A waterflow switch in a wet pipe sprinkler system is a device that detects the flow of water through the sprinkler piping and sends an alarm signal to the fire alarm control panel (FACP). It is a crucial component for alerting building occupants and the fire department to a fire event. The waterflow switch typically consists of a vane or paddle that is installed inside the sprinkler piping. Under normal conditions, with the sprinkler system pressurized but no water flowing, the vane remains in a resting position. When one or more sprinkler heads activate due to a fire, water begins to flow thro....
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