Installation of metal-plastic. Do-it-yourself installation of metal-plastic pipes: connection technology and wiring examples. Installation occurs in the following sequence

You will need it with your own hands when creating plumbing and heating systems. engineering systems from this material.

Structurally, metal-plastic pipes are a combination of polymers and metal. This is a 5-layer product in which the outer and inner “shells” are made of cross-linked polyethylene, and between them there is a layer of aluminum. Adhesive layers are also provided at the points of contact between the layers.

The main advantages of this design include:

• high corrosion resistance;
• immunity to moisture and aggressive environments;
• simple and quick installation;
• the aluminum layer allows the pipe to take any shape;
• it is possible to use pipes of a wide range of sizes - from 16 to 32 mm;
• versatility, the ability to create a system with any fittings.

Connection diagrams

The question of how to connect metal-plastic pipes can be solved using one of two connection schemes:

1. Sequential, when the entire system is connected in series, from one point of consumption to another.
2. , when each of the consumers provided in the network has its own supply. It is believed that this type of wiring is more convenient and economical.

Important: Whatever system you choose, for each device that consumes water, you must install its own ball valve. This will allow you to shut off the water supply pointwise in the event of a breakdown.

The general connection diagram always starts with taps - high-quality ones, capable of operating with operating pressure up to 60 atm and heating up to +150°C. After them, a water meter is provided, a device fine cleaning, pressure reducer, manifold, and from it water supply pipes are already routed to each of the installed devices. Filters are necessary to capture contaminants - sand, scale, and so on. As for the collectors, they ensure a uniform supply of water to each of the consuming devices.

What tool will you need?

Various connection methods metal-plastic pipes DIY will require several devices:

• Scissors for cutting pipes must be of high quality so that the pipe does not deteriorate during cutting, so that burrs do not occur and the upper protective layer is not damaged polymer layer.
• Calibrator - straightens the “consequences” of the cut when the wall is slightly concave inward, allowing the pipes to be flared.
• Adjustable wrench and open-end wrenches.
• Pliers and drill, tape measure.
• , if they will be used for assembly. They come with a mechanical or hydraulic drive (household and professional, respectively).
• Expander, in case of using sliding fittings.

How metal-plastic pipelines are connected

For water supply, metal-plastic pipes can be installed with your own hands compression or press fittings.

When compression fittings are installed, a nut is screwed onto the open ferrule ring. This creates pressure (two wrenches), thanks to which a strong compression joint is formed. In this case, the metal-plastic water supply system should be installed in one piece so that “extra” connections do not arise. After all compression fittings will need to be tightened regularly to maintain the tightness of the connection.

Features of installation with press fittings

Connecting metal-plastic pipes with press fittings allows you to get permanent connections— they do not need to be regularly tightened, they will serve for about 50 years. In addition, at the junction points it is allowed operating pressure up to 10 atm.

Important: Pipes installed using press fittings can even be filled with concrete.

The connection technology does not involve welding or soldering:

1. First, you should cut the pipe, strictly maintaining an angle of 90 degrees.
2. The edge of the pipe needs to be processed (chamfered). This ensures that the pipe is adjusted to the required diameter.
3. A stainless steel sleeve should be placed on the edge of the pipe, and the shaped part of the fitting should be installed into the pipe until it stops.
4. You need to put a press clamp on the sleeve and connect the handles until they stop.

If during the installation process it becomes necessary to bend the pipe, then the use of corner fittings is not necessary. The material itself is very elastic, but it costs apply springs, preventing pipe pinching.

Do-it-yourself installation of metal-plastic pipes for water supply can be carried out using sliding fittings. To do this, the pipe is prepared for connection in a standard way, after which the coupling is put on. The pre-cleaned edge should be treated with an expander and flared. Then the pipe is put on the fitting, the sleeve is clamped in the press and moved. Slide fitting It works like this: when the coupling is pushed onto the fitting, the pipe is pressed and securely fixed. This type of connection is also permanent.

We attach the clips to the wall with screws. To ensure that the markings are done evenly, we first mark the places for the clips. The pipes are inserted into the bottom very easily. One click and everything is in place.

How to connect metal-plastic pipes with other materials

The connection of metal-plastic pipes with metal components is carried out in the case when a partial replacement of the water supply is carried out or a metal-plastic pipe is connected to an old metal riser. To carry out the connection work, a compression fitting and a calibrator are required.

Before connecting metal-plastic pipes with metal, you need to know that if products of different dimensions are joined, then the thread is selected in accordance with the size of the cast iron (steel) pipe, and the rest (cuff and washer) - according to the dimensions of the metal-plastic pipeline.

Tow is wound onto a metal pipe, after which the fitting is screwed on. The edge of the calibrated pipe is pushed onto the cone, which is already screwed to the metal. Then the nut is tightened with an open-end wrench, very carefully. The washer ensures reliable crimping of the metal-plastic pipe.

Considering the question of how to connect metal-plastic pipes with polypropylene, note that the connection with polypropylene is made by using special threaded fittings. Such a joint is sometimes needed at fastening points near geysers, washing machines.

General rules for laying a metal-plastic pipeline

Should be considered:

• sensitivity of the material to thermal, mechanical loads, as well as ultraviolet radiation - in practice this means that open wiring such pipes can be made only in places where factors of such influence are excluded;
• if the wiring is hidden, then there must be hatches and removable panels for easy access to connecting fittings (if the fittings are screw type);
• if metal-plastic pipes are being laid through building construction, then they are also provided with sleeves so that their internal diameter is larger size metal-plastic pipes by 5-10 mm - then a gap is formed that needs to be filled with soft material;
• When laying, no cracks or scratches should appear on the surface of the pipes - this means that markings should only be done with a soft pencil or marker.

How to repair

Before you begin repairing a metal-plastic pipe, you need to determine the location of the leak, turn off the water supply and dry the pipe, as well as clean it of grease, dust and other contaminants.

Repairs can be carried out using one of the following technologies:

1. Bandage as a temporary repair method. You need to take a rubber pad, apply it to the leak area and secure it.
2. Temporary methods also include flange, into which the rubber gasket is installed.
3. Using sealant You can reliably cover up cracks and leaks, but this composition will also deteriorate over time.
4. Epoxy adhesive- the leak area is coated with it, then a layer of bandage or cotton fabric is applied, after which another layer of glue is applied. The entire area must dry for 11 hours, and then the water supply can be restored.

Most often, repairs are made at the joints, that is, at the fittings. You can simply tighten the junction of the elements, but if the leak does not stop, then the joint will have to be dismantled. Here possible reasons the malfunctions are:

• damage to the rubber sealing rings - such elements are not repaired, but replaced;
• if the pipe has an uneven cut, then it needs to be leveled and recalibrated;
• If the brass body of the fitting bursts, the fitting is completely replaced.

When installing new fittings, you can lubricate the joints with silicone - this provides additional waterproofing.

Metal-plastic pipes - DIY installation video

The video provides instructions for self-installation metal-plastic pipes.

Installing metal-plastic pipes for water supply with your own hands is quite simple if you understand the diagram, the necessary materials and tools, and the features of the technological process.

Advantages of metal-plastic pipelines:

• High performance characteristics– resistance to high temperatures, ductility, absence of corrosion and salt deposits on the internal walls.
• Reliable connection of structures.
• Long service life - at least 10 years.
• No vibrations or increased noise.
• High-quality pipes do not support combustion.
• To install a plumbing system, minimal repair skills are required.
• Resistance to temperature fluctuations.

Flaws:

• At frequent overheating the elasticity of the pipes decreases.
• The need to protect pipes from direct sunlight.
• Plastic has a high expansion coefficient.

Fitting

Pipeline elements intended for:

• connections of individual pipes of both the same and different diameters;
• creating branches from main pipelines and turns;
• connecting plumbing equipment.

Placed on fittings O-rings, which are necessary to increase the tightness of the connection and prevent leaks.

Required materials and tools

Pipe cutter The tool necessary for high-quality pipe cutting.

Calibrator. A device used to level the internal surfaces of pipes. The standard model has 3 diameters - 16, 20 and 26 mm.

After processing the edges with a calibrator, the pipes are sealed onto the fittings.

Countersink. With absence special knife The calibrator uses pipe countersinks, which also allow you to cut chamfers on the edges of the pipe.

Adjustable wrenches. Used to tighten nuts on fittings.

Manual or electric press. Used to compress pipes on crimp fittings.

Attention! Tools can be rented at the construction market.

Installation

Drawing up a pipeline diagram with all control points, fittings and shut-off valves. To simplify installation work The pipeline route can also be drawn on the walls in actual dimensions.

It is necessary to decide on the method of connecting the pipes.

Crimping method

After cutting onto the calibrated pipes, put on the nut and ring and insert into the fitting until it stops. Then use an adjustable wrench to hold the fitting tightly, and with the other, tighten the nut on the pipe until it stops.

For better fit, you cannot use lubricants and petroleum products, because they will not ensure a tight connection.

Advantages:

• completely removable connection;
• ease of installation;
• absence of leaks in cold water supply networks over a long period of operation;
• long service life;
• the ability to quickly replace individual sections of the pipeline.

Crimping

The pipes are cut to the required length using a pipe cutter. Then they are calibrated and chamfers are cut at the edges.

Next, the edge of the pipe must be inserted all the way into the press fitting (there is a special hole to control the length). The pipe placed on the fitting is inserted into a press (electric and manual) and clamped until a tight connection is formed.

The crimping process takes no more than 60 seconds. Plastic clips can be removed (to give the structures a finished look).

Advantages:

• no need for maintenance;
• at correct installation no leaks throughout the entire life of the system;
• Possibility of sewing into walls and under drywall;
• low cost of installation work.

After installing the system, you need to check its functionality - fill the system with water. If there are no leaks, the installation can be considered successful.

If cracks occur in the fitting, it must be replaced. In order to tighten a loose fitting connection, 2 adjustable wrenches, one of which holds the fitting, and the other tightens the nut until it stops.

• When small leaks appear, it is necessary to promptly tighten the nuts on the fittings. At reappearances leaks, it is necessary to inspect and replace the damaged area.
• It is necessary to install coarse (mechanical mesh) and fine filters in the system.
• Pipe benders, presses and other tools can be rented from a hardware store or online store, saving up to 30% of the total budget for water supply installation.
• It is not advisable to use fittings twice due to their low cost and worn out rubber bands. Finding identical gaskets is difficult.
• The crimp connection requires inspection and maintenance at least once a year for cold water pipes.
• Because main clamp polyethylene pipe in the fitting, it occurs at the fitting; after several tightenings, after the leak reoccurs, the entire assembly must be replaced with re-tightening in a new place. Replacement sealing gum(gaskets) in such cases will not have a positive effect.
• There is no need to wet the edges of the pipe when using a calibrator or countersink, because they have enough sharp knives for high-quality bevel cutting.
• It is not recommended to embed connection points (fittings) into walls. After 5-7 years, press fittings may also leak. Free access must be provided.
• Installation work should be carried out carefully; opening the bays is prohibited with a sharp knife.
• The length of the pipeline also includes sections that extend into the fitting; the margin is up to 2%. If the work is being carried out for the first time, it is necessary to take into account the rejected areas in the material consumption.
• For pipes of small diameters (16, 20 mm), it is advisable to use a pipe bender. Application allows you to save money on the purchase of corner fittings. This technique also eliminates leakage in these areas.
• A sufficient number of clips must be used to secure the pipes to the walls. Fastening is done every 70 cm. Clips must be purchased for the selected pipe diameter, because Technically, the pipeline is supposed to snap into the bend of the fastening structure.

Errors during system installation

• Leaks can be caused by unevenly cut pipe edges, so you should always use a pipe cutter for cutting.
• It is not recommended to replace crimp sleeves on fittings for crimp connections, because in this case, the fitting itself deteriorates, rapid depressurization occurs, and the service life of the system is reduced.
• Cheap connecting parts from unknown manufacturers, as a rule, Low quality, replacing them several times is much more expensive than purchasing high-quality fittings.
• Poorly tightened pipes quickly leak.
• System with crimp connections cannot be sewn into the wall, because this type connections required regular maintenance and tightening the nuts.
• If the pipe does not fit completely into the sleeve, there is a possibility of the pipe being torn out of the connection.
• You cannot use a hacksaw to cut pipes, because in this case, unevenness and burrs occur, and the pipe may crack. Knives and other objects should also not be used to cut chamfers; in this case, the pipe hole will be deformed. Which can lead to rapid leakage. For cutting it is necessary to use countersinks and calibrators.

How to choose pipes

To select pipes you need:

• decide on the type of water supply system;
• take into account the temperature maximum of the water that will flow (for hot water supply it is necessary to choose reinforced models);
• compare price and quality of products;
• operating conditions of the pipes and the expected period of use until the next repair.

How to determine the quality of metal-plastic pipes when purchasing

• Visually, the pipes should have no defects - seams, cracks, irregularities. Also, no delaminations should be visible on the pipe cut.
• Aluminum layer in quality products does not exceed 0.6 mm, but not less than 0.3 mm.

conclusions

Correct selection of pipes and working tools is a guarantee high-quality installation DIY plumbing.

Compliance with technology allows us to obtain reliable pipeline connections that can last for several decades.

If you decide to save money when carrying out repair work, then it is better to do everything yourself. For example, it is quite possible to carry out communications using metal-plastic pipes yourself. The main thing is to prepare everything you need and get acquainted with the advice of experts. And then you can start working. This article talks about how to install metal-plastic pipes with your own hands.

Preparation

Before proceeding with installation, you must prepare necessary tool and devices. Everything will depend on the method of connecting the pipes you choose.

There are two main ways to perform docking:

• using compression fittings;
• using press fittings.

The first option is faster and does not require the use special tool. If installation is carried out using press fittings, then it is necessary to purchase or rent a special device - press pliers.

So, if you chose the first fitting option, then you will need the following:

• to cut pipes you need to prepare special scissors or a hacksaw;
• set of wrenches;
• fine-grained sanding paper;
• special tool for giving pipes the correct round shape(sweep or calibration);
• metal-plastic pipes themselves.

If you decide to use press fittings, then you should buy (or rent, cheaper) press pliers for this set. Such a tool can be either automatic or manual.

Connection using the compression method

This method is the most common, although some experts do not praise it. The fact is that compression connecting elements “loose” over time and leaks appear. Therefore, it is necessary to periodically inspect the joints and, if necessary, tighten the nuts.

The instructions for connecting metal-plastic pipes using compression fittings look quite simple. All work is performed in the following sequence:

• first you need to straighten the pipe over a section of ten centimeters in each direction from the joint;
• We mark the place of the cut and perform it using special scissors or a hacksaw. This must be done strictly at a right angle;
• then the ends of the pipe are ground using sandpaper to remove burrs. After this, calibration is carried out using a special tool. This operation is necessary to give the pipes the correct rounded shape;
• Now you need to moisten the flange fitting with water, so it will be easier to put on the pipe. You need to put it on the end so that the pipe evenly touches the fitting. Together with the flange, a compression ring is put on the end;
• then take two keys and use them to tighten the nut. The first revolutions can be done manually. The nut should go easily. If this does not happen, then most likely you have missed the thread. You need to unscrew the nut and try again;
• After this, you need to test the assembled section for leaks.

When connecting metal-plastic pipes using compression fitting, great efforts are not allowed. If you overtighten the nuts, you can damage the fitting, which will lead to leakage and the need to replace the unit.

Note! If the tightness of the connection is insufficient, then you just need to slightly tighten the nut.

We carry out press installation

Joining metal-plastic pipes using press fittings is considered a more reliable and durable connection. However, this method makes the connection inseparable, which may interfere with repairs or reconstruction of the system.

The work process itself looks like this:

• the pipe section is straightened and markings are made;
• pipe is cut;
• the end is processed using sanding paper, a reamer and calibrated;
• then the crimp coupling included in the fitting kit is put on the pipe;
• Next, you need to put an insulating gasket on the fitting fitting. It is necessary to protect the device from electrocorrosion;
• then the fitting is inserted into the pipe and crimped using press pliers. This must be done carefully and carefully so as not to damage the connecting device. Otherwise, you will have to cut the pipe again and carry out all the procedures again.

You can check the correct connection by appearance coupling. Two uniform rings should appear on its surface. If crimping is done incorrectly, it cannot be repeated. It is necessary to cut the pipe and carry out all the work again.

Installation rules

In order for the connections and the entire system to work properly and without leaks, it is necessary to follow some installation recommendations:

• installation work should be carried out at an ambient temperature not lower than +10ºС;
• if during transportation of metal-plastic pipes they were at sub-zero temperatures, then before installation they must be kept in a warm room for at least a day;
• It is advisable to lay metal-plastic pipes in a closed way. If this is not possible, then protection from mechanical stress and ultraviolet radiation must be provided;
• if at repair work welding is planned, it must be completed before the installation of metal-plastic pipes begins;
• The pipe must not be twisted or excessively bent. According to manufacturers' recommendations, the bend radius should not exceed five pipe diameters. The bending itself can be done manually;
• Since the pipes are quite flexible, it is necessary to secure them. Fastening is carried out every half a meter in a horizontal position and every meter in a vertical position. For this, special fastening clips are used;
• If there is a need to lay a pipe through a wall, then you need to use sleeves.

If you follow these recommendations when installing systems using metal-plastic pipes, the communications will last a long time and will not cause you problems.

Video

In this video you will see how metal-plastic pipes are installed using compression fittings.

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:

1. Cross-linked polyethylene - inner layer having smooth surface and high resistance to action high temperature. The term “cross-linked” refers to the structural features of polyethylene at the 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.
2. Adhesive layer.
3. A layer of aluminum foil.
4. Glue.
5. External, decorative and protective polyethylene layer.

Note! In their structure, metal-plastic pipes resemble reinforced polypropylene pipes. However, this is a pipe material with absolutely 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.
• Possess great throughput, do not “overgrow” 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.

Water supply from metal-plastic pipes is the most common option for installing water supply 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:

1. 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.
2. Reliability. The 50-year guarantee is proof of this. But note that this applies to pipes, not their connections.
3. 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're talking about 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.

1. Compression fittings. Otherwise called ring-shaped, or serviced. In such cases, fixation is carried out due to the conical shape, inner surface, a ferrule nut that, when tightened, compresses the trim 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.
2. 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 much difficulty, although this undertaking is quite painstaking. But it all starts with the consumer.

1. 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.
2. The place where water enters the house is indicated. There are only two options: central water supply or private well(well). Depending on this, you may need optional 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:
3. Filter system (configuration depending on water quality).
4. 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 everyone residential buildings and apartments, there is plenty of metal-plastic pipe ᴓ16 mm. 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. Too common negative reviews. 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 maintenance after a year. compression fittings. And this leads to leaks. But the choice is yours.

From Supplies 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 pipe jaws 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 to the right place, 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.