In conclusion, let’s talk about the limitations in the application of compression PEX connections. This is a limitation of a recommendatory nature, but above them it is worth considering.
* The use of compression fittings should have a predominantly temporary nature
The fact that in the previous part of the article was an advantage (handmade), has its downside. With prolonged use of polyethylene pipe is inevitable weakening of the compression fittings.
It is important! This happens not only because of the construction of the fitting, but also because of the natural shrinkage of the pipe material (polyethylene) over the years. And the shrinkage is usually faster than 50 years, will be reserved for the technical conditions of low pressure polyethylene.
Remarkably, if the fitting at the time of leak is located in an accessible place – then the problem is temporarily solved by repeated manual fixing the connection. But if the fitting is buried in the ground, you are left with two painful choices: either put up with constant water loss (the loss is enormous) and the fall in pressure in the system, or to begin large-scale excavations to find the ill-fated connection …
So the second, and most important, our recommendation is:
* If you want to make a connection that does not fall into the well and will be under the ground, make a connection welded!
Not to be unfounded, the risk of non-compliance will confirm our recommendation on the example of an object “Repair pipeline PE100 in Naro-Fominsk area. The repairs to the village we visited twice. And believe me, this is not the only such case – we regularly produce such work, and this example was chosen for the Gallery only as a model. Needless to articulate the truth that the repair excavation will cost much more than visit teams welders polyethylene during construction.
Another point finally. On Web sites, vendors compression fittings, often found is the “advantage” as the ease of repair using the same fittings … Hopefully, after reading the article and before making a decision, you do not forget to think about where it will be located repairable connection.
