Technology for connecting metal-plastic pipes. Do-it-yourself installation of metal-plastic pipes: connection technology and wiring examples. Prices for materials and services

Today, metal-plastic pipes are increasingly used for pipeline construction. These products compare favorably with analogues presented on the modern market. First, the inner layer is made of densified or cross-linked molecular polyethylene. Secondly, the products have an aluminum layer. Thirdly, metal-plastic pipes are resistant to corrosion and do not require perfect accuracy when calculating linear dimensions.

Features of the system wiring

Installation metal-plastic pipes for DIY water supply it begins with the installation of ball valves, which are located at the junction. Cranes must be of high quality in order to be able to operate at high blood pressure within 60 atmospheres, whereas maximum temperature may be equal to 150 °C. Installation of the water supply system is carried out in a certain sequence: first, a filter is installed, which will provide deep cleaning, and a meter, then a fine filter and a pressure reducer are installed. The installation is completed by installing the collector, from which wiring is carried out to the plumbing fixtures.

Do-it-yourself installation of metal-plastic pipes for water supply is carried out together with filters to protect equipment and pipes from small particles of metals, sand and scale. After all, all this is present in risers in significant quantities. In order to ensure a uniform supply of water, a collector is installed. Typically this node has up to 4 inputs. If the number of consuming devices is greater, then you should select a collector that corresponds to this indicator.

Fittings for metal-plastic

A system of metal-plastic pipes is arranged using fittings, which can be screw or pressing. The former are also called compression fittings, and the latter – press fittings. With the help of the former, the connection is carried out using a certain technology. In this case, the principle of pressure is used, which occurs when the nut is tightened on one open ring.

No special tools are required to make this connection. The connection can be made with two wrenches. One of them will tighten the nut, while the other will resist. If metal-plastic pipes are used for wiring, then they should be laid to the consuming device from the collector with one thread, and unnecessary connections should be excluded.

After a certain time, you may find it necessary to tighten the fittings to make them tight. However, if the pipes are laid in the floor or covered with tiles, then the operation or dismantling will become difficult. In order to eliminate periodic tightening of connections, it is necessary to use press fittings.

Features of connecting pipes using press fittings

Do-it-yourself installation of metal-plastic pipes for water supply can be done using press fittings; they are strong and durable, and the warranty on their operation reaches 50 years. The pressure that these fittings can withstand reaches up to 10 bar, and wiring can be done easily and quickly. The pipes in this case are connected using a press machine, which is a tool for installing pipes and can be manually or microprocessor-controlled hydraulically.

The pipe for connection must be cut with special scissors so that a right angle is formed. Using a reamer and a special calibration tool, the chamfer should be removed and the diameter adjusted for subsequent installation. A sleeve made of stainless steel. The fitting is installed into the fitting pipe until it stops. The sleeve should be grasped with a press clamp, which can be hydraulic or manual. The handles of the press are brought all the way down.

Installation technology

The metal-plastic pipeline is installed in accordance with the technology. Since pipes are sensitive to ultraviolet radiation, thermal damage and mechanical stress, installation must be carried out carefully. Open installation is permissible only in places where there is no influence of the above factors. When laying hidden, the technology provides for the installation of removable shields and hatches for access to compression fittings. Such shields and hatches should not have sharp protrusions.

Do-it-yourself installation of metal-plastic pipes for water supply through building structures is carried out using sleeves. Their internal diameter should be 10 mm maximum greater than the external diameter of the pipe. The gap formed in this case is filled with fireproof soft material, which ensures the movement of the pipes in the longitudinal direction.

There should be no cuts or scratches on the surface of the products during installation of the system. When unpacking the bay, do not use sharp objects. When you mark the pipe, you should use a marker or pencil. Do-it-yourself installation of a water supply system from metal-plastic pipes is carried out using hangers or supports that will allow fastening to vertical surfaces. These additional elements can be purchased together with pipes.

If the fastenings are made of metal, then they are supplemented with soft gaskets. The pipeline will last longer if you ensure it is completely sealed and prevents damage.

Additional installation features using fittings

The most common devices for providing wiring are fittings, which help connect different sections of pipes. They have a variety of forms, which depend on the needs; among other fittings, the following should be highlighted:

coupling;
tee;
square

Before starting work, the metal-plastic pipe is cut into separate sections according to the project. To do this, you should use special pliers that allow you to get an even cut. Some home craftsmen use other devices for this, but experts do not recommend doing this, since the process can damage the inner layer.

At the next stage, the corners and tees are prepared, onto which the seals are put. They are usually made of rubber, but products made from other materials can be found on sale. These rings protect the system from leaks. For further work, you may need calibrators that fold the holes in order to install the fitting and not bend the seal rings.

Plumbers advise checking the pipe walls before starting installation: they should be smooth and clean. It is important to eliminate burrs on cuts and other irregularities. If they are present, then the defects must be removed using sandpaper and wipe the cut alcohol solution, which will degrease the surface.

Do-it-yourself assembly and installation of metal-plastic pipes at the next stage involves installing a fitting into the pipe. A nut and a clamp that matches the diameter are put on it. To do this, the pipe is slightly stretched using a calibrator, and the leg of the assembly is put on its end. It must be pushed inward and secured at the required depth. The connection point must be level.

After installation is complete, you need to check the location of the fitting in the pipe. Now you need to tighten the nut on the metal-plastic pipe. But you shouldn’t put in too much effort, because cracks often appear in communications. The tightening should be strong enough, but do not overtighten the nut. As soon as it starts to crackle, you should understand that it is seated tightly enough on the pipe.

Additional recommendations for the use of press fittings when installing metal-plastic water pipes

If you decide to use press fittings in your work, you should know that they have a number of advantages compared to conventional ones. Firstly, they are ideal for installing and wiring systems, heated towel rails and gas pipelines. Their main advantage is that they do not require periodic repairs, which distinguishes them from their screw counterparts.

Work methodology

If the installation and connection of metal-plastic pipes is carried out using press fittings, then you must cut and clean the products, which is a very important step, because the effectiveness of all subsequent work depends on it. After cutting the pipes using gauges, you need to open the product to the required diameter and chamfer it. A steel sleeve is put on the pipe, and a fitting is located inside.

Using pressing equipment, it is necessary to clamp the sleeve and fitting. This option will be ideal for pressure internal pipelines that do not provide for the possibility of periodic tightening. However, you should be careful, because dismantling the clamp fittings is quite problematic, so it is necessary to think through the plan and methods of branching the system.

How to bend a pipe

The connection and installation of metal-plastic pipes requires changing their rotation. If you do not want to use special devices and want to reduce the number of fittings used, then you can form a turn with a spring, your hands, a pipe bender or using a hair dryer. In order to avoid defects, you can use a spring. It is available for sale in a wide range and is intended to solve the described problem. The technology for installing metal-plastic pipes for water supply with your own hands in this case involves placing the product inside the spring. The size of the latter must be selected taking into account the diameter of the pipe.

Changing the geometry with a hairdryer

One of effective ways is the use construction hair dryer. Under the influence high temperature metal-plastic becomes more pliable. However, it is necessary to act on products in this way carefully, because the plastic can overheat.

If you are a novice craftsman, then first you need to consider how to install metal-plastic pipes for water supply with your own hands. And if you need to bend one of these products, it is better to use a pipe bender. It is suitable for those who do not have experience in carrying out such work. Using this device, you can bend the pipe without much effort and quickly.

Water supply from metal-plastic pipes is the most common option for installing water supply systems in houses and apartments. They have firmly reigned in this market segment. And there are good reasons for this.

On this page we will describe all the pros and cons of such a water supply system, and also describe in detail how to install metal-plastic pipes with your own hands, how to connect them using fittings, etc.

There are several objective indicators that allow metal-plastic pipes to outshine their competitors when installing a water supply system in an apartment or house:

Easy to install. If the work is carried out carefully, it can be performed by anyone without any preparation. In practice, this is a kind of constructor, for the assembly of which you do not need expensive tools and special skills.
Reliability. The 50-year guarantee is proof of this. But note that this applies to pipes, not their connections.
Price. One thing can be said: “Cheaper, but for nothing.” Some competition in this parameter may come from polypropylene pipes, but otherwise they lose.

Based on the above, water supply using metal-plastic pipes is reliable, inexpensive, and you can assemble it yourself. Naturally, connecting to the central system is the prerogative of professionals.

It's unfortunate, but Every barrel of honey has its own fly in the ointment. In the case of metal-plastic water supply, these are fittings.

A fitting is a device with which you can:

change direction;
drown out;
connect;
branch.

In our case we are talking about metal-plastic pipes. If the fitting has the same diameter at both ends, then it is straight; and if different, then transitional.

But these are only their varieties according to their intended purpose, but according to the method of fixation, all fittings are divided into crimp and press fittings.

Compression fittings. Otherwise called ring or serviced. In these, fixation is carried out due to the conical shape, internal surface, crimp nut, which, when tightened, compresses the cutting ring. Such connections can be disassembled and require periodic maintenance. Usually once a year, compression fittings on metal-plastic pipes through which the hot water, you should check and, if necessary, tighten it a little. The reason for their weakening is temperature deformation from hot water. For their installation, two gas (adjustable) wrenches are required.
Press fittings. Or maintenance-free, they are fixed on the pipe by pressing in a special crimp sleeve. The work is carried out using press tongs. They can be manual or electric. The first ones cost from 4 tr., the second ones from 25 tr. The connection turns out to be permanent, but with a guarantee against leaks, regardless of the water temperature. Most often, press fittings are used in connections that will be walled into walls, or with difficult access after repairs.

The reliability and quality of connections depend on the scrupulous execution of instructions. But for the price... Although press fittings are cheaper than crimp fittings, their total cost for installing water supply in an apartment is equal to the cost of metal-plastic pipes.

Planning a water supply system “on paper”

The most important and paramount thing is the water supply layout plan. If you have never done this, then compose it with clean slate it is possible without any particular difficulties, although this undertaking is quite painstaking. But it all starts with the consumer.

It is necessary to designate the places where the taps will be. This is the kitchen and bathroom. With proper construction, they are usually located nearby, which makes organizing a water supply system easier and significantly reduces the cost. IN ideal, if they are located in adjacent rooms, only one pipe will be required, from which branches will go through a tee to different rooms.
The place where water enters the house is indicated. There are only two options: central water supply or a private well (well). Depending on this, you may need additional equipment. In particular, when using water from a well, it is necessary to install a hydraulic accumulator (above the consumer level). From it, water will flow by gravity into the house. This system is preferable because it does not require the pump to be turned on constantly. The hydraulic accumulator does not have to be metal. It can be “poured” from concrete. And already installed in the house:
Filter system (configuration depending on water quality).
Boiler.

Accordingly, what if water enters the house from central system water supply, then only monitoring devices will need to be installed at the entrance to account for consumption.

This circuit diagram. It is unacceptable to make recommendations on a filtration system without knowing the quality of the water. The same applies to the water heating system. Depending on the conditions, the boiler can be electric or gas. Using a liquid or liquid water heater solid fuel not economical and associated with certain difficulties. Especially in the summer.

Required tools and materials

A string unwinds from the taps along the wall. In places of bending or branching, nails are hammered in and the direction changes. Accordingly, two (or three) strings will already go from the tees. Having marked the entire system in this way, it is necessary to draw its location on the wall. You can use chalk or water-based emulsion.

Only after this, the string must be removed and its length measured. Additionally, count the number of fittings and their types.

IMPORTANT: increase the resulting pipe footage by 10%. This is common practice.

Regarding the choice of pipe diameter, there is already an established opinion. For almost all residential buildings and apartments, a metal-plastic pipe ᴓ16 mm is more than enough. It provides a supply of up to 3 m 3 /hour. And most water meters are not designed for higher flow rates. And why more?

Choosing a manufacturer of metal-plastic pipes is perhaps the most difficult task. There are quite often fakes on the market. Buy a pipe from a reputable store or from trusted suppliers. We recommend that you refrain from purchasing metal-plastic pipes from Chinese manufacturers. Negative reviews are too common. The highest quality metal-plastic pipes are produced in Belgium ( Henco), Germany ( Frankische and Sanha).

What tools you will need:

Cutter for metal-plastic pipes (from 250 rubles).
Caliber with countersink (from 200 RUR).
Conductor (from 500 rubles).
Press tongs (from RUR 4,000, but can be rented).
Two gas (or adjustable) wrenches.
Hammer.
Screwdriver.

How to use the tool

The caliber restores the shape of the pipe after cutting, and the countersink removes the chamfer and removes burrs. If the caliber is without a countersink, then its work can be done using fine sandpaper.

The conductor is used to bend a metal-plastic pipe. It can be external and internal. In some cases, using the internal one is more convenient, because it does not slip in your hands. But it is not always possible, because the bend point may be far from the end of the pipe. Therefore, we recommend choosing an external conductor.

Press pliers will be required if you will be using maintenance-free fittings. Based on 16 years of experience, we recommend press fittings. And there is only one reason. Most residents forget about servicing their compression fittings after a year. And this leads to leaks. But the choice is yours.

Consumables you will need: self-tapping screws, fastenings for metal-plastic pipes, FUM tape.

The process of installing metal-plastic pipes

Start installation metal-plastic water pipe necessary from the source to the consumer (to the taps). Unwind a piece of pipe from the roll to the nearest fitting, and cut it with a knife. Calibrate, deburr and chamfer. Then insert the pipe into the fitting until it stops. The press fittings have special holes to control the depth. The edge of the metal-plastic pipe should be visible in them. Then insert the fitting into the pliers and crimp the connection.

Compression fittings are secured using the nuts and rings included in the kit.

Working with press pliers with your own hands is quite simple, since you won’t be able to insert the fitting “crookedly” into it.

All press jaws have replaceable jaws for pipes of different diameters. Don't go wrong when choosing sponges.

The installation process for compression fittings is slightly different. First, a nut is put on the prepared piece of pipe, then a cutting ring, and after that, the pipe is inserted into the body of the fitting itself. Before tightening the nut, we strongly recommend winding with FUM tape. Only two or three turns are required. You need to start from the edge of the thread and wind it while holding the tape taut. After this, moisten the thread with sunflower oil. This technique will protect against leaks!

The nut is first tightened by hand until it stops. And only then, holding the fitting with one gas wrench, tighten the clamping nut with the other. You don't have to pull with all your might, but you do need to apply a little force.

Installation using press jaws

The metal-plastic pipe should be fixed to the wall every meter. Special fasteners are fixed into the surface through a self-tapping screw, and a pipe is inserted into them.

In those places where this is permissible, the pipe can be bent using a jig. To do this, put a conductor on the pipe, bring it to the desired location, and carefully, holding the product with your hands at a distance equidistant from the target location, bend the pipe in the desired plane. Considering that the bending radius of a metal-plastic pipe is equal to its 8 diameters, this approach is not practical everywhere.

Checking and eliminating leaks

After installing the metal-plastic pipes, connect them to the tap using the hoses included in the kit. Then go along all the routes again and visually check the integrity of the assembly.

Pay attention to tees and splitters. Sometimes, being carried away by one branch, the installer forgets about fixing the pipe in another.

Open the taps at the end of the water supply (kitchen and bathroom). And only after that, slowly, in order to avoid possible water hammer, open the water supply valve to the system. It is most convenient to perform this stage with a partner. He must control the water output at the final destination. As soon as the water starts flowing, to flush the pipes, let it drain for 2-3 minutes. Then close the outlet valves, this will increase the pressure in the system, and go along the entire route of laying the pipe. Check all connections. If in doubt, run a paper towel (or toilet paper).Don't confuse condensation with a leak!

We guarantee that if you have completed the work according to our recommendations, then in 99.9% there will be no leaks. If any connection causes you reasonable concern, then tighten it a little.

The assembly of communications from metal-plastic is one of the most simple ways independently install plumbing, heating, and sewerage in the house. The work does not require expensive equipment, special skills, welding work. Installation of metal-plastic pipes is carried out using different types fittings, the choice of which depends on the purpose of the pipeline and the conditions of its installation.

Metal-polymer pipelines are used for the installation of home water supply communications, for installing heated floors, in sewer and drainage systems.

The characteristics and properties of metal-plastic pipes depend on the characteristics of their structure.

The wall of the pipe material is a multilayer “pie” of five layers:

Cross-linked polyethylene is an inner layer that has smooth surface and high resistance to high temperatures. The term “cross-linked” refers to the structural features of polyethylene on molecular level. The organic polymer is subjected to additional action to connect molecules with additional horizontal connections. The firmware connects up to 85% of free molecules, giving polyethylene high density, resistance to mechanical and temperature influences.
Adhesive layer.
A layer of aluminum foil.
Glue.
External, decorative and protective polyethylene layer.

Pay attention! In their structure, metal-plastic pipes resemble reinforced polypropylene pipes. However, this is a pipe material with completely different characteristics, since the polymer layer has a different nature with different physical properties.

Positive properties of metal-polymer pipes:

Durable. With a special connection they can be walled into the wall.
They are plastic, which does not require additional bending fittings.
Corrosion resistant. The metal layer is reliably insulated with polyethylene from harmful influences.
They have a high throughput capacity and do not become “overgrown” with deposits on the inner wall.
They have good thermal conductivity and high noise insulation.
Environmentally friendly.
They are light in weight.
Compatible with all types of pipelines.
Available for self-installation.

In order to install a water supply system, it is not at all necessary to always resort to the expensive services of specialists. The article describes step by step the sequence of installing metal-plastic pipes for water supply with your own hands when renovating a bathroom. Using it, you will do similar work yourself.

Properties of metal-plastic pipes

Metal-plastic pipes are currently widely used for the installation of pipelines for heating and water supply systems. Compared to traditional steel, they have several valuable properties, due to which they are most often used:

metal-plastic pipes do not rust and deposits do not form on their inner surface;
have a long service life, manufacturers guarantee a service life of up to 50 years;
simple and technological installation does not require special qualifications from the performer;
relatively low price of materials and installation costs.

For installation of water supply major renovation the customer chose from several bathrooms alternative options metal-plastic pipes with connections using press fittings.

Preparation for installation

We come up with the configuration of the future water supply system. It was decided that the use of collectors was not practical. This makes the pipeline more expensive, but does not provide any operational advantages. Therefore, it was decided to make pipeline branches to individual water collection points using tees.

After purchasing all necessary fittings, we laid them out on the floor in the order in which they will be connected in the pipeline. This “rehearsal” made it possible to make sure that all fittings were purchased correctly.

For installation of the water supply we have prepared the following tools and auxiliary materials:

Special scissors for cutting metal plastic and a calibrator.
Press pliers for crimping connections.
Adjustable and gas wrenches.
Flax and sealing paste.

Before the installation of the pipeline in the bathroom began, the necessary preparatory work. All the old plumbing was dismantled along with the pipes, the walls were plastered with the preliminary installation of beacons. After the plaster had dried, sufficiently loose grooves for the pipes were cut into the wall.

Installation of water supply

Connecting pipes with press fittings involves two operations:

Use scissors to cut the pipe to the required length. Using a calibrator, we correct the shape of the cut and chamfer simultaneously from the outer and inner surfaces of the pipe.
Insert the pipe into the fitting sleeve until it stops. The end of the pipe should be visible through special inspection holes. Use pliers to crimp the fitting twice.

The photograph shows that as a result of crimping, two annular compressions are formed on the sleeve.

To simplify the work, we first assemble the individual parts of the water pipe. For example, we crimp water sockets for installing a mixer and attach them to a special mounting plate.

We install the prepared pieces of pipeline in their appropriate place and secure them. The mounting strips are attached to the wall using dowels and screws, the pipes are carefully bent and laid into the grooves.

We connect the assembled parts of the water supply system into a single whole on site. The crimping pliers device allows you to rotate the tool handles into a position convenient for work.

We continue to sequentially install all parts of the water supply system and connect it to the hot and cold water. To make it possible to replace water meters and taps in the future, we make the connection of the pipeline to the meters collapsible, using “American” ones.

The entire work of installing the pipeline from metal-plastic pipes took an hour and a half. Upon completion of installation, we put plugs on all water outlets, opened the taps on the risers and left the pipeline with water under pressure for several days. The grooves were not covered to check the connections for leaks. Work on finishing the bathroom continued at this time.

The installed water supply system turned out to be airtight: there were no leaks in any connection. You can fill the grooves with plaster and finish tiling the walls.

Helpful Tips:

The connection on press fittings is non-separable. If there is an error, it cannot be redone. It is useful to have a few spare fittings in case this happens.
You don’t have to buy press jaws; you can rent them.
Metal-plastic pipes must be bent with caution. If the pipe wall becomes damaged during bending, the pipe should be replaced.
To prevent the pipe from experiencing excessive stress under the plaster when heating and cooling from water, it is better not to smear it directly into the plaster: place an electric corrugation on the pipe. For a pipe with a diameter of 16 mm, a 25 mm corrugation is ideal.

We hope the article will be useful to you, and you will be able to install a pipeline from a metal-plastic pipe with a connection using press fittings yourself.

Advantages and disadvantages of metal-plastic water supply

There are several objective indicators that allow metal-plastic pipes to outshine their competitors when installing a water supply system in an apartment or house:

Easy to install. If the work is carried out carefully, it can be performed by anyone without any preparation. In practice, this is something like a construction set, the assembly of which does not require expensive tools or special skills.
Reliability. The 50-year guarantee is proof of this. But note that this applies to pipes, not their connections.
Price. One thing can be said: “Cheaper, but for nothing.” Polypropylene pipes can compete in some way in this parameter, but in other respects they lose.

Based on the above, water supply using metal-plastic pipes is reliable, inexpensive, and you can assemble it yourself. Naturally, connecting to the central system is the prerogative of professionals.

It's unfortunate, but Every barrel of honey has its own fly in the ointment. In the case of metal-plastic water supply, these are fittings.

A fitting is a device with which you can:

In our case we are talking about metal-plastic pipes. If the fitting has the same diameter at both ends, then it is straight; and if different, then transitional.

But these are only their varieties according to their intended purpose, but according to the method of fixation, all fittings are divided into crimp and press fittings.

Compression fittings. Otherwise called ring or serviced. In these, fixation is carried out due to the conical shape, internal surface, crimp nut, which, when tightened, compresses the cutting ring. Such connections can be disassembled and require periodic maintenance. Usually once a year, compression fittings on metal-plastic pipes through which the hot water, you should check and, if necessary, tighten it a little. The reason for their weakening is temperature deformation from hot water. For their installation, two gas (adjustable) wrenches are required.
Press fittings. Or maintenance-free, they are fixed on the pipe by pressing in a special crimp sleeve. The work is carried out using press tongs. They can be manual or electric. The first ones cost from 4 tr., the second ones from 25 tr. The connection turns out to be permanent, but with a guarantee against leaks, regardless of the water temperature. Most often, press fittings are used in connections that will be walled into walls, or with difficult access after repairs.

Planning a water supply system “on paper”

The most important and paramount thing is the water supply layout plan. If you have never done this, then you can create it from scratch without any particular difficulties, although this undertaking is quite painstaking. But it all starts with the consumer.

It is necessary to designate the places where the taps will be. This is the kitchen and bathroom. With proper construction, they are usually located nearby, which makes organizing a water supply system easier and significantly reduces the cost. Ideally, if they are located in adjacent rooms, only one pipe will be required, from which branches will go through a tee to different rooms.
The place where water enters the house is indicated. There are only two options: central water supply or a private well (well). Depending on this, additional equipment may be required. In particular, when using water from a well, it is necessary to install a hydraulic accumulator (above the consumer level). From it, water will flow by gravity into the house. This system is preferable because it does not require the pump to be turned on constantly. The hydraulic accumulator does not have to be metal. It can be “poured” from concrete. And already installed in the house:
Filter system (configuration depending on water quality).
Boiler.

Accordingly, if water enters the house from the central water supply system, then only monitoring devices will need to be installed at the entrance to account for consumption.

This is a schematic diagram. It is unacceptable to make recommendations on a filtration system without knowing the quality of the water. The same applies to the water heating system. Depending on the conditions, the boiler can be electric or gas. Using a liquid or solid fuel water heater is not economical and is associated with certain difficulties. Especially in the summer.

Required tools and materials

Only after this, the string must be removed and its length measured. Additionally, count the number of fittings and their types.

IMPORTANT: increase the resulting pipe footage by 10%. This is common practice.

What tools you will need:

Cutter for metal-plastic pipes (from 250 rubles).
Caliber with countersink (from 200 RUR).
Conductor (from 500 rubles).
Press tongs (from RUR 4,000, but can be rented).
Two gas (or adjustable) wrenches.
Hammer.
Screwdriver.

How to use the tool

Consumables you will need: self-tapping screws, fastenings for metal-plastic pipes, FUM tape.

The process of installing metal-plastic pipes

It is necessary to begin the installation of a metal-plastic water supply from the source to the consumer (to the taps). Unwind a piece of pipe from the roll to the nearest fitting, and cut it with a knife. Calibrate, deburr and chamfer. Then insert the pipe into the fitting until it stops. The press fittings have special holes to control the depth. The edge of the metal-plastic pipe should be visible in them. Then insert the fitting into the pliers and crimp the connection.

Compression fittings are secured using the nuts and rings included in the kit.

Working with press pliers with your own hands is quite simple, since you won’t be able to insert the fitting “crookedly” into it.

All press jaws have replaceable jaws for pipes of different diameters. Don't go wrong when choosing sponges.

Installation using press jaws

The metal-plastic pipe should be fixed to the wall every meter. Special fasteners are fixed into the surface through a self-tapping screw, and a pipe is inserted into them.

Checking and eliminating leaks

After installing the metal-plastic pipes, connect them to the tap using the hoses included in the kit. Then go along all the routes again and visually check the integrity of the assembly.

Pay attention to tees and splitters. Sometimes, being carried away by one branch, the installer forgets about fixing the pipe in another.

We guarantee that if you have completed the work according to our recommendations, then in 99.9% there will be no leaks. If any connection causes you reasonable concern, then tighten it a little.

Do-it-yourself water supply from metal-plastic pipes Video

Detailed instructions for installing metal-plastic pipes and connecting them with fittings. All about how to assemble a water supply system in an apartment or house with your own hands with Video

How to properly install metal-plastic pipes with your own hands

In the life of modern man, an important place is occupied by the transfer of various substances, in particular water, over a distance, using supply systems - pipelines, the most important and extensive part of which are pipes.

Thanks to the wide range of products today, every homeowner has the opportunity to independently assemble plumbing system using products from any suitable material. This article will tell you about the installation of metal-plastic pipes for water supply with your own hands, the characteristics and advantages of such products.

Construction of metal-plastic pipes and their advantages

Products of this type consist of three main layers and two layers, from the inside out:

A layer of molecularly compacted or cross-linked polyethylene.
Adhesive layer between the inner layer and aluminum foil.
Aluminum layer.
A layer of adhesive connecting aluminum and the outer layer of a polymer substance.
Outer plastic layer.

Advantages of products made from this material:

relatively small compared to metal elements, weight, which greatly facilitates all maintenance operations, scheduled or unscheduled repairs, dismantling and installation of metal-plastic pipes;
no threat of corrosion, since the inner and outer layers of the products are made of plastic that does not deteriorate under the influence of water;
thanks to aluminum reinforcement, the linear expansion coefficient is very low;
A consequence of the previous paragraph is the possibility of not maintaining ideal accuracy during calculations and preparation of products for installation.

Among the disadvantages of metal-plastic pipes are the following;

their mechanical strength and resistance to overloads are still less than that of metal elements;
the upper thresholds of operating temperature and pressure are also not so high.

A few words about the layout of the plumbing system

Laying out metal-plastic pipes with your own hands is generally not difficult; The process begins with the installation of ball valves on the riser. At this stage, it is necessary to select fittings especially carefully, giving preference to high-quality products suitable for use at operating pressures of at least 60 atm. and temperatures of about 150°C.

It is clear that since no one can vouch for the quality of Chinese products and they can fail at any moment, it is best to avoid purchasing them, choosing more expensive but reliable options.

This is all the more significant if you consider that it is through ball valves that, in the event of a leak, the system shuts off the flow of water into the apartment.

By selecting good taps and having installed them, you can continue to install water supply from metal-plastic pipes with your own hands.

The following preparatory stages of arranging a water supply system:

Installation of a filter for deep cleaning and a water meter.
Installation of a filter designed for fine cleaning.
Introduction to pressure reducer circuit.
Installation of a collector, from which metal pipes will subsequently be discharged, connected in a variety of ways and subsequently connected to plumbing fixtures.

Despite the fact that the internal surface of cross-linked polyethylene is quite resistant to small abrasive particles, installation of cleaning filters in a system with metal-plastic pipes is necessary: a large amount of sand, metal particles or pieces of scale can damage not only the pipeline, but also the output devices.

The collector must be installed to ensure the same intensity of moisture supply from the common riser to all plumbing elements - sinks, washing machine and toilet.

Typically, the manifold has two to four outlets. If there are more devices in the house that require fluid supply, it is possible to choose collectors with the appropriate number of outlets.

Fittings for metal-plastic products

The most important issue that needs to be clarified home handyman, - how to properly install metal-plastic pipes. Usually, special connecting elements - fittings - are used for this purpose.

They come in two types:

Press fittings (mounted by pressing).
Screw (compression type).

Features of installation with compression fittings

These products are characterized by:

the strength of the connection is ensured by the pressure of the screwed nut on the open ferrule;
no need to look for special tools for connecting pipes: just two are enough wrenches, one of which holds the installation site, and the other tightens the crimp nut;
the need to use as few intermediate connections as possible when laying metal-plastic pipes with your own hands;
the possibility of gradually weakening the strength of the connection, as a result of which it is necessary to tighten the crimp nuts from time to time; Because of this, it is not recommended to lay pipes installed in this way into walls or floors.

You can avoid the last problem by replacing crimping products with press fittings.

Features of installation using press fittings

Such products are more reliable and durable (service life - at least 50 years), can withstand working pressure up to 10 bar and ensures easy pipe installation.

The only drawback is the need to use a special pressing machine, manual or hydraulic with a microprocessor.

Cut a piece of pipe to the required length.
Chamfer the ends and adjust the diameter of the product.
A sleeve made of stainless steel is placed on the end.
Insert the prepared part of the pipe with the fitting until it stops.
Using the grip of the press machine, they take the sleeve and compress it, bringing the handles of the press together.

To ensure a durable connection, the following rules should be followed:

tubes do not tolerate well ultraviolet rays and mechanical damage, so lay them open method is possible only where these factors do not exist (read also: “How metal-plastic pipes are assembled - step by step guide making connections");
when laying hidden, it is necessary to provide access to the fittings by providing various windows and removable panels during installation;
when you need to pass pipes through the structure of a house, choose a sleeve with a diameter that is 5-10 mm larger than the similar external parameter of the pipe. Non-flammable material is inserted into the gap, which, when compressed, promotes the longitudinal movement of the pipe;
when mounting products on walls, use suspensions and supports supplied by the same manufacturer, and insulate the metal parts of the fastenings with soft material;
Damage to the surface of the product must not be allowed.

If you follow these tips, assembling a water supply system will be simple and not particularly expensive.

Installation of metal-plastic pipes: do-it-yourself water supply, how to install it correctly, laying, water supply distribution, installation

Do-it-yourself installation of metal-plastic pipes

When constructing pipelines of any type of water supply, do-it-yourself installation of metal-plastic pipes is now successfully used.

Due to their design, metal-plastic pipes have a number of advantages that distinguish them from other types of similar products.

Assembling a metal-plastic pipeline

Advantages and design of metal-plastic pipes

Structurally, metal-plastic pipes have five layers:

The inner layer of the product is made from cross-linked or molecularly compacted polyethylene;
A layer of glue connecting the aluminum layer and polyethylene;
Aluminum layer;
A layer of glue connecting the aluminum layer and the outer layer of plastic;
Layer of plastic.

Metal-plastic pipes have certain advantages compared to similar products:

Due to the polymer layer, metal-plastic pipes are highly resistant to corrosion.
Thanks to the aluminum layer, the products are elastic and retain their shape, making it possible to install metal-plastic pipes of almost any complexity and configuration.
Perfect accuracy when calculating linear dimensions is not required.

Features of the plumbing system layout

Do-it-yourself installation of metal-plastic pipes begins with the installation of ball valves on the riser. For installation, you must choose only high-quality ball valves, which are capable of operating at high operating pressure (within 60 atmospheres) and temperature within 150 degrees.

Chinese counterfeits must be avoided, since in the water supply system much depends on the quality of the taps.

It is the ball valve that can be used to shut off the water supply to the apartment in a situation where leaks occur.

Ball valves for metal-plastic pipelines

Diagram of a metal-plastic pipeline system

Deep filter and water meter;
Fine filter;
Pressure reducer;
A manifold from which pipes made of metal-plastic are routed and installed directly to the plumbing fixtures.

Metal-plastic pipes are mounted together with filters to protect plumbing fixtures and the pipes themselves from small particles of sand, metals, and scale, which are present in significant quantities in the risers.

Installation of a collector is required to ensure a uniform supply of water to the consuming elements - sink, toilet, washing machine, from the water riser. As a rule, collectors have 2, 3 or 4 outlets. In the case where the number of consuming devices is more than four, select collectors that have the required number of outputs.

Fittings for metal-plastic pipes

If you need to connect metal-plastic pipes, installation and direct connection is carried out using fittings for metal-plastic pipes, which come in the following types:

Connecting pipes using compression fittings

Compression fitting diagram

Making connections using compression fittings:

In the case of using a compression fitting, the connection is obtained due to the pressure generated during the process of tightening the nut on the open crimp ring.
To make a compression connection, special tools for installing metal-plastic pipes are not required.

The connection is made using two wrenches: while the nut is tightened with one, resistance is exerted with the other wrench.

If metal-plastic pipes are used when wiring, installation should be carried out to the consuming device from the collector in one whole “thread”, avoiding unnecessary connections.
After some time, it may be necessary to tighten the connection to maintain the tightness of the compression fittings.

But if you lay pipes that have several fitting connections in the floor or cover them with tiles, then performing this operation or dismantling metal-plastic pipes if such a need arises will become very difficult.

To avoid periodic pulling of fittings, you have no choice but to install metal-plastic pipes using press fittings.

Connecting metal-plastic pipes using press fittings

Press fittings are durable and strong (their warranty is up to 50 years), can withstand pressures of up to 10 bar, and the installation of metal-plastic pipes made with their help is quick and easy.

Metal-plastic pipes connected with press fittings are installed using a special press machine. This tool for installing metal-plastic pipes can be simple manual or microprocessor hydraulic.

Instructions for installing metal-plastic pipes with connections using press fittings:

The pipe is cut with special scissors at a right angle.
Using a reamer and a special calibration tool, the chamfer is removed, and the pipe diameter is adjusted for subsequent installation.
A sleeve made of stainless steel is placed on the end of the pipe.
The fitting is inserted into the fitting pipe until it stops.
The press clamp - manual or hydraulic - grabs the sleeve.
Press the press handles all the way.

Rules for laying a metal-plastic pipeline

A metal-plastic pipeline is laid in accordance with the following rules:

When installing a metal-plastic pipe, you must be extremely careful, since the pipes are very sensitive to impact. ultraviolet radiation, mechanical and thermal damage.

Open laying of such pipes is permissible only in places where there is no influence of these factors.

The technology for installing metal-plastic pipes using hidden installation involves the installation of hatches and removable panels for access to compression-type fittings. Such hatches and shields should not have sharp protrusions.
Installation of pipes through building structures is carried out using sleeves with an internal diameter 5-10 mm larger than the external diameter of the pipe.

The gap that is formed in this case is filled with a soft, fireproof material that can ensure the movement of the pipe in the longitudinal direction.

In the process of installing metal-plastic pipes for water supply or heating, at each stage you need to remember that scratches or cuts on the surface of the pipes are unacceptable.

Example of a domestic plumbing system diagram

When unpacking a coil with a pipe, you should not use sharp objects. When marking the pipe, you must use only a pencil or marker.

Installation of a metal-plastic pipe is carried out using supports or hangers, with the help of which they are attached to the wall.

Supports and hangers are offered by pipe manufacturers. Metal fastenings must be equipped with gaskets made of soft material.

A do-it-yourself metal-plastic pipeline will last longer if the given tips, instructions and recommendations are followed in full.

Do-it-yourself installation of metal-plastic pipes: how to install correctly, what tools are needed

192) Do-it-yourself installation of metal-plastic pipes: tools for installing a water supply system, how to install correctly, assembly instructions, technology

Do-it-yourself installation of metal-plastic pipes: connection technology + wiring examples

Modern materials for arranging intra-house highways have made it possible self-assembly water supply and heating systems. For example, installing metal-plastic pipes with your own hands will allow you to arrange water supply or sewer lines. Working with such elements does not require complex tools or special skills.

Features of metal-plastic products

Metal-plastic (metal-polymer pipes) are composite products for the production of which various types of materials are used. Similar elements have an attractive appearance, good wear resistance, elasticity, strength.

Typically, a pipe consists of five layers. A durable polymer, usually cross-linked polyethylene, is used as a supporting base. It makes the inner surface smooth, protecting it from blockages, and also contributes to the strength of the product.

An adhesive substance is applied to the core, on which the stabilizing pipe is fixed aluminum foil(it also prevents oxygen from entering). The connection is secured by butt or overlap welding.

The fourth layer is also applied with glue, to which the outer covering – polyethylene – is connected. white, providing protection to the product and giving it an aesthetic appearance.

Technical characteristics of pipes D 16-20 mm

Here are the data typical for metal-plastic pipes of common diameters (16 and 20 mm):

The wall thickness is 2 and 2.25 millimeters, respectively; The thickness of the aluminum layer is 0.2 and 0.24 mm.
One running meter weighs 115 and 170 grams and holds a volume of liquid equal to 1.113 and 0.201 liters.
The thermal conductivity coefficient is 0.43 W/m K, the expansion rate of metal-plastic is 0.26x10 4 per 1 degree Celsius, the roughness coefficient is 0.07.
When the material breaks transversely, the strength coefficient is 2880 N.
The strength of the connection between the adhesive layer and the foil is 70 N/10 sq. mm, the strength coefficient of the aluminum welded layer is 57 N/sq. mm.
Metal-plastic pipes can operate even at +95 o C, briefly withstanding temperatures of +110-130 o C.
IN temperature limits from 0 to +25 o C the system operates at pressures up to 25 bar, and at +95 o C it can withstand a pressure of 10 bar.
The tightness and integrity of the metal-plastic pipe is broken under a load of 94 bar (at +20 o C).

With proper installation and compliance with operating rules, products made of metal-polymers can last 50 years or more.

Advantages and disadvantages of metal polymers

Among the advantages similar products can be attributed:

ease of installation: connections of various categories of metal-plastic pipes are carried out quickly and easily;
high heat resistance (water heated to 100°C can be transported);
reasonable price (metal-polymer pipes are cheaper than metal and most plastic analogues);
high strength and ring stiffness;
resistance to corrosion and aggressive environments;
reluctance to form deposits and blockages;
aesthetic appearance;
high throughput;
low thermal conductivity;
sufficient plasticity;
possibility of easy repair;
durability.

The main disadvantage of such products lies in the fact that the metal and plastic from which the pipes are made have different expansion rates. Regular temperature changes of the agent in the pipes can lead to weakening of the fastenings, which causes leaks in the structure.

To avoid this, experts advise, when performing installation, to always provide a certain margin at pipe joints. It will also be useful because metal-plastic systems do not withstand water hammer well.

Areas of application of metal-plastic elements

Pipes made of metal polymers are widely used in the construction of individual houses, in industrial construction and agriculture.

The main areas of their use are:

transportation of liquids, gaseous agents;
laying drainage systems, water pipes, heating;
in structures involving the transfer of compressed air;
supplying heating components to radiators, installing heated floors;
installation of air conditioning circuits;
protection and shielding of wires (primarily power);
construction of irrigation systems.

when organizing central heating systems with the proposed construction of elevator units;
in places with assigned level fire safety"G";
with the expected supply of hot liquid in the pipeline with a working pressure >10 bar;
in rooms where it is planned to place sources of thermal radiation with a surface temperature of over 150 degrees C.

In addition, it is undesirable to use metal-polymer pipes in safety, signal, overflow, expansion circuits and in fire-fighting water supply systems.

Three main methods of pipe routing

Wiring of metal-plastic systems can be carried out different methods, each of which is selected based on the feasibility and possibilities of further access to the system.

Option #1: hidden

In this case, all pipes and connections are hidden deep in the wall under finishing materials. Only fittings and bends for connecting plumbing fixtures are exposed outside.

When using this installation method, the interior design is preserved, in addition, masking communications protects them from accidental damage.

This option has several disadvantages:

Laying channels for pipes requires a complex and labor-intensive gating process. After laying communications, the surface must be restored again.
This method is not suitable for load-bearing walls, where gating is prohibited by regulatory documents.
Quite a high cost associated with additional work.

This method is best used when renovating a bathroom. It is not advisable to install a hidden installation in an already decorated room, since this will require complete dismantling of the wall covering (cladding, plaster).

Option #2: open

If for some reason the pipes cannot be hidden in the wall, they can be laid along its surface. This option is more convenient for visual inspection of joints, which allows, if necessary, to quickly clean the area or replace a component.

Open wiring can be used in rooms that have already been renovated, since the installation will not harm the design of the walls. The advantages of this method include its ease and lower cost of work than when laying internal communications.

Option #3: combined

In this case, the pipes are laid along the surface of the unfinished walls, after which they are covered with boxes or false panels. That's enough the hard way, since it requires a perfect fit into the interior decorative elements, which can also be used as drywall, tiles and other materials.

Wiring diagrams for bathrooms and bathrooms

At plumbing work, carried out in bathrooms and toilets, three layouts of metal-plastic pipes can be used. For private houses, the most rational option is to use a collector.

Efficient collector system

Reliable and practical option, which involves connecting each object to the central pipe through a supply pair. This allows the faucet to regulate or turn off the water supply to each specific plumbing fixture.

All control devices are located in a compact manifold, which is placed in a space specially designated for them (cabinet).

Supply pipes with a minimum of connections do not require special control, which allows for hidden installation. The disadvantage of this option is the rather high cost, since for each connection you will need to purchase a special stopcock. Since such a system is quite complex, work must be done carefully and carefully.

An important advantage: if a separate item (washing machine, faucet) fails, there is no need to completely disconnect the bathroom from the water supply - just turn off the necessary shut-off valve.

Serial connection system

This option involves connecting each plumbing item to the main pipe using a separate tee. It is more suitable for bathrooms with minimum quantity objects ( washing machine, general mixer).

The sequential circuit can be implemented after completion in the room finishing works, applying open system styling The assembly process is quite simple: the pipe is laid from one object to another, and at the same time the supply element is removed from the tee.

This option requires minimal financial costs. It should be taken into account that when large quantities There may not be enough pressure at the fluid intake points, and the system will function with difficulty or even fail completely.

Wiring system with pass-through sockets

The connection of plumbing fixtures is similar to the serial one, but instead of tees, sockets are used. This scheme is usually used only in individual houses, since it requires laying long pipes, as well as installing an additional pump that will help provide the required water pressure.

When performing connecting work with metal-plastic pipes, several important nuances should be taken into account:

When developing a design, it is desirable to provide a minimum of connections.
It is important to use pipe and couplings made from the same material.
It is better to use thermal insulation for the pipeline to prevent condensation from settling.
It is necessary to provide free access to metering devices, filters, and detachable connections.

Compliance with the rules will create reliable system, capable of serving for many years.

Layout of sewer pipes

The work of installing sewer metal-plastic pipes has its own characteristics.

In this case, to ensure smooth drainage of wastewater and prevent blockages, it is important to comply with the following requirements:

Maintain a slope (0.02-0.03 of the entire length of the structure) towards the drain manifold.
It is prohibited to install bends at an angle of 90 degrees when installing structures.
The need to install special tees with removable covers (revisions) in areas before turns that are prone to blockages.
When installing the system in a hidden way, it is important to leave viewing windows opposite the revision.
When assembling a system, it is important to leave a reserve intended for thermal expansion of the product.

For sewer installation, it is necessary to use pipes whose diameter ensures easy passage of wastewater. For toilets, it is recommended to use products with a diameter of at least 100 mm; for bathtubs and sinks, 50-75 mm is sufficient.

Rules for installation of metal-polymer structures

When laying metal-plastic systems, it is important to be guided by the following provisions:

When laying hidden pipelines from this material, it is important to provide removable shields (hatches) that are free of sharp protrusions. They provide access to compression fittings.
It is important to lay systems through building structures using sleeves whose internal diameter is 0.5-1 cm larger than that of the pipe. The gap that forms between the elements must be filled with soft non-flammable material, ensuring the movement of the pipe in the longitudinal direction.
When laying metal-plastic water pipes or heating systems It is important to avoid damage to the surface of the elements, including scratches or cuts. To unpack the bay, it is better to avoid sharp objects and mark the structure with a pencil or marker.
Installation of the structure can be carried out using a support or suspension, which are usually present in the range of manufacturers of metal-polymer pipes. They help to attach products to the wall, while metal parts are installed with spacers made of soft material.

All stages of operations must be carried out carefully and carefully, since metal-plastic elements are sensitive to ultraviolet radiation and mechanical damage. External installation of such structures is appropriate only in places where there are no such factors.

Tools and materials for laying pipes

Laying metal-polymer systems requires a minimum of devices and materials, but it is better to choose high-quality devices and pipes.

Pipeline installation accessories

To create a structure made of metal-plastic, a very modest set of tools is enough: a pipe cutter, a simple pipe bender, an extension wrench and a spanner.

A pipe cutter is needed to separate measured sections of pipe from the coil. Since metal-plastic is a fairly malleable material, it can be cut with a hacksaw or even a sharp knife. However, ideal perpendicularity of the lines, without which it is difficult to obtain a tight connection, can only be achieved by using a special cutter.

Keys different types important for mounting and assembling threaded connections on pipeline fittings. If absolutely necessary, you can get by with one spanner, but for comfortable work it is better to use two spanners and one adjustable wrench.

A gauge is an important tool for creating an accurate and tight connection between a pipe and a fitting: it allows you to center the cut plane and chamfer the inside of the product.

The pipe bender allows you to change the configuration of the element, so you can save on corner fittings. It is especially important to have this tool if the design involves large number corner mates.

What materials will be needed

To lay the pipeline, it is important to stock up on the following components:

pipes (coils, measured sections);
various fitting options (bends, tees, corners), with the help of which individual sections of pipes are transformed into a single system;
fastening elements - dismountable clamps and clips, with the help of which metal-plastic structures are fixed to supporting surfaces, most often on the wall.

It is important to choose everything in advance necessary materials and tools to then carry out all the work smoothly.

Pipe line marking

Before starting work, it is important to think about how the pipes will be placed. When developing a circuit, it is advisable to:

Draw pipeline lines directly on the walls of the room where it is planned to be laid, which helps visualize the structure.
As a starting point, use the connection point of the pipe to the tap or radiator, which must already be installed before installation begins.
Minimize the number of tees and crosses that affect pressure stability, and also minimize the number of other fittings.
For corner laying of metal-plastic pipes, you can use a pipe bender or corner fittings.
All connecting elements should be provided with free access, since threaded fasteners need periodic tightening to avoid leaks.

The installation of connecting elements must be carried out after completion of calculations and marking of the structure.

Overview of fittings for metal-plastic systems

To prepare for work, it is important to cut the pipes into sections of the required length, and all cuts must be made strictly at right angles. If the pipe becomes deformed during the cutting process, it must be leveled with a gauge (it will also help remove the internal chamfer).

Various types of fasteners are used to install the structure; we will dwell on them separately.

Option #1: collet

Push-in fittings, consisting of a body, a ferrule, and a rubber gasket, have a detachable design, so they can be used several times. The thread of the parts allows them to be combined with household appliances.

To connect the connecting elements to the pipe, you need to put a nut and a ring in series. Insert the resulting structure into the fitting and tighten the nut. To make it easier for the pipe to pass into the connecting element, it is advisable to wet it.

Option #2: compression

Widely used for connecting pipes are parts that can be called conditionally detachable. Before installation, it is important to ensure the presence of o-rings and dielectric gaskets, which should be located on the shank of the part.

To connect, a nut and a ferrule are put on the end of the pipe (if it has the shape of a cone, then the process is carried out on the narrower side of the part). After this, the shank is inserted into the pipe (this requires some effort), and in order to seal, the part is covered with tow, flax, and sealant.

The next step is to put the union nut on the fitting body and tighten it. It is convenient to do this with the help of two keys: one of them fixes the part, the other tightens the nut.

This method is quite easy and does not require the use of special equipment, however, it is not advisable to use it for hidden wiring, since it requires checking the connection.

Option #3: push fittings

Convenient connecting elements that do not require special tools for fastening. For installation, it is enough to insert the product into the connecting part, and the end of the pipe should be visible in the inspection window.

Immediately upon completion of installation, thanks to the included water jet, the fitting wedge is pushed forward, forming a clamp that prevents leakage.

This method allows you to quickly and easily create the required structure, ensuring high-quality, durable connections. Almost the only drawback of push fittings is their high cost.

Option #4: press fittings

These elements are used to create permanent connections using press jaws or similar devices.

To connect, you need to calibrate the part by removing the fez from it, after which the sleeve is put on it and the fitting is inserted. The sleeve is grabbed by press jaws, after which the part is firmly clamped by bringing the handle together.

This element can only be used once, but the fasteners mounted with it are quite tight and reliable, making them suitable for hidden wiring.

Installation of pipes from different types of materials

To connect elements, one of which is made of metal and the other of metal-plastic, special fittings are designed, one end of which is equipped with a thread, and the other with a socket.

For installation metal pipe you need to cut it with a thread, wrap it with tow, lubricate it with soap or silicone, and then put on the fitting by hand. After its second end is connected to the plastic element, the thread is completely tightened using a wrench.

Assortment of fittings of different shapes

For ease of installation, the connecting elements can have different shapes. The most common are:

adapters for connecting pipes with different diameters;
tees providing branches from the central pipe;
corners for changing the direction of flow;
water sockets (installation elbows);
crosspieces that allow you to organize different flow directions for 4 pipes.

Press fittings can have a special configuration (couplings, triangles, tees).

Do-it-yourself technology for installing metal-plastic pipes

How to properly install metal-plastic pipes with your own hands. What fittings are used when installing the pipeline. Wiring diagrams and assembly technology