while the induced-powered design eliminates the need for an external power supply for the sensor logic

Engineered from heavy-duty steel

Using an OEM replacement part like this one ensures the insertion depth and electrical ratings meet the specific requirements of the equipment

By utilizing advanced HVAC cooling coil technology

serving as the high-capacity successor to the 325-5AL48-1/2

McDonnell & Miller 63-M-HD Head Mechanism R-410A while the induced-powered design eliminatesThe McDonnell & Miller 63 M HD Head Mechanism (Part Number 143200) is a heavy duty replacement head mechanism designed for the Series 63 Low Water Cut Off. Engineered for both hot water and steam boilers, this manual reset mechanical control ensures critical safety by interrupting the electrical circuit to the burner in 15 psi steam or 50 psi water applications. It features a robust float operated design and includes the No. 2 M switch, providing