Power cuts & unclosed taps : Is there a solution for preventing water leakage?

Power cuts in the metro cities and tier A cities (like Pune) causes emptying of the elevated water tanks during the peak hours. Usually in a hurry, I forget to check all the taps before leaving for work. So when I come back, the house is flooded and this causes difficulties to others also & large amount of water is wasted.

I would like to know if there is any device/equipment which can prevent such waste of water and money.  My idea of such device would be something which will detect that the tap is open and when the water tank is refilled, it should not allow the water to flow out from the tap. I would like to know if there is any such mechanical device.

Do let me know if any such device is available and the details of vendors of the same.

Irshad Danawala
irshaddanawala@gmail.com

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