Amtrol THERM-X-TROL® Water Heater Expansion Tank ST-12 4.4 Gallons ST-12

This item is NOT returnable.

Thermal expansion occurs as domestic water is heated. Left unchecked the resulting pressure increase can cause relief valve discharge and other potentially hazardous conditions. Therm-x-trol® expansion tanks absorb this expanded water keeping water pressure at a safe level. Features ul style"margin-top0px;padding-top 5px; padding-bottom 5px;" antimicrobial liner neutralizes bacteria on contact patent pending turbulator water diffuser 50 psi precharge - the industry's highest deep drawn steel domes for 2x the strength of other tanks thickest diaphragm for extra long life hoop and groove design for added reliability stainless steel system connection nsf 61 approved meets ca and vt low lead standards made in the usa water heater manufacturers and plumbing codes require the installation of an expansion control device if a backflow preventor pressure reducing valve or check valve is installed in the domestic supply line. Therm-x-trol satisfies all manufacturers' requirements.

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