Description
Lochinvar & A.O. Smith 100187859 — 2.0″ Blocked Outlet Switch
The Lochinvar & A.O. Smith 100187859 is a genuine OEM 2.0″ Blocked Outlet Switch designed to protect water heating equipment by detecting restricted or blocked outlet conditions. When an outlet blockage is sensed, this safety switch interrupts system operation to prevent potential damage, overheating, or hazardous conditions — keeping your equipment and building occupants safe.
As a direct OEM replacement part, this switch is engineered to exact factory specifications for seamless compatibility with applicable Lochinvar and A.O. Smith water heater and boiler models. Choosing a genuine OEM component ensures reliable performance, proper fit, and the peace of mind that comes with manufacturer-backed quality.
Key Features
- Genuine OEM replacement part from Lochinvar & A.O. Smith
- 2.0″ blocked outlet switch for accurate flow/blockage detection
- Designed to interrupt system operation upon detecting a blocked outlet condition
- Engineered to factory specifications for direct-fit replacement
- Supports safe, reliable operation of compatible water heating systems
- Helps prevent equipment damage caused by restricted outlet flow
Application
- Compatible with applicable Lochinvar and A.O. Smith water heaters and boilers
- Ideal for commercial and residential water heating system maintenance and repair
Ordering Information
- SKU: 100187859
- Brand: Lochinvar & A.O. Smith
- Part Type: Blocked Outlet Switch
- Size: 2.0″







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