McDonnell & Miller 150S-MD-HD Low Water Cut-Off/Pump Controller Head MechanismMcDonnell & Miller 150S MD HD Low Water Cut Off Pump Controller Head Mechanism delivers reliable control for boilers by quickly detecting low water conditions and coordinating pump operation. This head mechanism serves as both a Low Water Cut Off and a Pump Controller Head for the 150S Series, providing precise monitoring and safe startup, with a robust design that resists wear in hot boiler rooms. Includes Maximum Differential to balance protection

this valve excels in heating and cooling applications

and quiet operation in both residential and commercial settings

built for dependable motor operation in HVAC and general AC motor circuits

Certifications: UL (Canada and US) approved

the A200 carries UL

SPDT output enables flexible wiring for compressors

Auto Recycle for continuous operation

The horizontal drain pan design guides condensate toward the drain

1/2" inlet/outlet with standard fittings

standardized attachment

reliable temperature control for boilers

it fits a wide range of installations and makes procurement simpler for technicians and buyers alike