Connecting the bathtub in the bathroom
The bathroom is the room in which you can use the shower and do daily personal hygiene. All this makes the private bathroom includes a variety of sanitation, which must be properly installed so that they can function efficiently. Therefore, plumbers often involved in connecting the bathroom faucet and shower or bath. Sometimes the bathroom taps are placed on the photocell which makes the plumber must be performed at the time of their work to use various equipments. The sales are also various types of baths, which the installation may be more or less problematic. While carrying out efficient assembly of the shower may require the presence of two employees of the hydraulic system.
Plumbing performed in the course of putting the apartment block
Large companies engaged in hydraulic performance of full-service plumbing. They can be rented during the construction of the house. They also participate in the process of putting up apartment buildings and schools of all sizes. It seems that the least complicated plumbing services are performed in the course of construction of the house, because they are limited to the performance of domestic water supply and sewage, and in the case of apartment blocks need to make a detailed plan of such a network adequate to the number and position of the individual apartments. However, in the case of schools you need to equip the bathroom in the right amount of sinks, where you will be able to wash their hands after using the toilet. In schools, sports can also stand up showers.
Wikipedia about Valves
A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll.
The simplest, and very ancient, valve is simply a freely hinged flap which drops to obstruct fluid (gas or liquid) flow in one direction, but is pushed open by flow in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction. Modern control valves may regulate pressure or flow downstream and operate on sophisticated automation systems.