Temperature and Pressure Relief Valve, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Thermostat Length 7 7/8 in, Body Height 11 3/8 in, 500,000 BtuH, Factory Set Pressure 150 psi, Max. Temp. 210 Degrees F, Shank Length 1-3/16 in, Auto Re-Seating Yes, Body Material Bronze, Spring Material Stainless Steel, Body Width 1 15/32 in, Standards ANSI Z21.22, ASME, CSA, Compliance ASME Boiler Code SECT IV