Description
The Xylem-McDonnell & Miller 342200 is a genuine OEM Strainer Assembly and Gasket (Model SA51-9) designed as a direct replacement service part for McDonnell & Miller 51 Series low-water cutoff and pump controller units. Keeping the strainer assembly clean and properly sealed is essential to maintaining accurate water level sensing and reliable boiler protection in residential and commercial hydronic heating systems.
Product Overview
The SA51-9 Strainer Assembly and Gasket provides a complete service kit for the inlet strainer on 51 Series controls. The strainer prevents scale, sediment, and debris from entering the control body, protecting internal components and ensuring consistent, accurate operation. The included gasket ensures a leak-free seal upon reinstallation, making this a convenient all-in-one replacement solution.
Key Features
- Genuine OEM replacement strainer assembly and gasket for McDonnell & Miller 51 Series controls
- Model SA51-9 — designed for precise fit and compatibility with 51 Series low-water cutoffs and pump controllers
- Strainer filters sediment and scale to protect internal control components
- Includes gasket for a secure, leak-free reinstallation
- Supports reliable low-water cutoff performance and boiler protection
- Simplifies routine maintenance and service calls
Compatibility
- Compatible with McDonnell & Miller 51 Series low-water cutoff and pump controller units
- Suitable for use in residential and light commercial hydronic (hot water) boiler systems
Why Replace the Strainer Assembly?
Over time, sediment, rust, and scale accumulate in boiler system water, clogging the strainer on low-water cutoff controls. A blocked or degraded strainer can impair water level sensing, leading to nuisance shutdowns or, more critically, unsafe boiler operation. Replacing the strainer assembly and gasket as part of routine annual maintenance ensures the 51 Series control continues to function as intended, protecting both the boiler and building occupants.
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