Low Water Cut-Off for Hot Water Boilers

Hydrolevel 45-550 – Manual Reset Low Water Cutoff for Commercial Hot Water Boilers

Designed for high-performance systems, the Hydrolevel 45-550 is a 120V electronic low water cutoff with manual reset, specifically engineered to meet ASME CSD-1 code requirements for commercial hot water boilers. It offers immediate burner shutdown during unsafe low water conditions, helping to prevent costly system failures and ensuring code compliance where manual reset safety is mandated.

Engineered for Code Compliance and System Protection

This model is ideal for commercial installations that demand both performance and accountability. Once the probe detects a loss of water, the 45-550 interrupts burner operation and requires manual reset after water has returned to a safe level, providing an added layer of protection against accidental restart. A built-in test button and status LEDs allow technicians to verify system operation without draining the boiler.

Key Performance Features

• Manual Reset Safety – Prevents burner reactivation until system is manually reset after low water condition clears (30-second safety delay included).
• Immediate Burner Shutdown – Protects against dry-firing by deactivating the burner when water falls below the probe.
• Test Button – Provides a safe and simple method to test the burner circuit without altering water levels.
• LED Status Indicators – Power and low water lights offer quick, clear diagnostics during setup or service.
• Commercial Compatibility – Suitable for integration with a wide range of commercial-grade water boilers.
• CSD-1 Compliant – Fully meets ASME CSD-1 standards required in many jurisdictions for commercial applications.

Specifications

• Model: Hydrolevel 45-550
• Voltage: 120V AC
• Reset Type: Manual
• Application: Commercial hot water boilers
• Compliance: ASME CSD-1

Installation Notes

This control is built for straightforward integration but should be installed by a licensed professional to ensure compliance with local and national code. Proper wiring and probe placement are critical to functionality. Its direct-mount configuration simplifies installation, especially in retrofit scenarios.

Designed for the Demands of the Field

Hydrolevel’s 45-550 is a dependable safety control for commercial service work, boiler replacements, and new installations. Its rugged build and clear diagnostics make it a favorite among contractors seeking a compliant, no-nonsense low water cutoff solution.

Reliable Safety. Proven Performance.

Don’t leave boiler protection to chance—use the Hydrolevel 45-550 to ensure safety shutoff in critical conditions. Trusted by professionals and designed for demanding systems, it delivers long-term peace of mind and meets the most stringent safety codes for commercial hot water boilers.