Ao Smith 100112276 Natural Gas Burner Assembly Kit 14in 39 Orifice

Product Description

The AO SMITH 100112276 is a 14-inch natural gas final burner assembly kit designed for residential and light commercial water heater heating systems. This kit provides the complete burner assembly needed to restore proper combustion function in natural gas appliances. Featuring a 39 orifice configuration, it meters gas flow to support consistent flame output. Licensed plumbers and HVAC technicians typically install this component as a direct replacement during burner failure or routine maintenance. The assembly is matched to natural gas (NG) fuel type and is not suitable for liquid propane systems without conversion.

This burner assembly kit is intended for heating applications where the original burner has degraded, become clogged, or failed outright. The 14-inch form factor and 39 orifice specification make it appropriate for specific AO SMITH water heater units requiring this size and gas type. It is suited for service calls involving loss of heat, irregular flame patterns, or burner component damage diagnosed during inspection.

Key Features

• 14-inch burner assembly sized for compatible AO SMITH water heater units
• 39 orifice configuration for natural gas fuel metering
• Natural gas (NG) fuel type — not for propane use without conversion
• Complete assembly kit format supports direct replacement without fabrication
• Heating application rated for water heater combustion systems

Compatibility

Designed as an OEM-style replacement burner assembly kit for AO SMITH natural gas water heaters requiring a 14-inch final burner assembly with a 39 orifice. Consult the unit model tag and service documentation to confirm fitment before installation.

Installation Notes

Installation should be performed by a licensed plumber or qualified gas appliance technician in accordance with local codes and IFGC requirements. Shut off the gas supply and allow the appliance to cool completely before disassembling the burner compartment. Verify that the replacement assembly matches the original orifice count and burner length prior to installation. Do not operate the appliance on a fuel type other than what is indicated on the unit nameplate and confirmed by the orifice specification.

Technical Specifications

• Burner Length: 14 inches
• Fuel Type: Natural Gas (NG)
• Orifice Count: 39
• Application: Heating

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100112276