For all the time he worked as a plumber, he had to turn the water tap under pressure about a dozen times. Several rules have been worked out. How to correctly and quickly screw a tap into a pipe from which water flows under pressure.
When is a pressure valve required to be replaced?
There are times when the central shut-off valve in the well or basement from the distribution networks of the water utility does not work. And to replace it, the shutdown of entire neighborhoods is required. In order not to wait for the employees of the water utility, you can replace the valve on the wiring yourself.
How to prepare for a pressure valve replacement?
1) It is required to prepare a sealing material, flax (winding), in extreme cases FUMku.
2) Take courage and not be scared when a stream of water hits your face, sugar will not melt.
3) It is advisable to have the skill of packing threads. If not, then we train before a responsible event on the threads without pressure.
A prerequisite before replacing a tap!
At the moment, ball valves are widely used. Such shut-off valves greatly facilitate the installation of a valve under pressure, in contrast to valves (on photo old bronze, this is a valve) Before installation on the pipeline, the valve must be open condition. Necessarily! In this position, the tap is easier to turn on, the water pressure passes by.
We change the valve by pressure
We turn off the old tap. At the same time, splashes of water begin to break out from under the thread right into the face. So that this is not possible to cover the joint with plastic (bag).
Water begins to escape and heat the site or room.
We pulled ourselves together and begin to wind the winding, clockwise onto the thread. Importantly, we leave the first loop free. This trick will make it easy to screw the ball valve onto the threads. And such a connection will not affect the tightness.
We bring the ball valve to the thread.
And we start to catch the thread. An open tap does not pull it out of the hands because the ball is open and the pressure passes through the shut-off valves. The first turn of the thread is not filled with pre-winding, which makes it easier to wind the "ball".
Having caught the thread, we turn the tap by hand force until it stops and turn off the tap!
Taking a breath, we twist the "ball" with the keys until it stops.
Conclusion
The tap can be screwed on under water pressure. Nuances - in no case should the method be used in apartments and when hot water comes out of the pipe. The risk of flooding is high.