McDonnell & Miller 94-M Pump Controller R-22 ensuring consistent thermal cycling without

ensuring consistent thermal cycling without the modulation lag found in standard throttling valves

the 42-21268-04 is the recommended current superseding part for those legacy numbers

directly improving furnace motor efficiency and air circulation performance

This hinge is designed for a broad range of Reznor HVAC equipment

Scroll compression design for smooth and reliable operation

McDonnell & Miller 94-M Pump Controller R-22 ensuring consistent thermal cycling withoutThe McDonnell & Miller 94 M is proof of heavy duty reliability for high pressure steam applications, serving as a robust combination low water cut off and pump controller. Designed specifically for steam boilers with a maximum pressure of 250 psi, this unit utilizes manual reset SPDT switches to ensure precise water level management and failsafe protection. The dual snap acting switches prevent rapid cycling, reducing mechanical wear on your pump