EXHIBIT 99.1 August 14, 2002 VIA EDGAR Securities and Exchange Commission Judiciary Plaza 450 Fifth Street, N.W. Washington, D.C. 20549 Re: AMTROL Inc./Quarterly Report on Form 10-Q for the Quarterly Period ended June 30, 2002 (Commission File No. 0-20328) Ladies and Gentlemen: Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned Chief Executive Officer and Chief Financial Officer of AMTROL Inc. (the "Company") each hereby certify that the periodic report referenced above and filed by the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934, as amended, and that the information contained in said report fairly presents, in all material respects, the financial condition and results of operations of the Company. Very truly yours, AMTROL Inc. /s/ Albert D. Indelicato - ---------------------------- Albert D. Indelicato Chief Executive Officer /s/ Larry T. Guillemette - ---------------------------- Larry T. Guillemette Chief Financial Officer