Rheem sp13421 Pilot Assembly Liquid Propane 18 in

Product Description

The RHEEM sp13421 is an 18-inch pilot assembly designed for liquid propane (LP) water heaters and heating appliances. The pilot assembly delivers a continuous flame signal to the thermocouple or thermopile, allowing the main burner to ignite and maintain operation. It is a direct OEM replacement part, matched to RHEEM specifications for fuel type and assembly length. Licensed plumbers and HVAC technicians are the typical installers for this component during routine service or burner system repair.

This pilot assembly is rated for liquid propane fuel systems and measures 18 inches in length, making it suited for standard residential water heater and furnace configurations that require an LP-compatible pilot. It is intended for use in LP gas appliances where the existing pilot assembly has failed, corroded, or no longer holds a flame reliably.

Key Features

• Configured for liquid propane fuel — not compatible with natural gas systems
• 18-inch assembly length fits standard residential appliance pilot brackets
• OEM replacement part manufactured to RHEEM specifications
• Designed for reliable flame delivery to thermocouple or thermopile sensing elements

Compatibility

Designed as an OEM-style replacement pilot assembly for RHEEM liquid propane water heaters and heating appliances requiring an 18-inch LP pilot assembly.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with local codes and the appliance manufacturer service instructions. Shut off the LP gas supply at the tank or service valve and allow the appliance to cool completely before beginning any pilot assembly work. Verify the replacement assembly matches the fuel type of the appliance — LP and natural gas pilot assemblies are not interchangeable. Follow all IFGC guidelines for gas appliance service and leak-test all connections after reinstallation.