Description
The Lochinvar & A.O. Smith 100318326 is a genuine OEM water pressure switch designed to provide reliable pressure monitoring and protection for compatible Lochinvar and A.O. Smith water heating and boiler systems. This switch plays a critical role in safeguarding your equipment by detecting water pressure conditions and signaling the system controls to respond appropriately — helping prevent damage from low or abnormal pressure events.
Key Features
- Genuine OEM replacement part for Lochinvar and A.O. Smith systems
- Monitors water pressure to protect heating equipment from unsafe operating conditions
- Designed for direct drop-in replacement to simplify servicing and minimize downtime
- Built to OEM specifications for consistent, dependable performance
- Compatible with select Lochinvar and A.O. Smith water heater and boiler models
Why Choose a Genuine OEM Part?
Using a genuine Lochinvar & A.O. Smith replacement pressure switch ensures your system operates within the manufacturer’s intended parameters. Aftermarket substitutes may not meet the same performance or safety standards, potentially voiding warranties or causing premature equipment failure. The 100318326 is engineered to integrate seamlessly with your existing controls and wiring.
Application
- Designed for use in Lochinvar and A.O. Smith water heating and hydronic boiler systems
- Ideal for commercial and residential HVAC and plumbing service applications
Ordering Information
- SKU: 100318326
- Brand: Lochinvar & A.O. Smith
- Part Type: Water Pressure Switch







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