Having a mains water supply is still considered a luxury to some people in parts of the world We take it for granted each time we open a tap that there is an endless supply of hot and cold running water.  However to some this would be considerd a luzary, especilaly to those that are geographically located outside the route of the mains water supply. Creating a mains supply grid is an in-depth  feat of engineering that most modern cities throughtout the world already have in place. As...