World's Best Water solution on hand wash - Foot controlled Hand Wash

A lot of Water wasted for hand wash. Motion sensing taps technology allow saving water and giving high hygiene. But it is costly.

What if water flow in the tap is controlled from the foot?

Can a plumber change existing water tap in wash basin as foot controlled without a support. Any suggestions/comments welcome.

Check prototype for foot controlled Hand Wash athttps://www.youtube.com/watch?v=gXOOO1Rk1IU