Lochinvar & A.O. Smith 100346617 Burner Assembly

The Lochinvar & A.O. Smith 100346617 Burner Assembly is a factory-authorized OEM heating replacement part engineered for high-efficiency residential and commercial water heaters. This 18-inch Ultra Low NOx (ULN) burner assembly is the direct replacement for the obsolete part number 100342835. It features an integrated gas valve (1-inch cavity) and TCO (thermal cut-off) to ensure precise fuel modulation and combustion safety. Designed specifically for Ultra Low NOx water heaters, this component meets strict environmental emissions standards while maintaining consistent thermal output. The assembly is built with durable stainless steel elements to withstand high-temperature cycling and resist corrosion. For field technicians and contractors, using this genuine Lochinvar replacement burner ensures exact fitment and restores original equipment performance levels, critical for maintaining the operational integrity of the venting and combustion system. Always verify the water heater serial number to confirm compatibility with this specific 18-inch configuration before installation.

• Direct OEM Replacement: Seamlessly replaces discontinued part number 100342835 without the need for field modifications.
• Complete Combustion Solution: Includes both the burner assembly and a 1-inch gas valve for a comprehensive system overhaul.
• Regulatory Compliance: Engineered as an Ultra Low NOx burner to meet specialized air quality requirements for heating equipment.
• High-Grade Construction: Features heavy-duty materials designed for extended heating system lifecycle and reliability.
• Optimized Performance: Provides a factory-calibrated gas flow to maintain energy efficiency and reduce operational downtime.

Is this burner assembly compatible with any 18-inch water heater?
No, the 100346617 is specifically designed for Lochinvar and A.O. Smith Ultra Low NOx residential and commercial models. You must check the serial number on the unit's rating plate to ensure a match, as this is not a universal burner.

Does this assembly include the gas control valve?
Yes, this 100346617 burner assembly comes as a complete kit including the 1-inch cavity gas control valve and relevant safety components for a full installation.

What was the previous part number for this item?
This item is the direct manufacturer-recommended replacement for the 100342835 part number.

This item is not eligible for free shipping.

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.