3", Water Heater Temperature & Pressure Valve, 3/4" Male NPT Inlet x Female NPT Outlet With 3" Long Shank, Designed To Protect Water Heaters From Overheating & Over Pressurization, Integral To Safe Operation Of The Water Heater, Fits Directly Into Water Heater, Temperature Relief 210 Degrees Fahrenheit, 99 Degrees Celsius Factory Setting Pressure 150 PSI Test Lever Standard, Drain Line Must Be Fitted To Temperature & Pressure Valve, Read Instruction Manual, CSA & ASME Listed, Certified ANSI Z21.22, 1 Year Warranty.