Temperature and Pressure Relief Valve, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Thermostat Length 3 1/16 in, Body Height 3 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 Steal, Body Width 1 5/32 in, Standards ANSI Z21.22, CSA 4.4, Compliance ANSI Z21.22/CSA 4.4 WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. -