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    Heating-Air Conditioning-Refrigeration-Burner Boiler Controls
Parts for all your HVAC needs
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 53-13 Van Dam Street, Long Island City, NY 11101

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

Boiler System Expansion Tanks

Amtrol designed and patented the first Extrol diaphragm expansion tank in 1954 to control system pressure and help reduce energy consumption in heating and chilled water systems. Over six decades later, Extrol is still the world’s leading expansion tank brand, setting the standard for quality, reliability and innovation.

All Extrol tanks are made in the USA at our ISO registered facilities by American workers dedicated to producing the highest quality expansion tanks in the world.