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The AO SMITH 100112351 is a final burner assembly kit designed for natural gas heating applications. This kit provides the burner components needed to deliver controlled combustion within a water heater or heating system burner assembly. The 18-inch configuration is matched with a 37 orifice, which governs gas flow and flame characteristics for the specific appliance it serves. Licensed plumbers and HVAC technicians typically specify and install this assembly during routine maintenance or component-level repairs on natural gas equipment.
This burner assembly kit is intended for heating applications running on natural gas. The 18-inch size and 37 orifice sizing make this kit specific to a defined range of equipment configurations. It serves as a direct replacement component in units requiring a final burner assembly of this dimension and orifice specification. Installation is typically performed during a scheduled service call or when diagnosing combustion performance issues in a natural gas heating appliance.
Designed as an OEM-style replacement final burner assembly kit for natural gas heating appliances requiring an 18-inch assembly with a 37 orifice.
Installation should be performed by a licensed plumber or qualified HVAC 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 burner assembly work. Do not attempt to modify the orifice or alter the assembly dimensions. Verify gas type compatibility before installation to confirm this natural gas kit matches the fuel supply at the installation site.
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