Water Heater Expansion Tank; Type Bladder, Vertical; Applicable Standard ASME; Inlet/Outlet Connection 1" Threaded x 1" Threaded; Temperature Rating 240 Deg F; Pressure Rating 125 PSI; Tank Dimensions 16" Diameter x 51-1/4" Height; Tank Capacity 35 Gallon; Diaphragm Type Heavy-Duty Butyl Rubber; Air Charge Capacity 12 PSIG; Options California Sight Glass, (4) Seismic Clip; Inclusions/Features Steel Shell