Xylem RB-122E GuardDog Electronic Low Water Cut-Off for Hot Water Boilers - 120V

The Xylem RB-122E GuardDog is a conductance-type low water cut-off specially designed to protect residential and commercial hot water boilers from the hazards of low water conditions. This electronic control unit operates on 120 volts and features an automatic reset function, providing reliable protection with convenient operation.

Key Features:

• 20,000 ohms probe sensitivity for accurate water level detection
• Compact design with 3/4" MIP connections and 1-5/8" probe
• Red low water indicating LED and green power indicating LED for easy monitoring
• No blow down required for simplified maintenance
• Fully CSD-1 compliant for safety standards
• Electronic operation makes installation and wiring straightforward

Specifications:

• Maximum water temperature: 250°F
• Maximum pressure: 160 PSI
• Maximum ambient temperature: 120°F (49°C)
• Can interrupt either 24 VAC or 120 VAC burner control safety circuits
• Made in the USA

The RB-122E provides primary low water protection for hot water heating systems, automatically shutting off the burner when low water conditions are detected to prevent costly equipment damage. This probe-type control is suitable for both residential and commercial applications where codes allow.