ST-12 | Expansion Tank Therm-X-Trol Thermal 4.4 Gallon 150 Pounds per Square Inch Gauge 3/4" MNPT ST-12 Non-ASME for Residential Closed Potable Water Systems | Amtrol

Amtrol Thermal Expansion Tank: ST-12 The ST-12 Thermal Expansion Tank from Amtrol is a non-ASME-compliant expansion tank designed for residential closed potable water systems. This 4.4-gallon tank features a 3/4" MNPT inlet/outlet connection and a 150 PSI gauge. It has a precharge pressure of 50 PSIG and a maximum temperature rating of 200 degrees Fahrenheit. Key Features and Benefits: Tank Capacity: 4.4 gallons Pressure Rating: 150 PSI Inlet/Outlet Connection: 3/4" MNPT Precharge Pressure: 50 PSIG Temperature Rating: 200 degrees Fahrenheit Antimicrobial liner inhibits bacterial growth Patented Turbulator water circulation device enhances efficiency InSight indicator cap for easy tank maintenance monitoring Deep drawn steel and multi-dome construction for durability Heavy-duty butyl diaphragm ensures long-lasting performance Shop Our trusted HVAC store for the best prices and fast shipping on the Amtrol ST-12 Thermal Expansion Tank! Expansion Tank Therm-X-Trol Thermal 4.4 Gallon 15