Dometic/Atwood RV water heater pressure and temperature relief valve / brass P&T valve, 1/2″ fitting. Temperature relief is 210°. Pressure relief is 150 psi. Measures about 7.25″ x 1.5″ overall. Watts 1921W.
OEM replacement part for class A Winnebago motorhomes. Also used on other makes and models of RV’s. Winnebago part number 051391-01-704.
Similar valve with 3/4″ fitting: RV Water Heater Pressure Relief Valve 3/4″ 051391-03-701
