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The McDonnell & Miller model 42S-N, manufactured by Xylem, is a low water cut-off pump controller with snap action mechanism. This is essential for reliable monitoring of water levels in industrial and commercial boilers.
This robust device is designed to enhance the safety and efficiency of boiler operations by preventing dry firing. Its glass connector not only allows for easy monitoring but also adds to the device's durability.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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