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                                                                    EXHIBIT 31.2

                                 CERTIFICATIONS

I, Larry T. Guillemette, certify that:

         1.       I have reviewed this quarterly report on Form 10-Q of AMTROL
                  Inc;

         2.       Based on my knowledge, this quarterly report does not contain
                  any untrue statement of a material fact or omit to state a
                  material fact necessary to make the statements made, in light
                  of the circumstances under which such statements were made,
                  not misleading with respect to the period covered by this
                  quarterly report;

         3.       Based on my knowledge, the financial statements, and other
                  financial information included in this quarterly report,
                  fairly present in all material respects the financial
                  condition, results of operations and cash flows of the
                  Registrant as of, and for, the periods presented in this
                  quarterly report;

         4.       The Registrant's other certifying officers and I are
                  responsible for establishing and maintaining disclosure
                  controls and procedures (as defined in Exchange Act Rules
                  13a-15(e) and 15d-15(e)) for the Registrant and have:

                     a.        Designed such disclosure controls and procedures,
                               or caused such disclosure controls and procedures
                               to be designed under our supervision, to ensure
                               that material information relating to the
                               Registrant, including its consolidated
                               subsidiaries, is made known to us by others
                               within those entities, particularly during the
                               period in which this quarterly report is being
                               prepared;

                     b.        (Paragraph omitted in accordance with SEC
                               transition instructions contained in SEC Release
                               34-47986)

                     c.        Evaluated the effectiveness of the Registrant's
                               disclosure controls and procedures and presented
                               in this report our conclusions about the
                               effectiveness of the disclosure controls and
                               procedures, as of the end of the period covered
                               by this quarterly report based on such
                               evaluation; and

                     d.        Disclosed in this quarterly report any change in
                               the Registrant's internal control over financial
                               reporting that occurred during the Registrant's
                               most recent fiscal quarter (the Registrant's
                               fourth fiscal quarter in the case of an annual
                               report) that has materially affected, or is
                               reasonably likely to materially affect, the
                               Registrant's internal control over financial
                               reporting; and

         5.       The Registrant's other certifying officers and I have
                  disclosed, based on our most recent evaluation of internal
                  control over financial reporting, to the Registrant's auditors
                  and the audit committee of the Registrant's Board of Directors
                  (or persons performing the equivalent functions):

                     a.        All significant deficiencies and material
                               weaknesses in the design or operation of
                               internals control over financial reporting which
                               are reasonably likely to adversely affect the
                               Registrant's ability to record, process,
                               summarize and report financial information; and

                     b.        Any fraud, whether or not material, that involves
                               management or other employees who have a
                               significant role in the Registrant's internal
                               control over financial reporting.

Date: November 14, 2003                       By: /s/LARRY T. GUILLEMETTE
                                                  ------------------------------
                                                     Larry T. Guillemette
                                                     Executive Vice President,
                                                     Chief Financial Officer and
                                                     Treasurer