System Sensor WFD25N 2-1/2″ Fire Sprinkler Water Flow Switch – UL/FM, NEMA 4, 450 PSI nhw-180se Standard: ASME B16

Standard: ASME B16

Full port design for unrestricted

Length (A): 6-3/4″

Nominal Size: 6"

Wet fire sprinkler risers on multi-story structures

System Sensor WFD25N 2-1/2″ Fire Sprinkler Water Flow Switch – UL/FM, NEMA 4, 450 PSI nhw-180se Standard: ASME B16WFD25N 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