Description
The Lochinvar & A.O. Smith 100208107 is an OEM replacement rope gasket designed to seal the access door on compatible Lochinvar and A.O. Smith water heaters and boilers. Maintaining a proper door seal is critical for safe, efficient combustion — a worn or damaged gasket can allow flue gases to escape, reduce thermal efficiency, and create unsafe operating conditions.
Key Features
- OEM replacement part — engineered to factory specifications for a precise, reliable fit
- Rope-style gasket construction provides a durable, compressible seal around the combustion chamber door
- Helps prevent flue gas leakage and maintains proper draft and combustion efficiency
- Restores original sealing performance on worn or damaged door assemblies
- Compatible with select Lochinvar and A.O. Smith water heater and boiler models
Application
- Designed for use on compatible Lochinvar and A.O. Smith water heaters and boilers
- Ideal for routine maintenance, service calls, and combustion-chamber door repairs
Why Replace Your Door Gasket?
Over time, rope gaskets can harden, crack, or compress beyond their serviceable limit, compromising the integrity of the combustion chamber seal. Replacing the gasket with a genuine OEM part ensures the unit operates safely and at peak efficiency, extending equipment life and protecting your investment.







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