Xylem 64 Low Water Cut-Off for Steam and Hot Water Boilers

The Xylem McDonnell & Miller Model 64 is a reliable low water cut-off (LWCO) designed to protect steam and hot water boilers from dangerous low water conditions. This essential safety device automatically shuts down the burner when the water level drops below a safe operating point, preventing costly equipment damage and potential safety hazards.

Key Features:

• 1-inch NPT connections for equalizing lines
• 50 PSI maximum working pressure rating
• Cast construction with clearly marked cut-off line for proper installation
• Suitable for both steam and hot water boiler applications
• Twin switch design allows for dual functionality as main line switch
• Can be used with gauge glass or independent water column installations

The Model 64 installs directly into the boiler system using 1-inch equalizing lines, with the cut-off line on the body casting positioned to ensure protection at the minimum safe water level. This unit is designed for straightforward installation and long-term reliability in residential and commercial boiler systems.