Wikipedia - plumbing standards and regulations

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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 Źródło: https://en.wikipedia.org/wiki/Plumbing

What you should know before repairs hydraulic

Faults associated with the plumbing happens sometimes all of us.
In many homes, even the newest sometimes burst pipe or other failures occur, which cause great inconvenience or damage to the premises, which is why it is important that in such situations to react quickly and efficiently. We should always, of course, to call a repair specialist, but it is also important that before his arrival accordingly to prepare. It is worth checking exactly what went wrong and to pass this information to the skilled person, but before it with us will, we should also prepare well for the room in which it will work, and for this purpose, remove any unnecessary items. Thanks to this specialist will have enough space to work and quickly repair the failure.

Where do we find valves?

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Valves are found in virtually every industrial process, including water and sewage processing, mining, power generation, processing of oil, gas and petroleum, food manufacturing, chemical and plastic manufacturing and many other fields. People in developed nations use valves in their daily lives, including plumbing valves, such as taps for tap water, gas control valves on cookers, small valves fitted to washing machines and dishwashers, safety devices fitted to hot water systems, and poppet valves in car engines. In nature there are valves, for example one-way valves in veins controlling the blood circulation, and heart valves controlling the flow of blood in the chambers of the heart and maintaining the correct pumping action. Valves may be operated manually, either by a handle, lever, pedal or wheel.

Valves may also be automatic, driven by changes in pressure, temperature, or flow.

These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers. More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator.

An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements.Źródło: https://en.wikipedia.org/wiki/Valve.

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