3/4" lead-free temperature and pressure relief valve with a 4" thermostat, designed for water heaters up to 105,000 BTU. Provides fully automatic temperature and pressure relief protection. Features a test lever and extension thermostat for installation in the hot water outlet line or directly in the tank tapping. The temperature sensing element must be immersed in the top 6" of the tank. Includes a 3/4" male inlet and 3/4" female outlet, with a temperature relief setting at 210°F and a pressure relief setting at 150 psi. Lead-free, certified to federal law.