The Therm-X-Trol ST-12 is an Iin-Line Expansion Tank designed to accept expanded water as system temperature rises and returns hot water to system when demand occurs. Most building codes and water heater warranties require some type of expansion tank system. With a factory precharge of 50 PSI, the Amtrol Therm-X-Trol is the industry's highest pressure range. The Therm-X-Trol comes with an InSight indicator cap, and antimicrobial liner and a turbulator.
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.
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.
Tank Volume (Gallons) | 4.4 |
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Max Accepting Volume (Gallons) | 3.2 |
Dimensions | Diameter 11"; Height 15"; System Connection 3/4" |
Maximum Operating Temperature | 200F |
Maximum Working Pressure | 150 PSIG (Factory Precharge 50 PSIG) |
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