Xylem-McDonnell & Miller 150S-MD Maximum Differential Pump Controller W/Snap Switch 171802

The Xylem-McDonnell & Miller 150S-MD Max. Dif., W/Snap Switch 171802 is a low-water cut-off and pump controller developed for steam boilers with independent water columns. It has a float mechanism to monitor the water level and two snap switches to control the pump and sound an alert in the event of low water circumstances. Furthermore, the Xylem-McDonnell & Miller 150S-MD "Max. Dif." designation denotes that it has a maximum differential feature that minimizes wasteful burner shutdowns caused by pressure fluctuations in low-pressure systems. This ensures that the boiler runs safely and effectively by maintaining adequate water levels and preventing overheating.