Wikipedia - plumbing standards and regulations
Much of the plumbing work in populated areas is regulated by government or quasi-government agencies due to the direct impact on the public's health, safety, and welfare. Plumbing installation and repair work on residences and other buildings generally must be done according to plumbing and building codes to protect the inhabitants of the buildings and to ensure safe, quality construction to future buyers. If permits are required for work, plumbing contractors typically secure them from the authorities on behalf of home or building owners.
In the United Kingdom the professional body is the Chartered Institute of Plumbing and Heating Engineering (educational charity status) and it is true that the trade still remains virtually ungoverned; there are no systems in place to monitor or control the activities of unqualified plumbers or those home owners who choose to undertake installation and maintenance works themselves, despite the health and safety issues which arise from such works when they are undertaken incorrectly; see Health Aspects of Plumbing (HAP) published jointly by the World Health Organization (WHO) and the World Plumbing Council (WPC). WPC has subsequently appointed a representative to the World Health Organization to take forward various projects related to Health Aspects of Plumbing.
In the United States, plumbing codes and licensing are generally controlled by state and local governments. At the national level, the Environmental Protection Agency has set guidelines about what constitutes lead-free plumbing fittings and pipes, in order to comply with the Safe Drinking Water Act.
Some widely used Standards in the United States are:
ASME A112.6.3 ? Floor and Trench Drains
ASME A112.6.4 ? Roof, Deck, and Balcony Drains
ASME A112.18.1/CSA B125.1 ? Plumbing Supply Fittings
ASME A112.19.1/CSA B45.2 ? Enameled Cast Iron and Enameled Steel Plumbing Fixtures
ASME A112.19.2/CSA B45.1 ? Ceramic Plumbing Fixtures
Pip existing old pipes in the house
It happens that after some time the use of our water and sewage network we want to expand because of this that We wanted to build a new kitchen or bathroom. On this occasion, employed by our plumbers can evaluate the condition of existing in our home water supply and sewerage. Very often it turns out that it requires the implementation of some repair. Sometimes you need a patency old pipes installed in the house, which has already gathered a lot of hair, soap suds and other substances that inhibit the flow of water. It may also be that Pip such pipes, even using modern methods, does not bring the desired effects and the need to replace old pipes. Expansion of water and sewage networks is toward this very good opportunity.
Emergency plumbing engaged in the repair of hydraulic failure in homes and apartment buildings as well as in all commercial areas. Therefore, this service can order the owners of all buildings in which there has been some serious incidents in which the building is flooded by water or sewer before. Such emergency plumbing provides its services throughout the week, and all the holy church and state throughout the day. It is able to reach a flooded building, even in fifteen minutes. In justified cases it may first send one of its employees, who will assess whether the failure was established in the building actually is very serious.