Xylem 69 McDonnell & Miller Low Water Cut-Off Control for Steam Boilers

The McDonnell & Miller Model 69 is a mechanical built-in low water cut-off designed to protect residential and commercial steam boilers from dry firing and water damage. This essential safety control is designed for low-pressure boiler applications of any steam capacity, providing reliable protection when water levels drop below safe operating thresholds.

Key Features:

• 4-1/8" insertion length with 2-1/2" NPT male threaded connection
• No. 11 switch control with automatic reset for dependable low water cut-off and alarm operation
• Maximum pressure rating of 20 PSI
• Multi-voltage operation: 24V, 120V, or 240V power supply
• Packless bellows design with adjustable BX outlet for easy installation
• Dual precision switches for dependable safety operation
• Electrical ratings: 22.2A @ 240VAC, 44.4A @ 120VAC

The float-operated mechanism ensures accurate water level detection and automatic shutdown when levels fall below the safe minimum, preventing costly boiler damage and potential safety hazards. Made in the United States, this control mounts directly into standard 2-1/2" NPT boiler side tappings for straightforward installation in both new and retrofit applications.