Lochinvar & A.O. Smith 100111372 Gas Valve

The Lochinvar & A.O. Smith 100111372 Gas Valve is an essential replacement component for commercial water heaters and boilers requiring precise fuel regulation. This specific 1/2" NPT gas valve is factory-set for Liquid Propane (LP) operation with a 10" WC manifold pressure setting, ensuring stable combustion across high-firing cycles. Engineered for high-output systems, the 100111372 manages gas flow through an integrated solenoid and regulator assembly, providing reliable ignition and flame modulation. When performing a Lochinvar gas valve replacement, technicians should verify the model number against the data plate to ensure compatibility with Armor and Shield boilers. Proper installation requires a digital manometer to confirm incoming line pressure and outlet manifold pressure match the 10" WC specification. Utilizing this OEM part maintains the original equipment’s efficiency ratings and safety certifications, preventing the nuisance lockouts often associated with aftermarket equivalents in A.O. Smith water heater repair scenarios.

• Precise LP Regulation: Factory-calibrated for 10" Water Column (WC) to ensure optimal fuel-to-air ratios in Liquid Propane applications.
• OEM Compatibility: Exact drop-in replacement for specific Lochinvar and A.O. Smith commercial units, eliminating the need for field modifications.
• Durable Solenoid Design: Built to withstand commercial duty cycles and provide consistent valve actuation over long-term operation.
• Standard 1/2" Fitting: Features standard 1/2" NPT inlet and outlet ports for straightforward piping integration with existing gas trains.

Common Questions

Can this gas valve be converted to Natural Gas?
The 100111372 is specifically configured for LP at 10" WC. It is recommended to use the dedicated Natural Gas part number rather than attempting field conversion to ensure the internal regulator spring remains within manufacturer specifications.

What are the symptoms of a failing 100111372 valve?
Technicians often encounter "No Ignition" or "Flame Loss" codes. If the igniter glows and the control board sends 24V to the solenoid but no gas flows, the valve has likely failed mechanically or electrically.

Is field adjustment of the manifold pressure required?
While factory-preset, technicians must always verify the manifold pressure during commissioning using a manometer to account for specific site altitude and supply line variations.

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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.