GAS VALVE, White Rodgers (An Emerson Brand) #37C73U-715 & is often cross-referenced with Bradford White part # 222-40251-01B, Storage Tank Manual Water Heater Temperature Control Gas Valve with dual wire leads for external 188-195 degree Fah. ECO Burner Chamber Temperature Sensor. For Natural Gas Only, 3.5" WC, 40,000 BTU/hr., with 5/8" deep Brass Temperature Sensor Probe Insert Housing. This Gas Valve has been Cleaned & Bench Tested for proper function & temperature accuracy. This is a Pre-owned Gas Valve & is sold with a 90-day Warranty if Installed by a Licensed Plumber.