Question

why water supply tank is placed high​

Answer 1

The reason is that greater is the height of tank, more will be the pressure of water in the taps of house. this tank for a good supply water,the height of supply tank must always be a few metre higher than the level at which supply of water is to be made.

Answer 2

Answer:

The primary reason is to create more water pressure. ... A tank that has been elevated to an appropriate height can create water pressure similar to that created by a large pump. The ability to create water pressure with gravity alone means that the only fuel expenditure may be on the small pump used to fill the tank.