The main idea is:- installation valve on the water tap which allow the water to descent as drops
it opens by container divided into many buttons every button has a specific job like (brushing teeth-ablution-hand washing) and every operation has a specific time
when time is near to end the container give a red light to warn the user he should finish quickly because he use the maximum allowed volume of water for this operation
then the timer close the water for the user
:-press a specific button for the specified operation then press the start button
Valve shape
Engineering drawing for valve
Container and buttons shap
red light when times out
The final form
This video is to explain the idea
