Lochinvar & A.O. Smith 100110774 Valve

Maximize the performance of your residential heating systems with the Lochinvar & A.O. Smith 100110774 Valve. This genuine OEM replacement gas valve is engineered for precision in natural gas appliances, featuring a 120V operating voltage and a factory-set 4" WC (Water Column) regulator for stable manifold pressure. Built for reliability in high-demand environments, this 1/2" NPT gas control valve replaces several legacy part numbers including 9005962005, 100045416, and 184960-000. As a veteran-grade White Rodgers Intellivent component, it integrates a 1.25" shank and reliable thermocouple/pilot safety mechanisms, ensuring 100% gas shutoff if the pilot flame is lost. This is not a universal part; it is specifically designed for Lochinvar Knight and A.O. Smith residential water heaters. For technicians troubleshooting ignition failure or GV relay fail codes, ensure your wiring harness and control board voltage are within spec before installation to maintain optimal combustion efficiency and HVAC system safety.

• Precise Pressure Regulation: Fixed 4" WC setting ensures consistent natural gas flow for efficient burner operation.
• Enhanced Safety: Built-in Intellivent technology provides 100% shutoff in the event of pilot failure.
• OEM Compatibility: Exact fit for A.O. Smith and Lochinvar units, eliminating the risks associated with aftermarket or generic valves.
• Standard Connections: Features 1/2" NPT inlet/outlet and a 1.25" shank for straightforward field replacement.
• High-Voltage Stability: Optimized for 120V circuits to prevent relay chatter and intermittent ignition lockouts.

Is this valve compatible with LP (Propane) systems?
No, this specific model is calibrated for Natural Gas (NG) only. Using this in an LP conversion without the correct orifice and regulator kit is unsafe.

What does the 'GV Relay Fail' code mean on my Lochinvar Knight boiler?
This often indicates that the control board is not detecting the valve. Before replacing the 100110774, check the black Molex connector and wiring harness for continuity and proper 120V signal.

Can I adjust the manifold pressure on this valve?
This valve is factory-set to 4" Water Column. While typically fixed, always use a manometer to verify pressure at the tap during high-fire operation to ensure it meets the appliance nameplate requirements.

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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.