Resideo 396221/U Single Stage Natural to LP Gas Conversion Kit, 8 in WC to 12 in WC Adjustment Range

Natural gas to LP conversion kit from Resideo (Honeywell Home), part number 396221/U, for single stage gas valves, changing the manifold setting from 8 in WC to 12 in WC.

Converting an appliance between natural gas and propane is not a setting change. The two fuels carry very different energy per cubic foot and run at different manifold pressures, so the conversion swaps the metering parts in the valve and resets the regulator to the pressure the other fuel needs.

Going from natural gas to propane means closing the appliance down. Propane is far denser in energy, and an appliance left on natural gas orifices after a propane conversion will overfire — sooting, a lifting flame, and a heat exchanger running well past what it was designed for.

Gas appliance safety. A gas valve must match the appliance it is fitted to — ignition system, capacity, inlet pressure and gas type. Replacement is work for a licensed gas technician, and the appliance manufacturer's parts list is what decides the correct valve, not the physical fit of the threads. If the replacement does not match, the appliance can fail to light, fail to prove flame, or overfire.

• Brand: Resideo (Honeywell Home)
• Manufacturer Part #: 396221/U
• Conversion: Natural gas to LP
• Valve staging: Single Stage
• Manifold pressure: 8 in WC to 12 in WC
• UPC: 085267263108
• Category: Gas Conversion Kits