AMTROL ST-5 (390570), THERM-X-TROL INLINE THERMAL EXPANSION TANKS
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AMTROL ST-5, 390570 HIGH-GLOSS TAN, ST MODELS: THERM-X-TROL INLINE THERMAL EXPANSION TANK, 5-Year WarrantyAmtrol invented the thermal expansion tank to control pressure build-up in closed, hot water systems. This prevents the water heater pressure relief valve from opening, saves energy and eliminates a potential safety hazard. All Therm-X-Trol expansion tanks are made in the USA in our ISO 9001:2008 registered facilities
Accepts expanded water caused by thermal expansion.
Returns water to the system when hot water is used.
Prevents dripping faucets, intermittent toilet fill and pressure relief valve discharge.
Protects water heater, appliances and fixtures.
Eliminates wasted energy and water.
Prevents dangerous pressure buildup.
Accepts expanded water as system temperature rises and returns hot water to system when demand occurs.
Required by most building codes where backflow preventors are specified.
Stainless Steel System Connection. Maximum Operating Temperature: 200F. Maximum Working Pressure: 150 psig. Factory Pre-charge: 40 psig.