Ao Smith 100187914 Natural Gas Burner Assembly 18 in

Product Description

The AO SMITH 100187914 is an 18-inch natural gas final burner assembly kit designed for residential and light-commercial water heater heating systems. This kit includes the final burner component fitted with a 34 orifice, delivering properly metered gas flow for consistent ignition and combustion performance. It is a direct service part intended for use in natural gas-fired water heater applications and is typically installed by licensed plumbers or gas appliance technicians during burner replacement or combustion system service.

This burner assembly kit is suited for heating applications where the original final burner has worn, corroded, or failed. The 18-inch size and 34 orifice specification make it a fit-specific replacement rather than a universal part. It belongs in natural gas water heater systems and is not rated for liquid propane or other fuel types. Technicians should confirm the orifice size and overall assembly length against the existing installation before ordering.

Key Features

• 18-inch assembly length sized for compatible AO SMITH natural gas water heater burner chambers
• 34 orifice provides metered gas flow for correct combustion characteristics
• Natural gas fuel type — not interchangeable with LP or propane configurations
• Final burner kit format includes the assembly components needed for a complete burner replacement
• Direct service replacement designed for heating applications

Compatibility

Designed as an OEM-style replacement burner assembly for AO SMITH natural gas water heaters requiring an 18-inch final burner with a 34 orifice. Confirm model compatibility using the unit's rating plate and service documentation before installation.

Installation Notes

Burner assembly replacement on gas water heaters must 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 at the service valve and allow the unit to cool completely before beginning disassembly. Inspect the gas valve, thermocouple, and igniter connections before reinstalling the new assembly. Never restore gas supply without performing a leak check at all connections using an approved leak-detection solution.

Technical Specifications

• Fuel Type: Natural Gas (NG)
• Assembly Length: 18 inches
• Orifice Size: 34
• Application: Heating
• Product Type: Burner Assembly

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100187914