Ao Smith 100109273 Ng Final Burner Assembly Kit 37 Orifice

Product Description

The AO SMITH 100109273 is a natural gas final burner assembly kit designed for residential and light commercial water heater systems. It includes a 37-orifice configuration sized for natural gas fuel delivery, making it a direct replacement component for the combustion assembly in compatible AO SMITH water heaters. Licensed plumbers and HVAC service technicians install this kit during combustion section repairs or when the original burner assembly shows wear, blockage, or failure. The assembly provides the final stage of gas delivery and flame production, playing a central role in consistent water heating performance.

This burner assembly kit is intended for heating applications using natural gas. It is suited to water heater units that rely on a multi-orifice final burner configuration. The 37-orifice design is specific to certain AO SMITH water heater platforms and is not a universal fit. Always verify the unit model number and existing burner configuration before ordering. This kit is a service replacement part, typically installed during warranty or post-warranty combustion system repairs.

Key Features

• Configured for natural gas (NG) fuel systems
• 37-orifice design for precise gas distribution across the burner
• Complete kit format simplifies combustion section service calls
• Direct OEM-style replacement for compatible AO SMITH water heaters

Compatibility

Designed as an OEM-style replacement burner assembly kit for AO SMITH natural gas water heaters that use a 37-orifice final burner configuration. Verify the model number and existing burner assembly part number against the unit service manual before installation.

Installation Notes

Installation should be performed by a licensed plumber or qualified gas appliance technician in accordance with local codes and the International Fuel Gas Code (IFGC). Shut off the gas supply and allow the unit to fully cool before disassembling the combustion section. Inspect all gas connections for leaks using an approved leak-detection solution after reassembly. Do not attempt to modify the orifice configuration or substitute components not specified for this assembly.

Technical Specifications

• Fuel Type: Natural Gas (NG)
• Application: Heating
• Orifice Count: 37

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100109273