Temperature and Pressure Relief Valve Inlet Type MNPT Outlet Type FNPT Inlet Size 1/2 in Outlet Size 1/2 in Thermostat Length 3 in Body Height 6 1/4 in 15 000 BtuH Factory Set Pressure 125 psi Max Temp 210 Degrees F Shank Length Standard Auto Re-Seating Yes Body Material Bronze Spring Material Stainless Steel Body Width 1 1/8 in Standards Certified ANSI Z21.22 And CSA 4.4