For technicians managing commercial or municipal water systems

and 220J models

Durable Sealing: Viton (FKM) elastomers withstand fluid temperatures up to 230°F and provide excellent chemical compatibility

000 BTU) valve

Its self-acting design means it requires no external power supply

Lennox 17U20 Pressure Switch 321894-709 For technicians managing commercial orThe Lennox 17U20 Pressure Switch is a high precision sensing component engineered for critical monitoring in residential and commercial HVACR systems. This OEM Lennox 104371 10 replacement part is designed to actuate at 1. 00 inch W. C., providing essential safety interlocking for furnace draft inducer motors and air handling units. Built with a sensitive diaphragm and a robust SPST N. O. contact configuration, it ensures the electrical circuit closes