Safety Relief Valve, Body Material Bronze, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 2", Outlet Size 2", Factory Set Pressure 100 psi, Pressure Range 15 to 160 psi, BtuH 13,577,000, Disc Material Brass ASTM B16, Overall Height 14", Application Hot Water Heating Boilers and Hot Water Supply Systems, Overall Length 7-3/16", Seat Material Silicone, Spring Material Plated Alloy Steel, Temp. Range 0 Degrees to 250 Degrees F, Test Lever Yes, Standards ASME Section IV, CSA, CRNWARNING: California ResidentsThis product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.