McDonnell & Miller 93-M Pump Controller 30067439-890 this unit features a 1-inch

this unit features a 1-inch bore

The kit replaces moving parts

Simple Installation: Standard 7/8-inch duct cutout with an integral gasketed flange simplifies mounting on sheet metal ducts

Thermal Security: Integrated auto-reset thermal protection safeguards the motor from overheating due to restricted airflow or capacitor failure

Broad Fluid Range: Rated for a specific gravity range of 0

McDonnell & Miller 93-M Pump Controller 30067439-890 this unit features a 1-inchThe McDonnell & Miller 93 M is a commercial grade combination low water cut off and pump controller designed specifically for steam boiler applications. Engineered for systems with a maximum steam pressure of 150 PSI, this unit features dual snap acting manual reset SPDT switches. These switches provide decisive electrical contact, preventing the rapid cycling or "chattering" often found in mercury free alternatives during turbulent water level