Thermal Expansion Tank

Amtrol Therm-X-Trol Model ST-5 2-Gallon Thermal Expansion Tank Designed For Closed Domestic Hot Water Systems. Features A 3/4" Threaded Connection, 50 PSI Factory Precharge, 150 PSI Maximum Working Pressure, Antimicrobial Liner, Turbulator Water Circulation Technology, And InSight Service Indicator. Helps Control Thermal Expansion And Excessive Pressure Buildup In Residential Water Heater Systems. New, Never Installed, In Original Factory Box. *NEW* *PICKUP ONLY*