Plumbing is used to ensure safe delivery of water. Clean water usage is made possible only through plumbing which is often taken for granted. It brings comfort and beauty to our living as we are able to use it in several functional areas such as kitchens and bathrooms with such an ease without having a thought of what it would have been if there was no supply of clean water for us. Plumbing industry today holds a strong economic importance as it provides job opportunities and livelihood for many. Lack of safe and affordable water supply leads to a number of water-borne diseases and viruses. According to World Health Organization,.
Major Types of Plumbing Systems
Potable Water System
The potable water system brings water into a structure; this water comes from the community water main. There is a valve on the water main itself for each structure that can be used to shut off its water supply. From there, a single pipe brings water into the structure, and it is then distributed to individual fixtures through a network of pipes. A meter keeps track of how much total water enters the structure.
Sanitary Drainage System
The sanitary drainage system removes wastewater from a building. It consists of pipes that take out human waste and fecal matter as well as wastewater from cooking, laundry, etc. The sanitary drainage system is connected to a series of vent pipes that go through the roof vertically; this allows for the venting of gases and for the entire system to operate at atmospheric pressure. The sanitary drainage system ultimately takes wastewater to the community sewer system.
Stormwater Drainage System
The purpose of the stormwater drainage system is to carry rainwater away from a structure. In older structures, rainwater simply drains into the sanitary drainage system, but in buildings that are more modern a separate system of drains carries water into the community storm sewers. Gutters are a part of the stormwater drainage system visible from outside the structure; other components, such as drains and pipes, are below the ground.
major categories of plumbing systems
potable cold and hot tap water supply
plumbing drainage venting
sewage systems and septic systems with or without hot water heat     recycling and graywater recovery and treatment systems
Rainwater, surface, and subsurface water drainage
fuel gas piping
hydronics, i.e. heating and cooling systems utilizing water to transport    thermal energy, as in district heating systems