Description
Lochinvar & A.O. Smith Heat Exchanger Gasket Set — 15-3/4″ Diameter
Keep your heating system operating at peak efficiency with the Lochinvar & A.O. Smith 100288908 Heat Exchanger Gasket Set. Engineered as a genuine OEM replacement component, this gasket set is designed to restore a proper, leak-free seal on heat exchanger assemblies requiring a 15-3/4″ diameter gasket. Proper sealing is critical to maintaining system pressure integrity, maximizing heat transfer efficiency, and preventing costly water or fluid leaks that can lead to equipment damage or downtime.
Key Features
- OEM replacement gasket set for Lochinvar & A.O. Smith heating equipment
- 15-3/4″ diameter — designed for precise, drop-in fitment on compatible heat exchanger assemblies
- Engineered to maintain a reliable, leak-free seal under normal operating temperatures and pressures
- Helps restore full heat transfer efficiency and system performance
- Manufactured to Lochinvar & A.O. Smith quality standards for long-lasting durability
Application
This gasket set is intended for use during scheduled maintenance, service calls, or heat exchanger replacement procedures on compatible Lochinvar and A.O. Smith boiler and water heating systems. Always verify compatibility with your specific equipment model before installation.
Why Choose OEM Parts?
Using genuine OEM gaskets ensures proper fit, correct material composition, and reliable performance — reducing the risk of callbacks and repeat service visits. Genuine Lochinvar & A.O. Smith replacement parts are the trusted choice of professional HVAC and plumbing contractors.







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