Honeywell Thermal Solutions FSG L404T1055

The FSG L404T1055 is a SPST Auto Reset Mercury Free Pressuretrol for oil-fired boilers, delivering precise control in the 5-50 PSI range. This mercury-free pressuretrol replaces L404T1022 and offers reliable startup for your oil heating system.

Designed for safe, dependable operation, the unit features a straightforward SPST interface with an auto-reset mechanism that minimizes downtime. Its mercury-free design reduces environmental and handling concerns while maintaining rugged performance in typical residential and commercial oil boiler setups. The L404T1055 is easy to install within standard Honeywell mounting layouts and integrates smoothly with existing control circuits.

Key benefits include reliable pressure switching, lower maintenance, and compatibility with common oil boiler configurations. The device is built to endure everyday boiler cycling, helping maintain steady system pressure and consistent heat delivery.

• Mercury-free pressuretrol for safer, cleaner operation
• SPST auto-reset switch for automatic recovery after pressure changes
• Oil-fired boiler compatibility with a 5–50 PSI range
• Replaces L404T1022 for easy retrofits
• Simple installation within standard Honeywell mounting