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The AO SMITH 100112339 is a propane (LP) gas valve designed for residential and commercial water heater applications. It controls gas flow to the burner and regulates water temperature within the unit. Rated at 10 inches water column (WC), this valve serves as a direct OEM-style replacement for water heaters that specifically call out part number 100112339. Installation is performed by a qualified service technician following the water heater manufacturer's service manual. This valve is LP/propane-specific and is not interchangeable with natural gas valve configurations.
This valve is listed under AO SMITH water heater parts in the gas valves category for commercial applications. It is intended for use only on units where the manufacturer specifies part number 100112339 as the correct replacement. Compatibility should always be confirmed against the water heater's model number and serial number before ordering. This part has been confirmed as a direct replacement for WV8840B5077 in documented service cases. It is not a universal cross-brand substitute.
This valve is compatible with AO SMITH water heaters that specifically call out part number 100112339 as the approved replacement. Confirmed to replace part numbers WV8840B5077, 100093978, 9007891005, and 6911136 in applicable units. Compatibility must be verified against the water heater's model number and serial number. This valve is not a universal replacement for other brands or fuel types.
Installation must be performed by a qualified service technician holding the appropriate trade license for gas appliance work. Shut off the gas supply and disconnect power to the water heater before beginning any service procedure. Follow the water heater manufacturer's service and installation manual for the approved valve removal and replacement procedure, including leak testing after reinstallation. Some service situations involve difficulty removing the existing valve body from the tank — consult the equipment documentation for the manufacturer-approved service method before proceeding.
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