The plumbing industry is an integral part of any metropolitan area’s infrastructure. It provides natural gas distribution, water distribution, sanitation service and lighting as well as power-washing facilities for hotels and motels. Most homes have at least one faucet or toilet that are controlled by a human standing inside the house. Most homes have two or three pipes that carry cold or hot water. The plumbing are interconnected with each other through the use of pipes, valves, conduits, hoses and other objects.