Lochinvar & A.O. Smith 100110220 Gas Valve

The Lochinvar & A.O. Smith 100110220 Gas Valve is a critical replacement component designed for high-efficiency water heaters and boilers, including many models in the Lochinvar Copper-Fin II and Knight series. This 1-inch NPT natural gas valve operates on a 24V control circuit and is factory-set to a 3.5" water column (WC) outlet pressure, ensuring the precise fuel-to-air mixture required for clean combustion. As a direct replacement for part number 9005019105, it maintains the integrity of the original equipment manufacturer (OEM) specifications, which is vital for preventing flame failure and ensuring consistent ignition. Constructed for durability in demanding commercial and residential environments, the 100110220 gas control valve features redundant internal seats for enhanced safety and a negative pressure regulation design that responds to blower signals. For technicians, this means simplified troubleshooting and a reliable solution for units experiencing gas valve solenoid failure or erratic burner behavior. This genuine A.O. Smith gas valve kit is engineered to withstand the rigorous duty cycles of modern condensing and non-condensing hydronic systems.

• OEM Compatibility: Precision-engineered for Lochinvar and A.O. Smith systems to ensure seamless integration with the existing control board.
• Optimal Pressure Regulation: Pre-configured for 3.5" WC natural gas applications to maintain high thermal efficiency.
• Enhanced Safety: Features redundant valve seats to prevent gas leakage and ensure reliable shut-off.
• Standardized Connections: Utilizes 1-inch NPT inlet/outlet ports for industry-standard piping installations.

What are the symptoms of a failing 100110220 gas valve?
Technicians often encounter ignition lockout codes, "no flame detected" errors, or an audible hum from the solenoid without gas flow. Verifying 24V at the valve during the ignition sequence is the standard diagnostic step.

Can this valve be converted to Liquid Propane (LP)?
The 100110220 is specifically designed for Natural Gas. Conversion to LP requires a specific conversion kit or a different valve model as dictated by the equipment manufacturer’s service manual.

Is this a direct replacement for 9005019105?
Yes, the 100110220 is the official replacement kit for the legacy 9005019105 part number, ensuring identical fitment and performance.

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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.