Xylem-McDonnell & Miller 150S-M-MD-HD Head Mechanism 150S-M-MD 172810

The Xylem-McDonnell & Miller 150S-M-MD-HD, also known as part #172810, is a replacement head designed for the McDonnell & Miller 150S Series low water cut-off and pump control system. Your boiler system's safe and efficient operation depends on this crucial component. prevents possible overheating and damage by keeping an eye on boiler water pressure and initiating a system shutdown if it drops below a safe minimum level. serves as a safety device by turning off the burner when the boiler water temperature rises above a certain level. permits the system to be manually restarted following a safety shutdown. Give forth visual clues regarding the state of the system, including power and burner operation.