PLUMBING
Waterworks/Municipal Project
These are examples of Water Holding Tanks. Water Holding Tanks
  More Water Holding Tanks
This is an example of Pluming Stations (water, sewage). Pluming Station
This is an example of a plumbing system.

Vistalic plumbing System




Additional Information
Cross Connection Control: http://www.usc.edu/dept/fccchr/intro.html

WaterfurnaceLennox