Safety Relief Valve Body Material Cast Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 3/4 in Outlet Size 3/4 in Factory Set Pressure 150 psi Pressure Range 75 to 150 psi 934 000 BtuH Disc Material Silicone Overall Height 3 1/4 in Application Hot Water Supply Systems Seat Material Silicone Spring Material Stainless Steel Temp Range 0 Degrees to 250 Degrees F Test Lever Yes Standards ASME Section IV CRN CSA