Wikipedia about common types of valves
Valves vary widely in form and application. Sizes typically range from 0.1 mm to 60 cm. Special valves can have a diameter exceeding 5 meters.
Valve costs range from simple inexpensive disposable valves to specialized valves which cost thousands of US dollars per inch of the diameter of the valve.
Disposable valves may be found in common household items including mini-pump dispensers and aerosol cans.
A common use of the term valve refers to the poppet valves found in the vast majority of modern internal combustion engines such as those in most fossil fuel powered vehicles which are used to control the intake of the fuel-air mixture and allow exhaust gas venting.
Repair of small hydraulic failure
Malfunctions related to the plumbing is a real nightmare for the residents of the building. There are often such failures, which for a long time to hinder the normal functioning and cause many other problems, but some of them are too small and can be quickly repaired. It is important, however, that even the smallest failure to call the appropriate professionals, because even if something on the surface it seems to us trivial, inadequately repaired, can result in a much higher failure and pretty large problems. Repair small defects do not pay much, and good specialist will deal with it quickly and professionally. It is so much simpler, cheaper and better solution than self-repair.
Checked services hydraulic
The hydraulic system is a very important part of any building, so it's good to care for her. If you are a failure, you should immediately call the appropriate service hydraulic, and at the same time it is necessary to remember that he was a proven and reliable. Only those reputable, recommended by many companies are able to provide us with services of the highest quality, which is why it is good to try when selecting specific professionals. Ideally, it was the service, which have used our friends or that is recommended on internet forums. Only such a professional company will be good, if we want our hydraulic system worked flawlessly.