NEW (Old Stock) Hot Water Heater Boiler Relief Valve, NCLX-5, 3/4 x 3/4, Automatic Reseating, Pressure Temperature Relief Valve with Test Lever and 3" Extension Thermostat - 210F and 150 psig with "White Coat" protective coated thermal element Rated for 500,000 BTU/Hr Maximum Heater Input