• Trade replacement valve for all AO Smith® brand standard NoX water heaters with 1 in insulation The direct purchasing option allows you to order products straight from resideo Easily service AO Smith® and Bradford White natural gas water heaters, even if you don't usually service them Convenient status LED trims repair time to around 30 min Resettable emergency temperature cut-off reduces cost and labor time by eliminating valve replacement A larger pilot flame reduces customer callbacks Accurate temperature sensing improves comfort and eliminates scalding risk Smart anti-scaling algorithms protect children and the elderly from water exceeding the set point

The WT8840 Series is the water heater control for trade use to replace WV8840 valves used in AO Smith® and Bradford White® water heaters. It is designed for use in standing pilot applications using an immersion well for water temperature sensing. An included integrated NTC temperature sensor reads water temperature within the appliance up to 221 deg F.