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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.
THERM-X-TROL® Thermal Expansion Absorbers
Thermal expansion occurs as domestic water is heated. Left unchecked, the resulting pressure increase can cause relief valve discharge and other potentially unsafe conditions.Therm-X-Trol® expansion tanks absorb this expanded water, keeping water pressure at a safe level. A) #1 choice of Professional Installers in USA
B) Most effective way to control Thermal Expansion C) Stainless steel system connection D) Molded, polypropylene liner for maximum corrosion resistance E) NSF 61 approved F) Broadest line of models to fit any application G) Meets CA and VT low lead laws