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The McDonnell & Miller 63M is a hot water boiler low-water cut-off (LWCO). This model comes with a one-inch inlet and a maximum operating pressure of 50 PSI. Designed and manufactured by McDonnell & Miller, it ensures efficient water level control.
The McDonnell & Miller 63M LWCO is ideal for maintaining safe water levels in hot water boilers. It prevents low-water conditions, ensuring optimal performance and safety of the boiler system.
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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