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The A.O. SMITH 100109253 is a flammable vapor (FV) pilot assembly designed for propane (LP) water heaters and heating equipment. The pilot assembly generates the small, continuous flame required to ignite the main burner on demand. It is rated for a temperature of 170 degrees F, which is consistent with flammable vapor ignition resistance requirements. This component is a direct OEM-style replacement part typically installed by licensed plumbers or gas appliance service technicians during routine maintenance or burner system repair.
This pilot assembly is intended for propane-fueled heating applications. It is suited for residential water heaters and similar gas appliance configurations where the FV pilot system is the specified ignition method. Install in systems where the original equipment calls for an LP-rated pilot assembly at the 170 degrees F specification. Only use in propane applications — do not substitute for natural gas pilot assemblies without manufacturer confirmation of compatibility.
Designed as an OEM-style replacement pilot assembly for A.O. SMITH propane-fueled heating equipment requiring the FV pilot configuration at a 170 degrees F temperature rating.
Installation should be performed by a licensed plumber or qualified gas appliance technician in accordance with local codes and the appliance manufacturer's service documentation. Shut off the gas supply and allow the appliance to cool completely before beginning any pilot assembly service. Verify fuel type compatibility before installation — this assembly is rated for propane (LP) only. Follow all applicable fuel gas codes, including IFGC requirements, when servicing gas-fired appliance components.
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