Description
Product Overview
The Xylem-McDonnell & Miller 311200 is a genuine OEM replacement float and gasket assembly designed specifically for the McDonnell & Miller 21 Series low-water cutoff controls, model 21-30. This service kit ensures your boiler’s low-water cutoff continues to operate reliably and accurately, protecting heating equipment from dangerous low-water conditions.
Key Features
- Genuine OEM replacement part engineered for the McDonnell & Miller 21 Series low-water cutoff (Model 21-30)
- Includes replacement float and gasket for a complete service repair
- Designed for precise fit and reliable operation within the 21 Series housing
- Restores proper float action to maintain accurate water level sensing
- Gasket ensures a leak-free seal upon reinstallation
- Supports continued protection of steam and hot water boiler systems
Application
- Compatible with McDonnell & Miller 21 Series low-water cutoff controls, specifically Model 21-30
- Suitable for use on residential and light commercial steam and hot water boilers
- Ideal for routine maintenance, service calls, and float replacement due to wear or corrosion
Why Choose OEM Replacement Parts
Using genuine Xylem-McDonnell & Miller replacement components ensures your low-water cutoff performs to its original factory specification. Aftermarket floats may not match the buoyancy or dimensional tolerances required for accurate water level detection, potentially compromising boiler safety. The 311200 kit gives technicians confidence that the repaired control will respond correctly to low-water conditions.
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