Xylem 193-B-1 McDonnell Miller Low Water Cutoff Pump Controller

The Xylem 193-B-1 is a McDonnell & Miller Series 193 combination low water cut-off and pump controller designed for commercial and industrial steam boiler applications. This critical safety control provides continuous protection against dangerous low water conditions while automatically managing feedwater pump operation to maintain proper boiler water levels.

Key Features:

• Combination low water cutoff and pump controller in one unit
• Maintains consistent water level regardless of system pressure
• Maximum operating pressure of 150 PSI (10.5 kg/cm²)
• Magnetic repulsion mechanism eliminates the need for bellows
• Water column with integral tappings for gauge glass installation
• 1-inch NPT connections with alternate tapping configuration
• Suitable for boilers of any steaming capacity
• Includes SPDT snap-acting switches for reliable operation

This float-actuated control is engineered for professional installation on steam boilers where reliable low water protection and automatic pump control are essential. The McDonnell & Miller Series 193 has been a trusted industry standard for boiler safety and water level management in commercial and industrial HVAC applications.