Safety Relief Valve, Body Material Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 in, Outlet Size 1 1/4 in, Factory Set Pressure 25 psi, 0 BtuH BtuH, Disc Material Stainless Steel, Overall Height 8 1/8 in, Overall Length 8 1/8 in, Spring Material Stainless Steel, Temp. Range -320 Degrees to 406 Degrees F, Test Lever Test Lever Not Included, Standards ASME Code UV, CE, CRN, NB