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  • PRODUCT LITERATURE (5)
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  • THERM-X-TROL®
    Water Heater Expansion Tanks


    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. Therm-X-Trol tanks feature:

    • Antimicrobial liner that neutralizes 99% of 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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