Today plumbing installation is an integral part of home building and plumbers are required to install both plumbing and heating systems within the guidelines of the architect’s plans. This requires directing hot and cold water to kitchens, bathrooms, landscape irrigation and washing machines and providing the drainage to the sewer lines.
There are two main sources of water: municipal pipes and wells. There can be other sources such as rain cisterns but everything flows into the main water intake that is then divided into a hot water feed, which goes through the water heater, and cold water lines. In the case of on-demand water heaters, an individual unit may be placed in every area where hot water is needed: kitchen; bathroom; and clothes washer.