Lochinvar & A.O. Smith 100110273 Gas Valve

The Lochinvar & A.O. Smith 100110273 Gas Valve is a critical OEM replacement component designed for high-recovery residential water heaters. This 120V natural gas valve features a 4" WC pressure rating and a 1/2" NPT inlet, specifically engineered for the A.O. Smith GPDH, GPDT40, and GPDT50 series. As a precision-calibrated gas control valve, it utilizes a 1.45" shank to ensure proper seating and thermal sensing within the tank. For technicians troubleshooting ignition failure or erratic burner behavior, replacing the existing assembly with this genuine 100110273 water heater part restores factory-spec manifold pressure and flow modulation. This valve is built to handle the cycling demands of power-vented units, maintaining consistent BTU output and safety shut-off integrity. Verified compatibility includes various ProLine Master and State Select models where 120V ignition logic is required.

Technical Specifications & Benefits

• Direct OEM Replacement: Ensures seamless integration with A.O. Smith and Lochinvar control systems without field modifications.
• Precise Pressure Regulation: Fixed 4" WC natural gas setting maintains optimal combustion efficiency and burner flame stability.
• Industrial Build Quality: Heavy-duty construction designed to withstand the high-temperature environment of residential boiler and water heater applications.
• Standardized Connections: Features a 1/2" gas inlet and 1.45" shank for straightforward mechanical installation.
• Voltage Compatibility: Engineered for 120V electrical circuits commonly found in power-vented and high-efficiency gas units.

Common Questions

Is the 100110273 gas valve compatible with propane (LP) units?
No, this specific part is calibrated for natural gas water heaters at a 4" water column. Using this on liquid propane systems without a manufacturer-approved conversion kit is unsafe.

What are the signs that a Lochinvar 100110273 valve needs replacement?
Common indicators include the burner failing to ignite despite a call for heat, erratic manifold pressure readings, or the 120V solenoid failing to open during the ignition sequence.

Does this valve include the internal thermostat/high-limit switch?
Yes, this is a complete gas control assembly featuring the shank-mounted sensing element to monitor water temperature and provide emergency high-limit shut-off.

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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.