Installation of metal-plastic pipes by own hands

Metal-plastic pipes in our time quite successfully replace the familiar metal. The lack of condensation, ease of maintenance and installation - all this was the reason that people are trying to buy a pipe made of plastic for the arrangement of communications in their households.

Besides, the known flexibility of such products allows reducing the number of connecting units, which is also an undeniable advantage.

Composition of plastic pipe

1. Outer layer of plastic.
2. Average interlayer of aluminum.
3. Internal plastic interlayer.

Actually, the outer and inner layers fulfill the protective role, protecting the middle layer from damages of a mechanical nature, as well as from the harmful effects of the environment( moisture, temperature changes, chemical influences, etc.).

Classification of plastic pipes

Depending on the size of

Metal-plastic pipe is composed of three interlayers and can be of different diameters( 16-32 mm).A metal-plastic pipe with a diameter of 20 mm is widely used. Depending on the technical conditions, the thickness of the pipe wall also varies.

Depending on the manufacturer

The most popular product of this group is a Belgian, Italian or German manufacturer.

Depending on compatibility with

1. fittings Made specifically for assembly using fittings from the same manufacturer.
2. Universal, combined with fittings of different brands and models.

"Pros" of plastic pipes

1. Flexibility.
2. Can be used for installation of various types of communications( water supply and heating networks).
3. Corrosion resistance.
4. Relatively low price.
5. Ease of installation.
6. No need for additional care( regular painting, etc.).

"Minuses" of metal-plastic pipes

1. Short life( about 15 years).
2. Probability of damage to pipes made of metal-plastic in case of freezing of water in them under the influence of low temperatures.
3. The need to revise and tighten the connectors obtained by the compression fitting method every 3 years to avoid leakage.

Existing methods of installing pipes from metal-plastic

1. Method of using a screw( compression or threaded) fitting.
2. Method of applying press fittings.
3. Assembly using crimp sleeves.
4. Assembly with the use of sliding press fittings.

Here it should be noted that the connection with the press fitting, which has given a leak, can not be repaired. It is only necessary to change the fitting to a new one. In the case of crimp clutches, you can try to tighten, twist, etc.

Structure of the

fitting

1. Enclosure. It consists of a thread on one side, and a fitting with a rubber seal ring on the other.
2. Crimp nut.
3. Conical ring.

How the

fittings work When the nut is tightened, the compression ring squeezes the pipe. The pipe, in turn, tightly grips the fitting with a rubber gasket.

How to mount metal-plastic pipes with your own hands

What is needed?

1. Roulette and pencil for marking.
2. Special scissors for cutting pipes( do not try to replace with a knife or conventional scissors, this can damage the protective layer).
3. Calibrator, round file.
4. Fittings Press.
5. Wrench.
6. Hydraulic or mechanical press pliers.
7. Expander for push-fit press fitting.

How to mount?

For beginners, it's better to get acquainted with the video first:

Using the

1. screw fitting Draw the outline of the future placement of pipes and access points with all dimensions.
2. Measure the length of the pipe of the required length.
3. Trim with special scissors.
4. Align the creased edge using a calibrator.
5. Strip the cut from roughness and burrs with a round file.
6. Take the threaded fitting and unscrew it.
7. Remove the nut and the clamp, and put them on the edge of the pipe.
8. Insert the pipe into the union.
9. Properly align and lower the clamp in place.
10. Start to tighten the nut manually.
11. Squeeze it, using a wrench to a specific cod.

Everything's ready! However, it should be noted that such connections must be constantly visible. Ie, if you plan to hide the wiring in the walls, this method is not for you. Here you need a different approach.

With the

1. crimp sleeves. Measure the required length of pipe.
2. Trim and calibrate.
3. Fit the crimp clutch.
4. Sand the cut, removing roughness.
5. Insert the cut into the fitting with the rubber gasket.
6. Squeeze the clutch with ticks until clear rings appear on it.

With the use of

1. sliding press fittings Measure and cut the pipe.
2. Attach the clutch.
3. Sand the edge and treat it with an expander, flare.
4. Put the pipe on the fitting of the fitting.

Now you can move on to the next node!

And a few more subtleties of

• Before use, unwind the tubing and leave it for 24 hours at room temperature if the material is stored below 0 ° C.
• Cut the pipe carefully, so as not to flatten a fairly soft edge. First, slightly cut the pipe, then, turning the scissors, finish the smooth cut.
• At the entrance to the apartment you can expect a surprise in the form of a metal pipe-riser. Here, a special adapter for connecting a metal pipe with a metal-plastic wiring is useful.
• For cornering at 90 °, do not use corner fittings, pipes made of metal-plastic perfectly bend. To avoid excessive bending of the pipe, use a special spring.

• To fix the metal-plastic pipe on the walls, use special clips, selecting them according to the diameter of the pipe.

• For high-quality wiring, first make a marking for the clips on the wall and attach them with a screwdriver and self-tapping screws. And then, with a light movement, insert the tube into the clips.
• When choosing a fitting, pay attention to the cutting condition. Plots with a tapped thread must not exceed 10% of the total thread length. The thread must also not have any burrs.