Rheem-Ruud SP13422 Pilot Assembly

The Rheem-Ruud SP13422 Pilot Assembly is a direct OEM replacement designed for Natural Gas water heaters utilizing the Guardian FVIR system. This 18-inch pilot burner assembly includes a high-integrity thermocouple, pilot tube, and spark igniter, ensuring high-accuracy ignition and safety monitoring for PowerVent and standard draft units. For a technician in the field, this kit is the standard solution for "pilot won't stay lit" calls typically caused by a degraded thermocouple or a clogged pilot orifice.

Each SP13422 replacement kit comes complete with a new burner access door gasket, Tinnerman clips, and Torx head screws to maintain the air-tight seal required for the Flammable Vapor Ignition Resistant (FVIR) chamber. The 18-inch lead length provides ample slack for proper routing to the Honeywell or White Rodgers gas control valve. Using genuine Rheem replacement parts ensures that the millivolt signal remains within the manufacturer’s specified range, preventing premature gas valve shutdowns and nuisance lockouts in consistent high-demand residential applications.

• OEM Compatibility: Specifically engineered for Rheem, Ruud, and Richmond natural gas models with 18-inch chamber requirements.
• Complete Replacement Kit: Includes the SP13422 pilot assy, burner gasket, and mounting hardware for a full chamber reseal.
• Enhanced Reliability: Resolves frequent pilot outages and ignition failures caused by carbon buildup on the thermocouple tip.
• Safety Integration: Designed to interface seamlessly with the Thermal Release Device (TRD) and Guardian safety systems.

Is the SP13422 compatible with LP (Propane) units?
No, this assembly is strictly for Natural Gas (NG). The orifice size and threading are calibrated specifically for NG pressure regulators. Always verify the fuel type on the water heater rating plate before installation.

Why do I need to replace the burner door gasket?
Maintaining the FVIR seal is a code requirement. Reusing an old, compressed gasket can lead to combustion air leaks, potentially triggering the thermal switch or causing pilot outages due to improper drafting within the chamber.

What is the typical millivolt output for this thermocouple?
Under a healthy pilot flame, you should expect to see 10 to 30 millivolts. If the reading drops below 8-10 mV, the gas control valve solenoid will likely drop out as a safety precaution.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.