tapindicator
nounUK /ˈtæpˌɪndɪkeɪtə/
US /ˈtæpˌɪndɪkeɪtər/
A tap indicator is a small light or sign that shows if water is running.
The tap indicator turned green when the water was on.
OTHER MEANINGS
2. A device that shows how much water is flowing from a tap.
The plumber checked the tap indicator to measure the flow.
3. A small screen on a touch device that shows where you tapped.
The tap indicator flashed where her finger touched the screen.
4. A mark on a map that shows a place where you can get water.
The tap indicator on the map showed the nearest drinking fountain.