Expansion Tank; Inlet/Outlet Connection 3/4" Male Threaded; Tank Capacity 4.4 Gallon; Tank Material Carbon Steel Shell; Tank Inner Lining Polypropylene; Temperature Rating 200 Deg F; Pressure Rating 150 PSI; Precharge Pressure 38 PSI; Diaphragm Material Butyl; Tank Dimensions 11" Diameter x 15" Height; Application Residential/Commercial Potable Water