Lochinvar & A.O. Smith 100093794 Gas Valve

Looking for a direct replacement for your residential heating project? The Lochinvar & A.O. Smith 100093794 Gas Valve is a genuine OEM replacement part designed specifically for select natural gas water heaters and boiler models. This 1/2" NG gas valve is factory-calibrated for a 5" wc (water column) manifold pressure, ensuring precise fuel-to-air mixture ratios and stable combustion performance. Often identified by Robert Shaw manufacturer numbers like 100077890 or 9006432005, this assembly is the industry standard for maintaining the high-efficiency operation of Lochinvar and A.O. Smith tanks. Whether you are dealing with an ignition failure or a faulty solenoid, installing this 100093794 control valve restores the proper modulation needed for safe operation. Built for durability in high-demand environments, it provides the reliability required by professional contractors for long-term service. Verify your model and serial number before installation to ensure a proper fit with your specific natural gas appliance.

• Factory Calibrated: Pre-set to 5" wc for natural gas applications, eliminating the need for complex field adjustments during installation.
• OEM Integrity: As a genuine A.O. Smith gas valve, it meets original manufacturer specifications for safety and thermal performance.
• High Compatibility: Direct fit for 1/2" NPT connections, making it a drop-in HVAC replacement part for multiple Lochinvar and State residential units.
• Enhanced Flow Control: Precision-engineered 100093794 valve body ensures steady gas flow to the burner, preventing nuisance lockouts and overheating.

Is the 100093794 valve compatible with propane (LP) units?
No, this specific model is designed strictly for natural gas (NG). Using this on a propane system is dangerous and will cause improper combustion.

Can I use this to replace a valve with a different water column (wc) rating?
You must match the manifold pressure required by your appliance. If your unit calls for 5" wc, this is the correct technical match for your 1/2" gas line.

Why does my old valve have a different number on the side?
It is common for the Robert Shaw manufacturing number (like 100077890) to be stamped on the body, while the A.O. Smith 100093794 is the official service part number for the assembly.

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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.