Since it is impossible to weld polypropylene tubes. Basic errors, video table.

  • Dec 24, 2019
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Improper polypropylene soldering, which can drive any master in perpetual debt.

In our time, for the installation of heating systems and water supply systems are often used polypropylene pipes. Easy to install, low cost and excellent performance characteristics - all this characterizes this type of pipe. For the installation of the pipeline only needs: a soldering iron, pipe cutting shears, pipe and fittings, varieties of which are nowadays a huge number.

But although welding polypropylene anything heavy in itself is not, many "masters" make common mistakes that cause disastrous consequences.

Major errors in welding of polypropylene pipes.


1. The most common error It is incorrect when soldering the heating pipe and the fitting. When subcooling weld obtained poor quality, with pores, which of course will lead to leaks. In case of overheating the inner diameter of the pipe strongly zauzhaetsya and the liquid circulation in the system will be further hampered.

As a result, possible poor performance of the heating system and the lack of pressure in the water.

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I have compiled for you a table, which must necessarily follow when soldering pipes.

The parameters of temperature and time
The parameters of temperature and time

2. The second error - a strong zadavlivanie tube to the nozzle on the soldering iron. The internal passage of the pipe zauzhaetsya critical. You have 2 - 5 seconds from the time you got the fitting and the pipe of the hot nozzle.

If you hesitated, and did not have time for this time to connect the pipe to the fitting to the desired length, it is necessary to trim the pipe and the new remodel. In order to be sure that you have pushed the pipe to the desired length before heating makes a mark on the tube. Use the indelible pencil or washable marker.

3. Contamination and moisture welding polypropylene leads to marriage, and leakage is unavoidable in these cases.

If, nevertheless, water flows into the soldering place, you can temporarily close her access to the joint, scoring in the pipe piece of toilet paper or cloth. But do not forget to get their wire or hook after soldering. Otherwise, to avoid problems later will not work)) 🤣

4. You can not turn the tube after you have connected it to the fitting. The pipe must be pushed into the fitting, not screwed.

Check out the video below. It shows how solder polypropylene absolutely impossible.

As soldering polypropylene tubes.


1. You need to prepare a soldering iron, Scissors, all fittings, cut the required length of the pipe. On the pipes to make a mark on the pipes, to which you want to dent their fittings.

Celebrate better indelible pencil or washable marker to the board. In no case do not make it a permanent marker as to wipe sweat it you can not, as such marks are not very well looked after installation.

2. RecheckWhether to pipes and fittings dirt and moisture. Otherwise, carefully wipe.

3. Heat soldering Iron to the required temperature, depending on the pipe diameter, to push the tube and wait for the necessary time table of the guided I published above.

4. After heating the tube and fitting quickly get them out of the nozzles and connected to each other, pushing up to the mark you made before soldering. All the connection you have just 2 - 4 seconds. During this time, you can adjust compound.

5. After connecting the tube to the fittingWait a while, again guided by that table, I posted above.

I hope that my article was useful for you! 👍

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