Description
The Xylem-McDonnell & Miller 94-7B-HD 94-7B Head Mech. 166400 is an important component in several low water cut-off and pump controller systems used in hydronic heating equipment. It serves as the engine of the system, monitoring water levels and activating the pump as needed to ensure appropriate boiler performance and prevent overheating due to low water. This head mechanism is compatible with McDonnell & Miller’s Series 94 and 194 controllers. One notable advantage of the 94-7B-HD is its simplicity of replacement. It’s a modular unit that can be swapped without affecting the connecting pipework. Simply undo the bolts on the current float chamber, remove the old head mechanism, and install the new one. This simplifies maintenance and shortens downtime for your heating system.
