Instructions
Select "Build Water Systems" from the Utility Tools menu.
Click on "Water Pipes" to begin installing them. Press the "Page Up" button to rotate a pipe counterclockwise; press the "Page Down" button to rotate a pipe clockwise.
Click on the section of the map where you'd like to lay the water pipe to place it. Water pipes have a radius of six game tiles; everything within that radius will be connected to the pipes.