Adjustable Back Pressure Relief Valve Body Material Stainless Steel Inlet Type FNPT Outlet Type FNPT Inlet Size 3/4 in Outlet Size 3/4 in Factory Set Pressure 175 psi Disc Material Stainless Steel Overall Height 8 in Overall Length 5 5/8 in Seat Material Stainless Steel Spring Material Stainless Steel Temp Range 40 Degrees to 450 Degrees F Test Lever No Standards CRN CSA