Description
Product Overview
The Xylem-McDonnell & Miller 305200 is a genuine OEM replacement switch designed to restore full functionality to your FS4-3 series flow switch installations. Identified by model number FS4-33, this replacement switch is compatible with all FS4-3 variants except the D Series, making it a precise, drop-in solution for hydronic heating and cooling system maintenance.
Key Features
- Genuine Xylem-McDonnell & Miller replacement switch component
- Model Number: FS4-33
- Compatible with all FS4-3 series flow switches except D Series
- Designed for fast, straightforward field replacement
- Helps restore reliable flow detection and system protection
- Reduces downtime by extending the service life of existing FS4-3 installations
Application
McDonnell & Miller FS4-3 series flow switches are widely used in hydronic heating systems, boiler protection circuits, and commercial HVAC applications to detect water flow and safeguard equipment from dry-run or low-flow conditions. The 305200 replacement switch allows technicians to service the switch mechanism without replacing the entire flow switch assembly, saving time and material costs.
Why Choose Genuine McDonnell & Miller Parts
Using authentic Xylem-McDonnell & Miller replacement components ensures proper fit, reliable operation, and continued system protection. Aftermarket substitutes may not meet the original design tolerances required for dependable flow sensing in critical hydronic and boiler applications.
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