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Imagine such a situation. Something's wrong with the tap of cold water, and an urgent need to change the new one. It is not possible to disconnect the riser through utilities. This often happens on weekends. What to do in such a situation? You can certainly wait, and you can do everything with their own hands. Most importantly - sensibly assess the risks and prospects of such an event, as well as be ready to take responsibility, if "everything goes wrong."
Finished with rhetoric warning that for the repair of plumbing, the more "extreme" should only be taken in the presence of skilled hands, understanding the question, and in the presence of at least minimal skills in this area, move on to a description of the replacement technology for ball valve pressure. As you could already guess, the main problem of this adventure is not so much in water as in the pressure under which it will break out. The work will be long and laborious. Change under running tap and engage insulation just will not work.
But you can try to do the following. With the help of an adapter to hook up to the new ball valve piece of garden hose. Its end will be sent to the sink, tub or toilet (which will be closer to their place of work). The idea is to immediately put on edge after removing the old faucet new way that the jet of water went down the drain. Trickle water and continue along the thread, however, at least with the pipe already can will work.
While water flows, take a wire brush and we clean it threads from the old seal. After that, the existing part of the thread we wind Hermon and tow. Now you can tap to wind through and check it for leaks.
Important: It is necessary to prepare the workplace. Put a bucket under the pipe, get hold of a few rags and clean around all the unnecessary and bothersome.
I want more interesting things about the sanitary business? How about in order to understand why in the US no toilet brushes for cleaning and what is dictated.
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A source: https://novate.ru/blogs/161018/48101/