
         the projected EBITDA of the operations subject to all such
         dispositions, as projected as of the Fourteenth Amendment Effectiveness
         Date.

                           (b) The Company shall not permit the consolidating
         earnings before interest, taxes and depreciation (calculated in the
         same manner as EBITDA, but on a consolidating basis) for either of its
         Specialty Products or Pure Water Divisions, for so long as its
         operations remain as a division or Subsidiary of the Company, for any
         three consecutive calendar month period ending as of any of the dates
         set forth below to be less than the applicable corresponding amount set
         forth below opposite such dates:

                           Date          Specialty Products          Pure Water
                           ----          ------------------          ----------

                  December 31, 2001         $1,120,000                $175,000

                  January 31, 2002          $1,050,000                $190,000

                                       7
<PAGE>

                  February 28, 2002         $1,150,000                $150,000

                  March 31, 2002            $1,400,000                $300,000

                  April 30, 2002            $1,400,000                $350,000

                  May 31, 2002              $1,350,000                $500,000

                  June 30, 2002             $1,400,000                $675,000

                  July 31, 2002             $1,625,000                $775,000

                  August 31, 2002           $1,800,000                $775,000.

                           8.17 PAYABLES TO INVENTORY AND EXCESS COSTS. The
         Company shall not permit its Payables to Inventory and Excess Costs
         Ratio, as of the last day of any calendar month ending on or after
         December 31, 2001, to be less than 0.35 to 1.00.

                           8.18 WEEKLY NET BOOK RECEIVABLES. The Company shall
         not permit the sum of (a) the combined net book value of the accounts
         receivable with respect to its Pure Water and Specialty Products
         Divisions, as of the last Business Day of any week ended after the
         Fourteenth Amendment Effective Date PLUS (b) the aggregate amount of
         cash collateral pledged by the Company to the Agent pursuant to this
         section (and subject to agreements acceptable to the Agent), to be less
         than $10,000,000; PROVIDED, HOWEVER, that, upon the sale or other
         disposition by the Company of either of such divisions, such minimum
         amount shall be adjusted in a manner reasonably determined by the Agent
         so as to establish a minimum amount for subsequent periods which
         approximates 85% of the Company's projected net book receivables for
         such periods, as projected on the Fourteenth Amendment Effectiveness
         Date, after giving effect to the elimination therefrom of the projected
         net book receivables of the operations subject to all such disposition,
         as projected as of the Fourteenth Amendment Effectiveness Date.

                  (u) SECTION 8.20 is amended to delete CLAUSE (iii) thereof in
its entirety and to replace such clause with the following provisions:

         (iii) in each of its 2000 and 2001 fiscal years, in an aggregate amount
         not in excess of $6,000,000 and (iv) in its 2002 fiscal year, in an
         aggregate amount not in excess of $1,250,000.

                  (v) EXHIBIT C is deleted in its entirety and replaced with the
exhibit attached hereto as ANNEX 1 to this Agreement.

                  SECTION 2. EFFECTIVENESS OF THE AMENDMENT AND WAIVER;
CONDITIONS PRECEDENT. The provisions of SECTION 1 of this Agreement shall become
effective as of the date hereof upon the Agent's receipt of each of the
following:

                                       8
<PAGE>

                  (a) originally-executed (or facsimiles of originally-
         executed) counterparts of this Agreement executed and delivered by duly
         authorized officers of the Company, each Guarantor and each of the
         Banks; and

                  (b) evidence satisfactory to the Agent that those certain
         Convertible Subordinated Notes dated March 2, 1998 issued by the
         Company to the former shareholders of Chemitreat Services, Inc. in an
         original aggregate principal amount of $2,250,000 as heretofore
         amended, and those certain 13.00% Subordinated Notes dated January 18,
         2001 issued by the Company to Brantley Venture Partners III, L.P. and
         CID Equity Capital V, L.P. in an original aggregate principal amount of
         $1,000,000, in each case has been modified in a manner acceptable to
         the Agent to extend the maturity date and all remaining principal
         payments due thereunder to a date not earlier that October 15, 2002.

                  SECTION 3. REPRESENTATIONS AND WARRANTIES. The Company and
each Guarantor hereby represents and warrants that (a) this Agreement
constitutes its legal, valid and binding obligation, enforceable against each
such party in accordance with its terms and (b) there is no consent, approval or
other requirement known to the Company or such Guarantor which could reasonably
be expected to impair or materially delay the Company's or such Guarantor's
ability to perform its obligations under this Agreement or the Credit Agreement
as proposed to be amended hereby and (c) no Default or Event of Default has
occurred and is continuing.

                  SECTION 4. REAFFIRMATION, RATIFICATION AND ACKNOWLEDGMENT. (a)
The Company and each of the Guarantors hereby (i) ratifies and reaffirms all of
its payment and performance obligations, contingent or otherwise, and each grant
of security interests and liens in favor of the Agent, under each Loan Document
to which it is a party, (ii) agrees and acknowledges that such ratification and
reaffirmation is not a condition to the continued effectiveness of such Loan
Documents, and (iii) agrees that neither such ratification and reaffirmation,
nor the Agent's nor any Banks' solicitation of such ratification and
reaffirmation, constitutes a course of dealing giving rise to any obligation or
condition requiring a similar or any other ratification or reaffirmation from
the Company or the Guarantors with respect to any subsequent modifications
consent or waiver with respect to the Credit Agreement or other Loan Documents.
The Credit Agreement and each other Loan Document is in all respects hereby
ratified and confirmed and neither the execution, delivery nor effectiveness of
this Agreement shall operate as a waiver of any Default or Event of Default
(whether or not known to the Agent, the Collateral Agent or any Bank) or any
right, power or remedy of the Agent, the Collateral Agent or any Bank of any
provision contained in the Credit Agreement or any other Loan Document, whether
as a result of any Default or Event of Default or otherwise. This Agreement
shall constitute a "Loan Document" for purposes of the Credit Agreement.

                  (b) The Company and each of the Guarantors hereby acknowledges
and confirms that (i) it does not have any grounds, and hereby agrees not to
challenge (or to allege or to pursue any matter, cause or claim arising under or
with respect to), in any case based upon acts or

                                       9
<PAGE>

omissions of the Agent or any of the Banks occurring prior to the date hereof or
facts otherwise known to it as of the date hereof, the effectiveness, genuiness,
validity, collectibility or enforceability of the Credit Agreement or any of the
other Loan Documents, the Obligations, the Liens securing such Obligations, or
any of the terms or conditions of any Loan Document (it being understood that
such acknowledgement and confirmation does not preclude the Company or the
Guarantors from challenging the Agent's or any Bank's interpretation of any term
or provision of the Credit Agreement or other Loan Document) and (ii) it does
not possess (and hereby forever waives, remises, releases, discharges and holds
harmless the Banks, the Agent and their respective affiliates, stockholders,
directors, officers, employees, attorneys, agents and representatives and each
of their respective heirs, executors, administrators, successors and assigns
(collectively, the "INDEMNIFIED PARTIES") from and against, and agrees not to
allege or pursue) any action, cause of action, suit, debt, claim, counterclaim,
cross-claim, demand, defense, offset, opposition, demand and other right of
action whatsoever, whether in law, equity or otherwise (which it, all those
claiming by, through or under it, or its successors or assigns, have or may
have) against the Indemnified Parties, or any of them, by reason of, any matter,
cause or thing whatsoever, with respect to events or omissions occurring or
arising on or prior to the date hereof and relating to the Credit Agreement or
any of the other Loan Documents (including, without limitation, with respect to
the payment, performance, validity or enforceability of the Obligations, the
Liens securing the Obligations or any or all of the terms or conditions of any
Loan Document) or any transaction relating thereto; PROVIDED, HOWEVER, THAT
neither the Company nor any Guarantor hereby releases or holds harmless any
Indemnified Party for actions or omissions by any such Indemnified Party
constituting, or losses or expenses directly resulting from, the gross
negligence or willful misconduct of such Indemnified Party.

                  SECTION 5.  MISCELLANEOUS.

                  (a) EXECUTION IN COUNTERPARTS; GOVERNING LAW This Agreement
may be executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed and delivered shall be
deemed to be an original and all of which when taken together shall constitute
but one and the same instrument. This Agreement shall be governed by and
construed in accordance with the laws of the State of Illinois.

                  (b) SECTION TITLES. The section titles contained in this
Agreement are and shall be without substance, meaning or content of any kind
whatsoever and are not a part of the agreement between the parties hereto.

                  (c) AGENT'S EXPENSE. The Company hereby agrees to promptly
reimburse the Agent for all reasonable out-of-pocket expenses, including,
without limitation, attorneys' and paralegals fees, field exam fees and expenses
and consultants fees and expenses, it has heretofore or hereafter incurred or
incurs in connection with the preparation, negotiation, administration and
execution of the Loan Agreement, this Agreement or any document, instrument,
agreement delivered pursuant to the Loan Agreement or this Agreement.

                                     * * * *

                                       10
<PAGE>

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be executed by their respective officers thereunto duly authorized
as of the date first above written.

WATERLINK, INC.
WATERLINK MANAGEMENT, INC.
WATERLINK SEPARATIONS, INC.
WATERLINK BIOLOGICAL WASTEWATER SYSTEMS, INC.
WATERLINK TECHNOLOGIES, INC.
BARNEBEY & SUTCLIFFE CORPORATION (a/k/a Barnebey Sutcliffe Corporation)
C'TREAT OFFSHORE, INC. (f/k/a Chemitreat Services, Inc.)
WATERLINK N.S., INC.

By: ___________________________
Name:
Title:

<PAGE>

                                    BANK OF AMERICA, N.A., as Agent and
                                    Collateral Agent

                                    By:________________________________________

                                    Title:_____________________________________

                                    BANK OF AMERICA, N.A., Individually as a
                                    Bank and as Issuing Bank

                                    By:_________________________________________

                                    Title:______________________________________

                                    COMERICA BANK

                                    By:_________________________________________

                                    Title:______________________________________

                                    FIFTH THIRD BANK, CENTRAL OHIO

                                    By:_________________________________________

                                    Title:______________________________________

                                    HARRIS TRUST AND SAVINGS BANK

                                    By:_________________________________________

                                    Title:______________________________________

                                    PNC BANK, NATIONAL ASSOCIATION

                                    By:_________________________________________

                                    Title:______________________________________

<PAGE>

                                    UNION BANK OF CALIFORNIA, N.A.

                                    By:_________________________________________

                                    Title:______________________________________

<PAGE>

                                               (Annex 1 to Fourteenth Amendment)

                                    EXHIBIT C

                         FORM OF COMPLIANCE CERTIFICATE
                         ------------------------------

Bank of America, N.A., as Agent
for the Banks party to the Credit
Agreement referred to below
231 South LaSalle Street
Chicago, Illinois  60697

Attention:  ________________

Ladies and Gentlemen:

                  This certificate is furnished to you by Waterlink, Inc. (the
"COMPANY"), pursuant to Section 7.02(b) of that certain Amended and Restated
Credit Agreement, dated as of June 27, 1997, among the Company, the financial
institutions party thereto (the "BANKS"), and Bank of America, N. A., as agent
for such Banks (as the same has been heretofore and may be hereafter further
amended, restated, supplemented or otherwise modified from time to time, the
"CREDIT AGREEMENT"), concurrently with the delivery of the financial statements
required pursuant to Section 7.01 of the Credit Agreement. Terms not otherwise
defined herein are used herein as defined in the Credit Agreement.

                  The undersigned, on behalf of the Company, hereby certifies
that:

                  (A) no Default or Event of Default has occurred and is
continuing, except as described in Attachment 1 hereto;

                  (B) the financial data and computations set forth in Schedule
1 below, evidencing compliance with the covenants set forth in Sections 8.05(d),
(f) and (g), 8.15, 8.16, 8.17 and 8.20 of the Credit Agreement, are true and
correct as of _____________, ____(1) (the "COMPUTATION DATE"); and

                  (C) if the financial statements of the Company being
concurrently delivered were not prepared in accordance with GAAP, Attachment 2
hereto sets forth any derivations required to conform the relevant data in such
financial statements to the computations set forth below.

____________________

(1) The last day of the accounting period for which financial statements are
being concurrently delivered.

<PAGE>

                  The foregoing certifications, together with the computations
set forth in Schedule 1 hereto and the financial statements delivered with this
Compliance Certificate in support hereof, are made and delivered as of this
_____ day of _____________, ____.

                                       WATERLINK, INC.

                                       By: __________________________________
                                              Name: _________________________
                                              Its: __________________________(2)

______________________

(2) To be executed by a Responsible Officer of the Company.

<PAGE>

                                   SCHEDULE 1
                                   ----------

                                  COMPUTATIONS
                                  ------------

<TABLE>
<S>      <C>                                                  <C>                      <C>

I.       Section 8.05 Indebtedness
         -------------------------

A.       Clause (d)
         ----------

1. Aggregate principal amount of Indebtedness permitted:                                $500,000

2. Actual amount of Indebtedness as of the date of determination:                       $________

B.       Clause (f)
         ----------

1. Aggregate principal amount of Indebtedness permitted:                                $500,000

2. Actual amount of Indebtedness as of the date of determination:                       $________

C.       Clause (g)
         ----------

1. Aggregate principal amount of Indebtedness permitted:                                $3,000,000

2. Actual amount of Indebtedness as of the date of determination:                       $_________

II.      Section 8.15 Collateral Value to Debt Ratio
         -------------------------------------------

1.  Date of Determination: ____________, ____.

2.  Required:                                                                           0.55 to 1.00

3.  Actual:

         (a)      net accounts receivable                     $____________

         (b)      inventory                                   $____________

         (c)      costs in excess of billings                 $____________

         (d)      sum of (a) through (c)                      $____________

         (e)      outstanding Loans                           $____________

         (f)      L/C Obligations in excess of $465,072       $____________
</TABLE>

<PAGE>

<TABLE>
<S>      <C>                                                        <C>              <C>
         (g)      sum of (e) and (f)                                $____________

         (h)      ratio of (d) to (g)                                                ____ to 1.00.

III.     Section 8.16 Three-Month EBITDA
         -------------------------------

1.  Three months ending: ____________, ____.

2.  Consolidated EBITDA for such period:                                             $__________
                                                                    Required:        $__________

3.  Consolidating EBITDA for such period for Specialty Products:                     $__________
                                                                    Required:        $__________

4.  Consolidating EBITDA for such period for Pure Water:                             $__________
                                                                    Required:        $__________

IV.      Section 8.17 Payables to Inventory and Excess Costs
         ---------------------------------------------------

1.  Date of Determination: ____________, ____.

2.  Required:                                                                        0.35 to 1.00

3.  Actual:

         (a)      accounts payable                                  $____________

         (b)      inventory                                         $____________

         (c)      costs in excess of billings                       $____________

         (d)      sum of (b) and (c)                                $____________

         (e)      ratio of (a) to (d)                                                     ____ to

</TABLE>

<PAGE>

<TABLE>
<S>      <C>                                                  <C>               <C>
V.       Section 8.18 Weekly Net Book Receivables
         ----------------------------------------

1.  Date of Determination: _______________, ___.

2.  Required:                                                                      $10,000,000

3.  Actual:

         (a)      net book receivables of Pure Water          $____________

         (b)      net book receivables of Specialty Products  $_____________

         (c)      cash collateral                             $_____________

         (d)      sum of (a) through (c)                                        $_____________

VI.      Section 8.20 Capital Expenditures
         ---------------------------------

1.       Date of Determination: ___________. ____.

2.       Maximum Permitted in Fiscal Year:                                      $_____________

2.       Capital Expenditures Incurred Year to Date through
         Date of Determination                                                  $_____________.

</TABLE>

<PAGE>

                                  ATTACHMENT 1
                                  ------------

                DESCRIPTION OF ANY DEFAULTS OR EVENTS OF DEFAULT
                ------------------------------------------------

<PAGE>

                                  ATTACHMENT 2
                                  ------------

           DERIVATIONS REQUIRED TO CONFORM RELEVANT DATA IF FINANCIAL
              STATEMENTS WERE NOT PREPARED IN ACCORDANCE WITH GAAP
              ----------------------------------------------------

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