Which component is described as an electric indicator activated by water flow?

• A. Sprinkler Identification.
• B. Occupancy Limitations.
• C. Control Valve.
• D. Waterflow Detector.

Answer: (D)

Waterflow detector is the device that acts as an electric indicator triggered by water moving through the sprinkler piping. When water begins to flow—such as when a sprinkler head releases water or a line is pressurized—the detector senses the movement and sends a signal to the fire alarm or monitoring system, providing rapid notification of discharge. This is different from sprinkler identification (which is simply tagging or identifying sprinklers), occupancy limitations (which relate to egress and occupant load), or the control valve (which regulates water supply and may have separate indicators but is not activated by water flow itself).