McDonnell & Miller 63-M Low Water Cut Off Refrigerant Operating with a maximum pressure

Operating with a maximum pressure of 150 PSI and a flow capacity of 73 SCFM

Improved Performance: Restores the valve's original "metallic click" and tight sealing to prevent hazardous leaks

Universal Compatibility: Standard 24V wiring integrates seamlessly with most HVAC zone controllers and thermostats

this specific kit includes the essential defrost control sensor/limit switch required for accurate temperature monitoring

McDonnell & Miller 63-M Low Water Cut Off Refrigerant Operating with a maximum pressureThe McDonnell & Miller 63 M (Part Number 143100) is a heavy duty, float operated mechanical low water cut off designed for superior reliability in both hot water and steam boiler applications. Built for contractors who require a dependable safety interface, this unit features a manual reset mechanism and a robust No. 2 dual switch assembly. These switches provide simultaneous low water cut off protection and a dedicated circuit for an electric water