Adjustable Relief Valve, Body Material PVC, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 2 in, Outlet Size 2 in, Factory Set Pressure 25 psi, Pressure Range 5 to 75 psi, Not Applicable BtuH, Disc Material PVC, Overall Height 15 1/2 in, Overall Length 5 in, Seat Material FPM, Spring Material Stainless Steel, Temp. Range 40 Degrees to 140 Degrees F, Test Lever Test Lever Not Included, Standards ASTM D1784