Electronic Low Water Cutoff for Stream Boilers, 120V

Hydrolevel 45-450 – Electronic Low Water Cutoff for Steam Boiler Safety

The Hydrolevel 45-450 is a solid-state, 120V low water cutoff designed for direct mounting into residential or light commercial steam boilers. It delivers dependable protection against low water conditions by interrupting the burner circuit, reducing the risk of dry-firing and costly equipment damage. With its compact design and integrated features, it supports long-term system integrity and safety.

Purpose-Built for Steam Applications

This model is engineered to meet the requirements of non-cycling steam boiler systems. It provides automatic burner reset after safe water level is restored and includes timed delays to minimize nuisance shutdowns from short-term fluctuations. Its LED indicators give clear visual feedback for system status, helping contractors quickly verify operation and troubleshoot when needed.

Key Features

• Automatic Reset – Restores burner function 30 seconds after probe detects normal water level, requiring no manual intervention.
• Low Water Status LED – Clearly signals when water is below safe operating level, improving service visibility.
• Direct Mount Installation – Designed for quick and secure threading into a ¾" boiler tapping with no additional piping or blowdown valve required.
• Burner Off Delay (15 Seconds) – Helps reduce unnecessary shutdowns from temporary water level drops, improving reliability.
• Rugged Construction – Built for long-term use in demanding mechanical room environments.

Product Specifications

• Model: Hydrolevel 45-450
• Voltage: 120V AC
• Application: Steam boiler primary low water cutoff
• Mounting: Direct probe mount into boiler

Installation Considerations

While the 45-450 is engineered for straightforward installation, it must be handled by a qualified professional to ensure safety and compliance with code requirements. Proper probe location, wiring, and burner interlock setup are critical for correct operation.

Contractor-Focused Performance

The Hydrolevel 45-450 offers a field-tested solution for steam boiler safety. Its simple setup, reliable operation, and diagnostic features make it a go-to control for service contractors performing system upgrades or preventive maintenance. With fewer nuisance trips and solid-state reliability, it’s a smart investment for long-term system protection.

Protect Your Equipment

Low water cutoffs are essential to protecting boiler systems from one of the most common and preventable causes of failure. The Hydrolevel 45-450 delivers the performance, safety, and ease of service that professionals depend on. Choose a control that’s trusted in the field—backed by a manufacturer known for dependable hydronic solutions.