Whenever the word plumbing is used, the thing that comes to the minds of most people is the toilet system. It is also in this sense that we shall use the term plumbing; but we shall extend it to include the installation of water supply facilities like taps, wash basins, and sinks in the building. It also includes the repair and or replacement of leaking or broken water pipes, as well other drainage/ waste pipes in the building. In addition, plumbing also includes pipe laying which is the digging of trenches for pipes, setting the pipes in the trenches and securing them together with the use of welding, gluing or cementing. Plumbing work in this sense also includes providing drainage systems on roof tops for rain water (storm water), by connecting storm water piping to a tank or drain. In a nutshell, plumbing is the installation, maintenance and repair of water and waste drainage facilities in a building.