Plumbing code is a code that provides regulations for the design, installation and inspection of building plumbing and sanitary systems. In the U.S., jurisdictions enact their own codes, some of which are based upon model plumbing codes.1 The most widely adopted plumbing code in the United States is the International Plumbing Code published by the International Code Council (ICC). This code is also used as the basis for the plumbing code of some other countries. Another model plumbing code published in the United States is the Uniform Plumbing Code published by IAPMO.
Wikipedia about plumbing systems
The major categories of plumbing systems or subsystems are:
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, like for example the New York City steam system.
Installation of modern sanitation in the bathroom
Installation of modern sanitary facilities, such as a bidet and a paddling pool, and even a shower, you may need to make some changes or additional connection in the home network plumbing. That is why plumbers are trying to choose such piping and branching to the network created by himself, to then easily it could be extended with new connections. As a result, the household will be able to connect new devices themselves, such as a washing machine or dishwasher, and only in the case of more complex devices ask for help from a plumber. By the way, he will be able to review the status of water supply, sewerage and clean it using modern methods and means.