Safety Relief Valve, Body Material Bronze, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1 1/4 in, Outlet Size 1 1/4 in, Factory Set Pressure 50 psi, Pressure Range 15 to 160 psi, 3,384,000 BtuH BtuH, Disc Material Brass, Overall Height 8 7/16 in, Application Heating, Overall Length 9 1/2 in, Seat Material Silicone, Spring Material Alloy Steel, Temp. Range 0 Degrees to 250 Degrees F, Test Lever Test Lever Included