Description
The Xylem-McDonnell & Miller 310488 Snap Switch Assembly (Model SWA-42S) is a genuine OEM replacement switch assembly designed specifically for use with the McDonnell & Miller 42S Series low-water cutoff controls. Built to the same exacting standards as the original, this snap switch assembly ensures your boiler’s low-water cutoff continues to operate safely and reliably, protecting heating equipment from damage caused by low-water conditions.
Product Overview
The SWA-42S is engineered as a direct-fit replacement for the 42S Series low-water cutoff and pump controller lineup from McDonnell & Miller, a trusted name in hydronic heating and boiler safety controls. Replacing a worn or faulty snap switch assembly restores the precise switching action required for accurate low-water detection and safe boiler operation.
Key Features
- Genuine OEM replacement snap switch assembly for McDonnell & Miller 42S Series controls
- Direct drop-in replacement — no modifications required
- Designed for reliable, repeatable switching action in low-water cutoff applications
- Manufactured to Xylem-McDonnell & Miller quality standards
- Helps restore proper boiler safety control function
- SKU: 310488 | Model: SWA-42S
Compatible Applications
- McDonnell & Miller 42S Series low-water cutoff and pump controllers
- Hot water and steam boiler safety control systems
- Hydronic heating system maintenance and repair
Why Choose Genuine McDonnell & Miller Parts?
Using genuine OEM replacement components like the SWA-42S ensures proper fit, function, and safety compliance. Aftermarket substitutes may not meet the original design tolerances required for dependable boiler protection. Trust Xylem-McDonnell & Miller for critical boiler safety components.
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