System Sensor WFD25N 2-1/2″ Fire Sprinkler Water Flow Switch – UL/FM, NEMA 4, 450 PSI nhw-180se Length (A): 6-3/4″

Length (A): 6-3/4″

Full port design for unrestricted

1 Chloramine filter

High-volume waste discharge points

Trusted in the field

System Sensor WFD25N 2-1/2″ Fire Sprinkler Water Flow Switch – UL/FM, NEMA 4, 450 PSI nhw-180se Length (A): 6-3/4″WFD25N 2 1 2 Fire Sprinkler Water Flow Switch UL FM Listed The System Sensor WFD25N is a 2 1 2 inch vane type water flow switch designed to detect water movement in wet fire sprinkler systems. Its UL Listed, FM Approved, and built for both indoor and outdoor use, thanks to its weatherproof NEMA 4 enclosure. Top Features: For 2 1 2 Schedule 740 steel pipe UL & FM approved for fire sprinkler systems 450 PSI pressure rating ideal for high demand systems