Hydrolevel 550 Low Water Cut-Off

120Vac Low Water Cut-Off with Manual Reset (after 30 seconds), Test Button and Light, and EL1214 Sensing Probe (Part Number 45-550)

550 is the direct replacement for PSE-801-M-120

Hydrolevel 550 Low Water Cut-Off – 120V Electronic Safety Control for Hot Water Boilers

The Hydrolevel 550 Low Water Cut-Off is a reliable, electrically operated safety device designed to protect hot water boilers by preventing burner operation during low water conditions. Featuring a 120 VAC power rating, this unit includes a manual reset (after 30 seconds), test button, indicator light, and the EL1214 sensing probe (Part Number 45-550).

This model is a direct replacement for the Slant/Fin 432-554-000 and is engineered for easy installation, low maintenance, and dependable boiler protection.

Key Features:

• 120 VAC electronic low water cut-off for hot water boilers

• Manual reset with 30-second delay to prevent nuisance shutdowns

• Includes test button and indicator light for easy diagnostics

• Comes with EL1214 sensing probe for accurate water level detection

• Direct replacement for Slant/Fin 432-554-000

• Maximum pressure rating of 160 PSI

• SPDT switch with electrical ratings: 5.8A AFL and 34.8A ALR @ 120VAC

• Burner off delay: 15 seconds; burner on delay: 30 seconds

• Factory tested for reliability and safety compliance

How It Works:
The sensing probe, installed inside the boiler shell or manifold, uses water as a conductor to complete the circuit. When the water level drops below the probe, the circuit opens, triggering the control to de-energize the burner and prevent unsafe operation.

Benefits:

• Ensures safe boiler operation by preventing dry firing

• Low maintenance and easy to install

• Cost-effective solution with long-lasting reliability

Applications:
Ideal for hot water boiler systems requiring a trusted low water cut-off safety device with manual reset functionality.

Maintain boiler safety and efficiency with the trusted Hydrolevel 550 Low Water Cut-Off—a must-have for professional HVAC service and repair.