A plumbing system consists of water supply and distribution pipes, taps, storage tanks, and valves. The Sanitary or drainage system consists of water closets, urinals, solid waste pipes, vent pipes, wash basins, etc. Plumbing, system of pipes and fixtures installed in a building for the distribution and use of potable (drinkable) water and the removal of waterborne wastes. It is usually distinguished from water and sewage systems that serve a group of buildings or a city.