Lochinvar & A.O. Smith 100135317 Burner Tube

For veteran HVAC contractors, the Lochinvar & A.O. Smith 100135317 Burner Tube is a direct-fit OEM replacement part engineered for high-efficiency boiler and water heater combustion systems. This burner assembly includes a precision barbed fitting, ensuring a secure connection for differential pressure switches or gas-air ratio valves. Identified as a cross-reference for part number BNR3502, this component is critical for maintaining peak thermal efficiency and consistent flame patterns in commercial and residential heating units. Designed for the Lochinvar Knight and CFN0990 series, this burner tube manages high-BTU loads while minimizing carbon buildup. Proper installation of this gas burner tube involves verifying the screw-neck gasket integrity to prevent bypass leakage. When troubleshooting 100135317 compatibility, technicians should note its application in A.O. Smith gas water heaters and Lochinvar boilers requiring a reliable replacement burner assembly for stable combustion performance and system longevity.

• Direct OEM Interchange: Fully compatible with part number BNR3502 for seamless field replacement without modifications.
• Robust Combustion Performance: Engineered to withstand the thermal stresses of high-output heating applications, reducing service calls.
• Integrated Barbed Fitting: Facilitates accurate pressure monitoring and air-fuel ratio maintenance for safety compliance.
• Precision Machined: Minimizes turbulence within the tube to provide a stable flame and prevent resonant noise during startup.

Is the 100135317 compatible with both Lochinvar and A.O. Smith units?
Yes, this burner is a shared OEM component utilized across several high-efficiency platforms from both manufacturers, including the CFN series.

Does this burner assembly include the required gaskets?
This specific SKU often includes a screw-neck gasket, but it is standard practice to inspect and replace all mating seals to ensure airtight combustion.

How can I identify if my burner tube needs replacement?
Technicians should look for signs of soot accumulation, warped metal, or irregular flame patterns that suggest poor air-fuel mixing or physical degradation of the tube.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.