LPG Gas Conversion Kit for Williams Forsaire Direct-Vent 400 Series model numbers 4007731 and 4007331. Convert your Forsaire propane furnace, model numbers 4007731 and 4007331, into a natural gas version. Kit contains all items necessary for conversion from propane gas to natural gas.
- Propane to natural gas (LP) conversion
- Includes all components to correctly change gas types
- Easy to follow instructions
- Conversion certificate and labels included