Good day, dear guests!
Why is there a need to change the pressure shut-off valves?
There are situations when it is impossible to block the flow of water due to lack of release in the pipeline set to a desired portion or no access to such.
Wait for the local Vodokanal will block the water for the prevention of the equipment also is not likely It senses, as it can happen in a month or two, and the need for equipment replacement rolls!
So, let's begin ...
Training
Change vodozapornoy fittings under pressure, in particular a crane - is made at open gates Both taps to the main water flow does not come to a threaded connection. At the time of twisting the old crane and new wrap - is the length of time that the water pressure should be directed to the sewer (Not to pour Below is flat), and therefore, need to bother about advance winding suction hose to both crane.
Fittings are prepared beforehand, if necessary - and assembled into a single structure with a tap, to be installed on site water supply replaceable.
When steel pipes are often used crimp (compression) connection (not threaded) - special couplings.
In this case, the coupling is screwed onto the valve first, and only after this is done the replacement of valves on the assembled structure.
Process
Fig. 1 - Screw water discharge hose. While the old valve is closed carefully threaded ultimate joint compound by a key (Fig. 2).
Open the old tap shutter and as unscrewing, without strong pressure until water oozes, we clean thread screwdriver and / or a knife (Fig. 3).
After stripping the thread remove the old faucet and fast movements cheat a new faucet with the shutter open and also suction hose (Fig. 4,5,6,7,8).
The movement of water already starts to go inside the newly installed construction. Navorachivaya new faucet, subject 3-4 turns to seal the threaded connection, just that portion that is trimmed.
Fig. 9 and 10 illustrates the winding of flax for the last 3-4 thread turns. Fig. 11, 12 - tap delay.
Further, the key cranking the new crane is threaded to the desired position (Fig. 13)
Attention!
- The method is applicable only to cold water!
- If changing faucet, and the riser old (rusty), and at the time of the old crane twisting there is a possibility of damage / spalling Thread or tube, then only one way - to invite the expert having access level valving resource-supplying organization!
The article is not a call to action, and published in the informative purposes. Assess the possibility, let alone produce such work should only be qualified!
This method is a last resort, if there is no other way!
Thanks for attention!
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