Lochinvar & A.O. Smith 100109913 Gas Valve

The Lochinvar & A.O. Smith 100109913 Gas Valve is a 24V slow-opening natural gas valve engineered for precision fuel regulation in commercial water heaters and boilers. Designed with a 3/4" NPT inlet and outlet, this combination gas valve serves as a critical component for maintaining stable manifold pressure, factory-preset at 3.5" W.C. to ensure optimal combustion efficiency. This OEM replacement gas valve is a direct substitute for the A.O. Smith 9004527205 and is compatible with BTC-120 through BTC-400 series units, as well as the Lochinvar Copper-Fin II series. By utilizing a redundant valve seat design and an adjustable main pressure regulator (range of 3.0" to 5.0" W.C.), it provides the reliable ignition and modulation required for high-efficiency HVACR applications. For technicians troubleshooting pilot-outage issues or main burner failure, this valve offers the standard 24VAC control circuit integration necessary for seamless field installation.

• Broad Compatibility: Serves as a primary service part for A.O. Smith BTC and Lochinvar Copper-Fin commercial systems.
• Enhanced Safety: Features a redundant solenoid design to ensure positive shut-off and prevent gas leakage.
• Precise Modulation: Includes an adjustable pressure regulator to fine-tune the gas-to-air mixture for peak thermal efficiency.
• Durability: Built for high-demand commercial environments, providing consistent performance under varying dynamic gas pressure loads.

• Can this valve be converted for Liquid Propane (LP) use? No, this is a dedicated NAT GAS VALVE. Modifying this component for LP without a manufacturer-approved conversion kit is not recommended due to orifice and regulator spring differences.
• What are the symptoms of a failing 100109913 valve? Common indicators include the main burner failing to ignite despite a 24V signal, short cycling, or inconsistent outlet pressure during the firing sequence.
• What is the maximum inlet pressure for this unit? The maximum supply pressure limit is typically 14" W.C.; exceeding this can damage the internal diaphragm and regulator.

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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.