Hydronic Expansion Tank;Type Vertical;Applicable Standard ASME, IS0 9001;Inlet/Outlet Connection 1/2" Female Threaded Center x 1/2" Female Threaded Center;Tank Material Red Oxide Primer Steel;Temperature Rating 240 Deg F;Pressure Rating 125 PSI;Tank Dimensions 16" Diameter x 45" Height;Tank Capacity 33.6 Gallon;Tank Warranty 1 Year;Diaphragm Type Heavy Duty Butyl/EPDM;Air Charge Type Factory Pre Charged;Air Charge Capacity 12 PSI;Options Sight Glass, Seismic Restraint;Inclusions/Features Schrader Air Valve with EPDM Seat;Application Closed, Non-Potable, Hydronic Heating System, Chilled Water System