Lochinvar & A.O. Smith 100338931 Gasket

The Lochinvar & A.O. Smith 100338931 Gasket is a genuine OEM replacement part engineered specifically for critical sealing applications in high-efficiency water heaters and boilers. This gasket cork is frequently utilized as a venturi/blower gasket, providing a high-integrity seal between the blower assembly and the gas-air mixing components. Manufactured from heavy-duty, high-grade cork, this component is designed to withstand the thermal cycling and pressure variables typical of commercial and residential combustion systems. Utilizing a direct replacement gasket like the 100338931 ensures that your equipment maintains the precise air-to-fuel ratios required for peak combustion efficiency while effectively preventing the leakage of combustion gases or intake air. This part serves as the current replacement for 100055547 and 197789-000, making it an essential stock item for technicians maintaining A.O. Smith Cyclone models and compatible Lochinvar units. Its natural cork material properties provide excellent compressibility and recovery, ensuring a tight fit on irregular flange surfaces commonly found in seasoned HVACR hardware.

Key Benefits:

• Ensures an airtight seal for the venturi and blower assembly to prevent combustion loss.
• Authentic OEM HVACR part ensures perfect dimensional compatibility and simplifies field installation.
• Composed of high-durability cork material specialized for low-pressure gas-air interface sealing.
• Directly cross-references with legacy part numbers 100055547 and 197789-000 for broad model coverage.
• Optimizes system performance by maintaining the integrity of the unit’s internal pressure sensors and air switches.

Common Questions:

Where is the 100338931 gasket typically installed?
This gasket is primarily installed between the blower motor flange and the venturi assembly or burner plate, depending on the specific water heater or boiler configuration.

Can I use a liquid sealant instead of this cork gasket?
No. In professional HVACR applications, using the specified 100338931 cork gasket is necessary to maintain the exact spacing and seal required by the manufacturer’s combustion specifications.

Does this gasket fit both Lochinvar and A.O. Smith units?
Yes, as these manufacturers share many engineering platforms, this 100338931 gasket is a standard replacement component for multiple brands within their product family.

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.