Lochinvar & A.O. Smith 100110218 Gas Valve

The Lochinvar & A.O. Smith 100110218 Gas Valve is a heavy-duty, 1-inch NPT slow-opening control designed for high-recovery commercial water heaters and boilers. Engineered for precision and safety, this 24V gas valve is factory-set for natural gas applications with a 3.5" WC (water column) manifold pressure. As an OEM replacement part, it serves as the direct updated version of the legacy 9005017205 model, ensuring seamless mechanical and electrical integration without field modifications.

For technicians in the field, this redundant gas valve provides reliable combustion control by sensing negative pressure from the blower, allowing gas flow only when the proper air-fuel ratio is established. The slow-opening characteristic prevents hard ignitions and reduces stress on the burner assembly, extending the service life of the heat exchanger. Whether you are servicing a Lochinvar boiler or an A.O.-Smith commercial water heater, this 100110218 valve maintains the rigorous performance standards required for high-input atmospheric and power-vented systems.

• Direct OEM Replacement: Replaces specialized part number 9005017205 with exact fitment for A.O. Smith and Lochinvar units.
• Optimized Combustion: Features a 3.5" WC Nat regulated setting to ensure consistent BTU input and peak thermal efficiency.
• Enhanced Safety: Built with a 24V redundant coil system to provide immediate shut-off if the flame signal or power is interrupted.
• Industrial Build: Heavy-duty 1-inch gas connection designed to handle the high flow rates of commercial-grade heating equipment.

• What is the difference between this and the 9005017205? The 100110218 is the current manufacturer-authorized replacement, incorporating updated internal components while maintaining the original technical specifications.
• Can this 1" gas valve be converted to Liquid Propane (LP)? This model is specifically calibrated for Natural Gas at 3.5" WC. Field conversion is not recommended unless using a manufacturer-certified conversion kit specific to the appliance model.
• How do I verify if this valve is compatible with my boiler? Check the rating plate on your appliance. This HVAC gas valve is typically found in high-output Lochinvar and A.O. Smith Power-Fit or Cyclone series models.

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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.