Temperature and Pressure Relief Valve Inlet Type MNPT Outlet Type FNPT Inlet Size 1 in Outlet Size 1 in Thermostat Length 4 3/4 in Body Height 6 in 2 155 000 BtuH Factory Set Pressure 150 psi Max Temp 210 Degrees F Shank Length Standard Auto Re-Seating Yes Body Material Bronze Spring Material Stainless Steel Body Width 2 1/2 in Standards Certified ANSI Z21.22 CSA CSA 4.4 Listed By ASME