Lochinvar & A.O. Smith 100108829 Gas Valve

The Lochinvar & A.O. Smith 100108829 Gas Valve is a critical combustion control component designed for high-efficiency commercial boilers and water heaters. This 120V gas valve is factory-calibrated for Liquid Propane (LP) applications with a 10" WC manifold pressure setting. Engineered for precise fuel-to-air ratio control, this direct spark ignition gas valve ensures stable burner performance and reliable light-offs under varying thermal loads. As an OEM replacement part, it maintains the original equipment’s UL/CSA safety certifications and combustion parameters. The 100108829 is frequently utilized in Lochinvar Knight and A.O. Smith Cyclone series units, providing a seamless mechanical fit and electrical interface. When performing a gas valve replacement, verify the specific BTU/hr input and orifice configuration of the heat exchanger to ensure optimal CO2 levels. Its robust solenoid construction is designed to withstand the high-cycle demands of commercial hydronic systems.

Key Benefits

• Precision Pressure Regulation: Pre-set for 10 inch water column LP gas pressure to ensure consistent burner flame stability.
• Vibration-Resistant Solenoid: Built to handle the rapid cycling requirements of modern condensing boilers.
• OEM Compatibility: Exact replacement for Lochinvar 100108829 and A.O. Smith 100108829, eliminating the need for field modifications.
• Enhanced Safety Integration: Interfaces directly with the integrated control board for immediate fuel shut-off if a flame failure is detected.

Common Questions

Which Lochinvar models use the 100108829 gas valve?
This valve is a standard component in several Lochinvar Knight XL and Knight heating boilers. Technicians should always check the part number on the existing valve or the unit wiring diagram to confirm the 120V requirement.

Can this LP gas valve be converted to Natural Gas?
This specific configuration is rated for LP gas. Conversions generally require a specific kit from the manufacturer to ensure the correct spring and orifice pressures; utilizing a 10" WC valve on an NG system without proper modification will lead to hazardous combustion conditions.

What are the symptoms of a failing boiler gas valve?
Primary indicators include "No Flame" ignition lockout codes, erratic burner resonance, or the failure of the valve to open despite receiving a 120V signal from the ignition module.

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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.