Amtrol ST-12 Thermal Expansion Tank

Thermal Expansion Tank; Type In-Line; Inlet/Outlet Connection 3/4 Inch Female Threaded x 3/4 Inch Female Threaded; Tank Material Urethane Top Coated Steel; Tank Inner Lining Antimicrobial; Temperature Rating 200 Deg F; Pressure Rating 150 PSIG; Tank Dimensions 11 Inch Diameter x 15 Inch Height; Tank Capacity 4.4 Gallon; Tank Warranty 5 Year; Diaphragm Type Heavy Duty Butyl; Air Charge Type Factory Pre-Charged; Air Charge Capacity 50 PSIG; Inclusions/Features Projection Welded Air Valve, Turbulator Water Circulator, Stainless Steel System Connection; Application Closed, Potable Water System; Applicable Standard IAPMO R and T, ISO 9001, NSF/ANSI 61; Lead-Free