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The McDonnell & Miller 172812 model 157S-M is a float-operated combination low water cut-off and pump controller suitable for steam boilers. This unit ensures reliable operation with its robust manual reset feature and dual voltage capabilities.
The McDonnell & Miller 172812 offers exceptional control and reliability in a single compact unit featuring a float-operated mechanism for precise operation.
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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