Lochinvar & A.O. Smith 100275532 Gas Valve Assembly

The Lochinvar and A.O. Smith 100275532 Gas Valve Assembly is a critical combustion control component engineered for precise fuel metering in high-efficiency condensing water heaters and commercial boilers. This negative pressure regulated gas valve (frequently cross-referenced with part number 100110300) is designed to maintain the correct air-to-gas ratio across varying firing rates. Constructed for durability in demanding mechanical rooms, this assembly ensures consistent burner ignition and stable flame signals. It is compatible with several Cyclone Xi and Armor series models, utilizing a robust internal diaphragm and solenoid configuration to handle supply pressure fluctuations. For contractors performing a gas valve replacement, this OEM component ensures the system meets original factory manifold pressure specifications, maintaining the unit’s thermal efficiency and preventing nuisance lockouts or combustion instability during high-demand cycles.

• Precise Fuel Regulation: Maintains strict manifold pressure for optimal combustion efficiency and lower emissions.
• Direct OEM Compatibility: Engineered specifically for A.O. Smith Cyclone and Lochinvar Armor platforms to ensure a drop-in fit.
• Enhanced Reliable Ignition: Reduces water heater gas valve failure rates by providing consistent flow to the burner assembly.
• Rugged Internal Seals: Designed to withstand the chemical properties of treated natural gas or propane configurations.

How do I verify if this valve is failing?
Technicians should check for proper DC voltage at the solenoid and use a manometer to verify that the offset pressure matches the rating plate specifications during the trial for ignition.

Is this valve compatible with LP conversion kits?
Yes, this assembly can typically be adjusted or fitted with specific orifices for propane applications, provided you follow the manufacturer’s manifold pressure requirements for the specific BTU input.

Does this assembly include the flange gaskets?
While this is the primary valve body, it is standard practice to inspect and replace all flange O-rings and gaskets during installation to prevent hazardous gas leaks.

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.