Waterflow Devices

Waterflow Switch

Product Overview

These vane-type water-flow detection switches are designed for installation on water-filled pipes in fire sprinkler systems.

Flowing water deflects the vane, activating the output switch.


  • Sealed retard mechanism immune to dust and other contaminants
  • Visual switch activation
  • Field-replaceable retard mechanism and switches
  • Rugged dual form C (changeover, SPDT) switches enclosed in a durable terminal block
  • Accommodates up to 12 AWG wire
  • Suitable for indoor or outdoor use
  • 100 percent synchronization activates both fire alarm control panel and local bell
  • Tamper-resistant cover screws


Product Code Description
WFD20 Waterflow Switch 50 mm
WFD25 Waterflow Switch 65 mm
WFD30 Waterflow Switch 80 mm
WFD40 Waterflow Switch 100 mm