Lochinvar & A.O. Smith 100109812 Gas Valve

The Lochinvar & A.O. Smith 100109812 Gas Valve is a critical OEM component designed for high-performance water heating systems. Engineered with a precision 3.5" WC manifold pressure setting, this natural gas control valve ensures stable combustion and efficient heat generation in demanding commercial and residential environments. As a direct replacement for the 180193-4 gas valve, it provides the exact voltage and flow characteristics required to maintain system safety and fuel economy. Technicians often encounter the 100109812 water heater valve when troubleshooting ignition failures or erratic burner behavior in Lochinvar and A.O. Smith units. Utilizing genuine HVAC replacement parts like this one is essential for maintaining the factory-specified air-to-fuel ratio and preventing premature component wear. Whether you are performing a routine service or a complex gas valve troubleshoot, this valve offers the reliability needed to restore peak thermal efficiency and ensure consistent hot water delivery.

Key Benefits:

• OEM Compatibility: Guaranteed fit for specific Lochinvar and A.O. Smith models, replacing legacy part numbers including 9004353105 and 180193-4.
• Precise Regulation: Factory-set to 3.5 inches Water Column (WC) for optimal natural gas combustion.
• Durable Construction: Built with high-grade internal components to withstand the cycling demands of commercial-grade water heaters.
• Enhanced Safety: Integrated gas control mechanisms prevent unregulated fuel flow, protecting both the equipment and the facility.

Common Questions:

Is the 100109812 gas valve compatible with Propane (LP)?
No, this specific model is calibrated for Natural Gas (NG) applications. Using it with Propane without a certified conversion kit can lead to hazardous operating conditions.

What are the signs that my current gas valve 180193-4 needs replacement?
Common symptoms include a pilot that won't stay lit, the main burner failing to ignite despite a call for heat, or inconsistent manifold pressure readings during a combustion analysis.

Can I adjust the 3.5" WC setting on this valve?
While some valves allow for minor field adjustments, it is highly recommended to stick with the factory 3.5-inch WC setting unless the specific appliance manual dictates otherwise for high-altitude installations.

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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.