Description
The Lochinvar & A.O. Smith 100208661 is a direct OEM replacement flow switch designed to protect boilers and hydronic heating systems by confirming adequate water flow before and during burner operation. Featuring a 3″ paddle, this switch is engineered to integrate seamlessly with compatible Lochinvar and A.O. Smith boiler systems, helping prevent dry-fire conditions and safeguarding heat exchanger integrity.
Key Features
- OEM replacement flow switch for Lochinvar and A.O. Smith boiler systems
- 3″ paddle design for reliable flow detection in hydronic piping
- Protects against dry-fire conditions by confirming water flow before burner ignition
- Helps maintain heat exchanger integrity and extends equipment service life
- Direct drop-in replacement for simplified installation and reduced downtime
Application
This flow switch is intended for use in residential and commercial hydronic heating systems utilizing compatible Lochinvar and A.O. Smith boiler equipment. It is a critical safety component that monitors water circulation and signals the control system to allow or interrupt burner operation based on flow status.
Why Choose OEM Parts?
- Guaranteed fit and compatibility with original equipment
- Maintains manufacturer warranty compliance
- Consistent performance and reliability compared to aftermarket alternatives







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