Polypropylene pipes in a cold water supply system will last 50 years, and in hot water pipelines - at least 25 years. How to connect polypropylene pipes between each other or with metal pipeline? You will find the answer to these questions in our article. Do not forget that when planning to make a replacement water pipes hot or cold supply yourself, you need not only to choose a joining method, but to stock up on the necessary tools.

Connection methods

1. Butt welding.
2. Socket connection.
3. With the use of fittings.

When choosing a connection method, you must remember that welded pipelines cannot be dismantled.

Butt welding

To connect pipes with a diameter of more than 50 mm, the butt welding method is used. In this case, a professional welding machine is used.

How to properly connect polypropylene pipes with a diameter of less than 50 mm? A tool is used - a soldering iron to connect plastic pipes (the so-called “iron”).

Technological process for ironing:

• Preparation of pipes - cutting to size, cleaning the ends, marking the immersion depth using a marker.
• Heating the soldering iron to the soldering temperature – 260-270 o C.
• Pipes and connecting parts are placed on the soldering iron nozzles strictly perpendicularly.
• Time delay for melt.

Warming up parts on a soldering iron

• Elements and pipes are removed from the nozzles and connected to each other with light squeezing, without twisting. It must be taken into account that the size of the seam depends on the compression force. When soldering small-diameter pipes, it is important that the weld bump does not block the internal passage of the pipe. You should also avoid excessive heat, which significantly degrades the quality of the seam.

In order to “catch” the holding time and the compression force, you need to practice on pipe scraps, this will allow you to avoid defects when carrying out basic work.

• Delay time for cooling.

Socket connection

For joining pipes with a diameter of less than 40 mm, socket soldering is used. For connection, a welding machine with special nozzles and a centering device is used.

Stages of work:

• cutting the pipe using special scissors;
• cleaning the ends;
• heating the device to desired temperature;
• welding (the operation must be performed quickly to avoid deformation);
• fixation of elements, eliminating mechanical loads.

The quality of each compound must be checked immediately after cooling.

The socket connection can also be made cold using glue. With this type of connection, it is necessary to perform a preliminary “trying” - checking how the pipe fits into the fitting. If the fit is too loose, the connection will not be sealed, and if it is too tight, the pipe will move the adhesive layer when inserted. During preliminary adjustment, you need to mark the parts to be connected with a single line.

Carrying out the work step by step:

• cut;
• stripping;
• degreasing with a cleaner;
• applying glue (on the outside of the pipe generously, on the inside of the connecting element in a thin layer);
• connection (the pipe is rotated when inserted into the fitting to distribute the glue evenly);
• removing excess glue;
• waiting time for the glue to harden.

Using fittings

Another “cold” joining method is using fittings. The tool is a crimp wrench that comes with the fittings.

Joining plastic and metal pipes

You can connect polypropylene pipes to metal ones using fittings. This type of connection allows you to connect heating devices, water supply equipment, and switch to pipes of other diameters or from other materials.

Types of fittings:

• press fittings;
• crimping;
• push fittings.

When working with pipes with a diameter of more than 40 mm, the threaded connection is placed on the metal part of the pipeline.

Connecting polypropylene pipes to metal pipes using special adapters greatly simplifies the work.

You can connect a metal-plastic pipe to a polypropylene pipe using a compression fitting.

After connecting pipes and fittings, it is necessary to check the pipeline for leaks. Water is supplied to the system and each connection is checked for leaks. If necessary, seal the joints or tighten them threaded connections. In the case of hot water supply, check the system by applying hot water.

With polypropylene, it is important to know that High Quality When carrying out such work, it can only be achieved when the thickness of the walls of the products is taken into account. Modern technologies make it possible to create quite durable and reliable communications from such pipes. They are not subject to corrosion processes, which is why they are so widespread. Such manipulations can be carried out in one of several ways, but the work can be classified into two categories:

• soldering method;
• use of fittings.

Connection methods

If you decide to find out how to connect a polypropylene pipe to a polypropylene pipe, you need to understand the methods. For example, thin-walled pipes can be connected with threads. If you need to arrange a supply system cold water, the ambient temperature in which does not exceed +20 °C, then products marked PN 10 should be used. The same applies to installation work heated floors, in which the temperature does not exceed +45 °C.

If it is necessary to arrange a cold water supply system, which will be transported when high blood pressure, pipes marked PN 16 should be used. This recommendation is relevant for pipelines with low blood pressure. Most quality option The connection is welding, it can be used for PN 20 pipes, which can withstand temperatures up to +80 °C. Their walls are thicker compared to the previous ones.

The same connection method is also suitable for PN 25 - pipes reinforced with aluminum foil, which are intended for systems central heating and hot water. Pipes with this marking will be able to withstand temperatures up to +95 °C. The connections may be permanent when welding is used; and also detachable, in this case a thread is used.

Threaded connection

Before connecting a polypropylene pipe to a polypropylene pipe, you need to figure out which method is best to use. For example, for a threaded connection you need to prepare fittings with threads, because cut the threads into polypropylene products it is forbidden. The connection is made using a special tape, which will make the joint strong and reliable.

Fittings used

If you decide to use a threaded connection, you will need:

• solder couplings;
• triple square;
• combined crosspieces;
• couplings;
• 90° squares;
• combined angles;
• ball valves;
• solder angles at 45°;
• plugs;
• adapter with external thread;
• water socket;
• fittings made of polypropylene with factory threads.

Welded joint

If you are thinking about how to connect a polypropylene pipe to a polypropylene pipe, you can use the welding method. However, it is important to note that the connection will be permanent. When melting, the molecules of one part move to another, diffusion occurs. When heated by an electric welding machine, the parts are organically connected to each other, because they have the same chemical composition.

To carry out the work you should prepare:

• soldering iron;
• welding machine;
• polypropylene fittings and pipes;

In addition to the listed tools and materials, you should prepare a hacksaw or metal scissors, a tape measure, couplings such as taps, corners and pipes. It is important to stock up on fum tape. As for the welding apparatus, it will consist of heating element and welding nozzles, the diameter of which varies from 16 to 40 mm.

As soon as the indicator goes out, you can begin work, because this will be a signal that the desired temperature of 260 °C has been reached. This will take approximately 15 minutes. If noted subzero temperature environment, then welding work must be abandoned. If it is necessary to weld pipes with a diameter of 60 mm, you should use the socket welding method. Suitable for larger diameters butt welding, which does not involve the use of additional parts.

For pipes whose diameter varies from 16 to 50 millimeters, a hand soldering iron should be used. More impressive diameters will be joined using a mechanical welding machine. The ends of the pipes should be well heated with removable sleeves, then all that remains is to press the elements together, applying little force. This effect should last for several seconds.

Electrofusion welding acts as a more good option compared to the previous method, because the process is controlled by the program. The quality of the joint will be higher, and there will be no need for fixation. Devices with electrodes are used to supply voltage to the heater inside the coupling.

Before connecting two polypropylene pipes using the socket method, it is necessary to cut the products at right angles.

Next, the master should apply a mark to the depth of the socket, to which 2 mm should be added. The connection of products begins with heating using a special device. Afterwards the parts are connected to each other. And if polypropylene has an aluminum layer, then the connection can be made through perforated holes. This allows you to significantly increase the strength of pipes marked PN 25.

Using butt welding

Before connecting polypropylene pipes to each other, you should think about which method is best to use. Butt welding may be suitable, which will allow pipes to be connected together for external sewerage. This approach is relevant if the pipe wall thickness exceeds 4 mm.

At the first stage, the welding points should be trimmed to parallelism. Afterwards you need to heat it up and ensure accuracy with a centering device. Welding must be accompanied by ventilation of the room, because polypropylene emits carbon dioxide and water vapor, as well as smoke.

Solderless connection

Quite often, novice home craftsmen wonder how to connect polypropylene pipes without soldering. For this purpose, fittings made of the same material as the pipes are usually used. If the heating system contains fiberglass-reinforced lines, then other types of products will not be suitable.

You should stock up on polypropylene fittings, which are reinforced with fiberglass. An exception is the case when there is a need to combine polypropylene with another material. In this case, threaded elements are used, for example “American”. Before connecting polypropylene pipes without a soldering iron, you should ask what fittings can be found on sale for arranging water supply and heating systems, among them:

• Y-shaped;
• straight;
• T-shaped.

It is necessary to use these elements, taking into account the method of application and position. Depending on the type of connection, there are several types of shaped products, namely:

• compression (crimp);
• welded

Polypropylene compression fittings are supplied in finished form, there is no need to collect them additionally. Compression fittings have advantages over welded ones. They are:

• ease and simplicity of installation;
• no need to use welding equipment;
• installation options polypropylene fittings in any weather conditions, because they are not afraid of negative temperatures;
• no need for the technician to have special installation skills compression fittings.

If you are thinking about the question of how to connect polypropylene pipes at home using fittings, then you should familiarize yourself with the technology. At the first stage, they prepare Building tools, namely:

• gas and adjustable wrenches;
• screwdrivers;
• open-end wrenches;
• sealant;
• special scissors;
• pipe cutter;
• chamfer;
• caliber.

You may want to think about the placement of the pipes, which may be in or on top of the wall. There should be no hard corners in the diagram. The flexibility of products is achieved using a hair dryer. If you decide to use polypropylene pipes for heating, you should know how to connect them.

The connection point must be sealed in any way convenient for you. This can be done using fum tape. Then the system is assembled according to the design principle; at the corners and in places where the flow is distributed into several parts, special elements such as corners and tees should be used.

Conclusion

Now you know how to connect polypropylene pipes with fittings. However, as practice shows, the welding method is more reliable, because diffusion occurs during the process, which ensures the reliability and strength of the system.

The most often used for this is the so-called cold welding. This technology involves the use adhesive composition special purpose and fittings.

Advantages of using pipe connections without hot soldering

If you are thinking about how to connect a polypropylene pipe to a polypropylene pipe, then you can use a method that involves the use of special fittings. This technique has many advantages, among them especially the increased efficiency of installation of drainage and water supply systems, and the reduction of the possibility of leaks that can occur during butt welding or during a chemical connection. Among other things, the described technology is less labor-intensive and also requires less energy consumption. Among other things, it is associated with lower material consumption. they are quite cheap. Using fittings and glue, you can connect pipes of various diameters, which range from 6 to 400 millimeters.

Comparison of cold soldering with mechanical and welded joints

Before connecting a polypropylene pipe to a polypropylene pipe, you should consider all the advantages of the cold soldering method. Thus, this technique, with low material consumption, speed and quality of work performed, is not inferior to traditional welding. Similar technology gluing does not require the use of special equipment, which greatly simplifies manipulations. You don’t have to use a special machine designed for welding, which consumes quite an impressive amount of electricity during operation. Due to this, it is possible to reduce costs installation work. If you are faced with the task of how to connect a polypropylene pipe to a polypropylene pipe, then it is worth comparing the mechanical mating of elements using fittings. The latter technology is not so energy-intensive, but more material-intensive. This is due to the need to purchase additional fittings, which increases the cost of work.

Features of connection using fittings and glue

If you do not know how to connect a polypropylene pipe to a polypropylene pipe, then it is important to familiarize yourself with the technology. To do this, you will need to use glue, which is intended for connecting pipes to parts such as fittings. The latter are most often made from chlorinated polyvinyl chloride. After application, the glue begins to dissolve the surfaces of the parts by 1/3 of the thickness. This makes it possible to implement diffusion cold welding. On this process affected by air temperature and humidity. Before connecting polypropylene pipes using cold welding and fittings, you must make sure that the ambient temperature is between 5 and 35 degrees. If there is a need to carry out installation work at temperatures below zero, then you should purchase frost-resistant glue, which can be applied until the thermometer drops to -18 degrees. If the work is carried out in hot weather, then gluing must be done in a much shorter time, which will eliminate the possibility of the composition drying out before the manipulations are completed. Before connecting polypropylene pipes using the described technology, you need to make sure that the glue has a uniform consistency, sufficient fluidity and does not have foreign inclusions.

During breaks between work, the container with the adhesive composition must be closed as tightly as possible, which will prevent the evaporation of volatile active components.

Technology for connecting pipes using fittings and glue

If you decide to use the cold connection method, then you need to use the technology described below. At the first stage, you need to cut off part of the pipe in such a way that you can obtain an element of the required length. For this purpose it is recommended to use a pipe cutter, special scissors or a hacksaw, the latter of which has fairly fine teeth.

If you are thinking about the question of how to properly connect polypropylene pipes, then next stage At the end of the product, a chamfer is removed, and it is important to maintain an angle of 15 degrees. In the process of carrying out these manipulations, a chamfer is used; it is important to prevent the formation of burrs. The next step is to thoroughly clean the fitting socket, as well as the pipe, from dust, dirt and moisture.

In order to achieve effective cleaning of the connecting elements, you need to use cleaners designed for pipes made of CPVC. With the help of this composition it will be possible to prepare the surfaces well enough for further gluing.

Nuances of the work

If you are faced with the task of how to connect polypropylene pipes without a soldering iron, then at the next stage you can apply glue. In this case, you need to use a brush, carefully distributing the composition over the surface of the socket and pipe. The elements are inserted into each other; to distribute the composition evenly, you need to rotate the fitting 90 degrees relative to the pipe. The parts are fixed for 30 seconds, during which time they should not be rotated again. It is important to complete the entire process within 1 minute. If you are thinking about how to connect polypropylene pipes without soldering, then after gluing is completed you need to check the presence of a bead, which is a uniform adhesive layer, located around the circle. You may have to get rid of excess glue using a soft rag.

Why is it worth using the cold method of joining plastic pipes?

Before connecting polypropylene pipes with fittings, you need to weigh all the positive negative sides other technologies. If we're talking about about the adhesive connection, which was described above, it is worth highlighting the advantages that it is possible to carry out high-quality installation pipes even in places where access is particularly difficult. The master will not have to use additional expensive equipment that can consume during operation a large number of electricity. It is possible to carry out the entire process independently, without resorting to the help of professional companies. In the process of gluing parts, a monolithic type structure is formed, which ensures the tightness of the joint. If you decide to use adhesive cold welding, then, unlike conventional welding, inner surface the product will not form sagging, which can narrow the lumen and contribute to the settling of solid particles.

Conclusion

If you connect polypropylene pipes to each other, following the simple rules and recommendations described above, then leaks and sagging of the pipeline will be eliminated. Service life of a pipeline installed according to similar technique, can reach 50 years.

Polypropylene pipes are used in the installation of water supply systems, for the installation of irrigation systems and for heating. Popularity of the material and various areas use is determined by its characteristics: strength, durability, ease of connection. An important argument in favor of polypropylene pipes was their price, which is significantly lower than that of metal-plastic or metal analogues.

Service life of a plastic pipeline with cold water is 50 years, such an impressive figure forces the replacement of outdated lines with this type of highway. The tightness of joints is the most important factor for any pipeline, therefore the viability of the system depends on the quality of installation. In the article we will talk about how to connect polypropylene pipes with metal, polyethylene, steel, and also consider various options welding

Materials and tools

If you decide to save on installation services and do it yourself, then you need to buy or rent a special soldering iron with attachments. In addition to this you will need:

• tape measure and marker for marking;
• scissors for cutting plastic pipes;
• cleaning for pipes.

There are several types of polypropylene pipes, which differ in their area of ​​use:

1. PN 10, 16 – used for laying cold water pipes;
2. PN 20 - universal pipes with thick walls, they can withstand hot water at temperatures up to 80ºC, therefore they are suitable for heating installations;
3. PN 25 is a composite pipe with a metal or nylon layer, which is peeled off during soldering. It is used for heating systems, the final heating temperature is 95°C.

A distinctive characteristic of polypropylene pipe connections is the absence of joints directly between the pipes. If their diameter is less than 50 mm, all parts can be connected with fittings for various purposes:

• couplings - connect sections of the same diameter;
• crosses - used to create branches;
• plugs - seal the end of the pipe;
• adapters - used to connect pipes various diameters;
• union fittings - connect to flexible hoses.

How to operate a welding machine

The principle of connecting a pipeline is to heat the elements and quickly connect them. Household Appliances for welding pipes have a power of up to 1 kW. It is enough to quickly and efficiently heat the material, but for industrial purposes more powerful and expensive devices are used. Included with the soldering iron are nozzles corresponding to the diameter various pipes. The pipe is heated from the outside, and the fitting from the inside.

The operation of the soldering iron begins with connecting it to the network and setting the desired heating temperature, depending on the diameter of the plastic pipes being welded. The average value is 250–270°C. Such heat requires caution, touching a hot part will cause a burn; for safety reasons, you should wear gloves.

Soldering process

To cut pipes, use a hacksaw or sharp scissors that do not deform the plastic. The incision is made at a right angle. If burrs appear on the end, they are carefully cleaned off. After cutting, the soldering depth is marked. You need to measure the section of pipe that will fit into the tee or coupling and mark a line with a marker. The size of this section depends on the diameter of the pipes; the larger it is, the greater the immersion in the connecting element.

If you have to work with reinforced pipes, the algorithm of actions changes. Must be cleaned before soldering upper layer pipes consisting of aluminum foil, basalt or nylon fiber. A special tool is designed to remove the required layer size.

Careful removal of the foil is very important; a small amount of material remaining on the pipe will ruin the tightness of the soldering.

A soldering iron with nozzles selected according to the diameter of the pipes is installed on a flat and durable surface. On both sides, a pipe and a fitting are simultaneously put on the heated nozzle, deepening to the intended line. The heating time of the plastic depends on the size of the pipes: for 20 mm, 6 seconds are enough, and for 32 mm, 8 seconds are required. After maintaining a set period of time, the elements are removed and firmly fixed into each other, while turning movements must not be made. For strong adhesion of the joint it will take from 4 to 10 seconds, during which time the polypropylene will harden and form a permanent connection.

Failure to comply with the recommended heating time leads to the formation of leaks - due to insufficient heating or sealing internal space- with excessive overheating. If a melt appears, you should not try to remove it immediately; the melted plastic will become more deformed. You need to wait until it cools and cut off the excess.

Without experience, in order to understand how to solder pipes correctly, you can make several training connections. It is convenient to work with short connections by placing the welding machine on the table; in this position you can complete all possible job, and joining a partially laid highway is more difficult. The soldering iron nozzle is put on a fixed polypropylene pipe, and a tee is inserted into the second part, while the device is supported by weight. When making a highway, you need to monitor the order of the connections being made. Try to avoid docking hard to reach places where it will be difficult to use a soldering iron.

It is important to keep the material clean and dry, because dirt and moisture reduce the quality of the pipe connection. Even a small amount of moisture deforms the material when heated. Chemical composition pipes from different manufacturers may not match, this will lead to a leaky joint. It is necessary to buy all the material - pipes and fittings - from one manufacturer.

The temperature in the room where polypropylene is installed should not fall below +5°C.

Crimp connection method

Pipeline joining by soldering is reliable and durable, it is impossible to disassemble it, and sometimes this is exactly what is required for repairs. In addition, it is not always possible to purchase or borrow a welding machine; in such cases, they use the method of connecting polypropylene pipes without soldering. For this, fittings with threads and a clamping ring are used. They are called collet or crimp, such a connection can withstand a pressure of sixteen atmospheres.

For a mechanical connection, it is necessary to purchase several additional parts: angles designed for joining of different diameters, a tee, soldered and combined couplings, having external and internal thread, plugs, adapters with external thread, elbows and tees with a union nut, Ball Valves, various fittings with factory thread.

To ensure tightness, joints and seals are generously lubricated with silicone.

To work, you will need a crimp wrench, which can be purchased at the same time as the fittings. Having cut off the required part of the pipe, firmly insert it into the fitting, wrap the thread of the element with thread to seal it and tighten the ferrule and nut, completely tightening it with a wrench. This connection method takes much longer than welding, but it is convenient for connecting polypropylene pipes to radiators.

Joining a steel pipe with a polypropylene pipe

When installing heating or plumbing, there are areas where metal and plastic need to be joined. The connection between a polypropylene pipe and a metal pipe occurs using special adapters. This fitting has a smooth hole for plastic on one side and a metal insert threaded. The polypropylene pipe is connected by welding, and the metal pipe is screwed with a wrench. The resulting joint does not have the strength of a welded joint, but will serve for a long time.

After complete installation the system needs to conduct a test run of water to check the tightness of all connection points of pipes and other elements. If threaded connections are leaking, they must be tightened.

Self-installation of plumbing or heating from polypropylene pipes is a completely doable task. To implement it, you must strictly follow the instructions for using the plastic welding machine and installation technology. To better understand all the nuances of the process, you should watch a video in which experienced installers share their experience.

To connect such pipes you need to use special fittings. Such a connection is necessary in cases where water was introduced into the house using HDPE pipes, and further distribution of water inside the house is carried out using polypropylene pipes. So, we can distinguish 2 types of connections:

1. In the first case, you attach a threaded coupling to the HDPE pipe, where there will be a clamp connection on one side, and a similar coupling on the polypropylene one. It’s just that there will be a solder joint on one side, and a threaded joint on the other. In both cases, FUM tape or tow is used for threading to seal the joint and avoid leaks.
2. In another case, a flange connection is used. A rubber seal is installed between the flanges. The flanges are bolted together.

Methods for connecting plastic pipes
Products made of polypropylene
Joining of metal-plastic pipes
Compression fittings for water pipes
Connection of polyethylene pipes
How to connect PVC pipes

To independently install a water supply system from plastic pipes, you do not need a lot of knowledge and experience, since this process is not complicated. However, to improve the quality of the work performed, it is necessary to become familiar with the technology and some of the nuances of connecting pipe elements of this type. It is also important to learn a few lessons about how to connect different types plastic pipe and the main points of this process.

Methods for connecting plastic pipes

Firstly, it is worth noting that plastic pipes include products made from the following materials:

• Polypropylene.
• Metal-plastic.
• Polyethylene.
• Polyvinyl chloride.

Each material has certain properties, therefore, the connection of products is carried out different ways, including soldering polypropylene pipes without a soldering iron (read also: “How to connect polypropylene pipes - a review of proven joining methods”). For greater awareness, it is worth learning how to connect water pipes made from these materials.

Products made of polypropylene

Polypropylene pipe is the most popular material for plumbing. This is due to the presence of some advantageous points: reasonable price, high strength and long service life. Therefore, learning how to connect all types of plastic pipes should start with this type.

Polypropylene pipes are connected by welding with the obligatory use of couplings, angles, tees and other fitting elements. When connecting polypropylene pipes for water supply, you need to purchase pipes and fittings from the same manufacturer. Otherwise, even strict adherence to welding technology cannot guarantee complete tightness and quality.

To connect polypropylene water pipes with your own hands, you need to have the following tools on hand:

• Special soldering iron.

  That's what it's called simply welding device with a set of special nozzles that allow connecting pipes of different sections. In this case, the nozzle for each pipe is selected individually in accordance with its cross-section.

• Cleaning up. This tool is used to cut off the reinforcing layer at the ends of the pipes. Stripping is used only for multilayer reinforced pipe products.
• Pipe cutter By its name you can tell that the device helps cut polypropylene pipes.
• A tape measure, pencil or marker may also be needed in the process of joining polypropylene pipe products.

Installation plumbing system made of polypropylene pipes is performed as follows:

1. Turn on and warm up the welding machine. The device must go through three phases: heating to a certain temperature, switching off, and reheating. The operating mode can be monitored by a light indicator (read also: “Types of welding PVC pipes, advantages and disadvantages of methods”).
2. While the soldering iron is heating, the reinforcing layer is stripped in the place where the fitting will be welded.
3. Dust and dirt are cleaned from the surface of the elements to be joined and wet areas are wiped well. Please remember that failure to follow these steps may result in a weak connection.
4. The end of one pipe and the connecting element are inserted into the heating nozzle and kept for a certain period of time. The heating time must be strictly controlled, since holding it for a long time leads to deformation of the elements, and insufficient heating reduces the strength of the connection of plastic water pipes. Therefore, each welding machine is accompanied by a special table, which indicates the heating time of parts having a certain diameter.
5. The heated elements are pulled out of the nozzles and quickly connected. The strength of the connection also depends on the speed of action at this stage, so the process must be performed quickly but carefully. The pipe is inserted into the fitting until it stops, but it should not be deformed. The connected parts should be held until the plastic has completely cooled.
6. In a similar way, all elements of the water supply system are connected. To avoid damage to the material, you need to perform actions on unnecessary pipe scraps. The process of welding polypropylene pipes is quite complex, but after a few trial steps you can start working on your own.

Joining of metal-plastic pipes

Compound metal-plastic pipes You can also make these products yourself using one of three methods:

1. Connecting using compression fittings involves performing the following actions: the end of the pipe is put on the collet, secured with a compression ring and compressed with a clamping nut.
2. Connecting with crimp fittings involves compressing the ring at the end of the fitting using a special press.
3. Docking with push fittings is a new joining method that does not require any tools.

   This method may be the answer to the question of how to connect plastic pipes without soldering.

Regardless of the chosen method of connecting metal-plastic pipes, the tools should still be prepared. In particular, you will need a pipe cutter, which can be replaced with a regular one assembly knife, and a calibrator, which can be any cylindrical object of a certain diameter.

The most popular is the connection of metal-plastic pipes using compression fittings, which involves the following steps:

• First, the pipes are cut using a knife or pipe cutter, ensuring a right angle to the cutting line.
• Before connecting the pipes, the cut ends are processed, that is, the diameter is calibrated and chamfered, using a calibrator in both cases.
• The nut is removed from the fitting and placed on the end of the pipe, followed by a compression ring.
• Now the collet is inserted into the end of the pipe, having first checked the presence of rubber O-rings.
• Slide the clamping ring onto the collet and tighten the nut on the fitting. In this case, you should not allow the nut to be over-tightened, as this will lead to damage. rubber seals(read also: “What and how to connect PVC pipes – optimal ways connections").

All water supply elements are connected in a similar way. Such installation is characterized by one advantage: a minimal set of tools for work, which any owner has at hand. In addition, this is the only option that allows you to get a detachable connection, which is necessary in some situations.

Compression fittings for water pipes

The connection using compression fittings is carried out in the same order, only the compression ring and nut are replaced with a ferrule ring. A manual or electric press is used to compress it.

Push fittings make it possible to connect metal-plastic pipes much faster than previous methods. To complete the work, it is enough to insert the prepared end of the pipe into the connecting piece, and all actions are performed without much effort.

When water is supplied to the assembled system, the fitting wedge is pushed out and clamped, thereby preventing water leakage. This method does not require special tools or wrenches, and the installation itself is several times faster. Read also: “How to install plastic pipes - basic installation rules.”

Push fittings can be used to connect pipes made of metal-plastic and cross-linked polyethylene.

The connection using any of the listed methods is sealed and reliable, so you need to choose depending on the available tools and financial capabilities.

Connection of polyethylene pipes

Polyethylene pipes can be connected using one of the following options:

• Using compression fittings.
• Welding using an electric coupling.

Compound compression fittings performed in a similar way to metal-plastic pipes, but in a certain sequence:

• The pipe is cut and chamfered.
• A clamp nut is placed on the pipe.
• It is followed by a collet.
• Next, put on the thrust and sealing rings in turn.
• The pipe is inserted into the fitting body, all parts are moved to the edge and the nut is tightened.

This method is most often used when assembling household irrigation systems in country houses or on a summer cottage.

The connection of metal-plastic pipes in domestic water supply systems is carried out using electrofusion welding. Therefore, to perform the work you need to have a special welding device and an electric coupling with a diameter in accordance with the cross-section of the elements being connected.

The welding procedure involves performing the following steps:

• Preparation of the surface of the elements to be joined. To do this, use a special scraper to remove the top layer of pipe products and degrease the cleaned area.
• The ends of the elements to be connected are inserted into the electric coupling, and the joint should be located exactly in its middle.
• The electric coupling is connected to welding machine and the spirals inside it begin to heat up. As a result, the polyethylene begins to melt and welding of the edges of the pipe elements occurs.

A machine for this type of welding has a very high price, so if it is not intended to be used further, it is better to rent the device for a few days rather than spend a large amount for its one-time use.

How to connect PVC pipes

Pipe products made of polyvinyl chloride are connected using a special adhesive composition. However, it is very difficult to call it glue, since when the surfaces being joined are treated with this substance, the plastic melts and the edges are welded and not glued together. In other words, pipes are soldered without a soldering iron.

The process of connecting polyvinyl chloride pipes is as follows:

• First, the edges of the pipes to be connected are cleaned of dust and dirt and dried well.
• Then the ends are chamfered. This action must be performed so that the adhesive composition is not scraped off when connecting the elements.
• Next, one end of the pipe is inserted into the fitting to measure its depth. Make a corresponding mark on the pipe with a pencil or marker.
• The end of the pipe is treated with adhesive to the mark using a brush. At the same time, we should not forget that you cannot leave the glue on the surface for more than 25 seconds.
• The elements are connected and slightly rotated to evenly distribute the composition over the entire surface. The glue should dry naturally without any external influences. The drying time of the adhesive composition may be affected by air temperature and other factors.

Based on everything said above, we can conclude that in most cases the connection of plastic pipes can be done with your own hands, without having at hand special devices and without possessing special knowledge and skills. The main condition is strict adherence to technology. It is also important to listen to the advice of professionals. This will help install the water supply without unnecessary material costs.

A significant increase in the replacement of obsolete water supply networks has led to the emergence of a leading material such as polypropylene pipes. Therefore, today we’ll talk about how to do this work, what are the advantages of communications made from such material.

Advantages of polypropylene pipes and their scope of application

First of all, you need to know thanks to what qualities polypropylene pipes could so quickly become the most popular material for laying water supply and heating systems.

Advantages of polypropylene pipes:

• Polypropylene pipes are highly resistant to corrosion processes. In addition, there is no deposition of mineral salts on the inner walls of the pipes, due to which the cross-section of the pipeline does not change during the entire period of operation.

• The guaranteed service life of pipes is 50 years (subject to operating modes, temperature and pressure).
• Polypropylene pipes can be operated at liquid pressures up to 25 atmospheres, working temperature is 95, and the maximum permissible (for a short time) reaches 110 degrees.
• This material is quite resistant to various chemicals.
• An important, and in some cases, the main role is played by the relatively low price and ease of installation of lines made of polypropylene pipes.

The scope of application of such pipes is quite wide; they are used for laying the following pipelines:

A prerequisite for the use of polypropylene in these areas is strict adherence to soldering (welding) technology, and for this you need to know how to properly solder plastic pipes and what tool is used for this.

Tool for soldering polypropylene pipes

First of all, you should decide on the choice of tool that is used for soldering polypropylene pipes. To carry out work on household level It is quite enough to purchase an inexpensive minimum set of equipment, which includes:

Welding machine (soldering iron). The main task of this tool is to heat the surfaces of the elements being connected to a temperature of 260 degrees. It is under these conditions that the diffusion welding process is possible, which results in a permanent connection, which in its properties is not inferior to the material of the main pipe.

Before choosing a soldering iron for plastic pipes, you need to determine its main scope of application. For household use Models with a power of 900-1200 W are quite sufficient; for professional purposes it is worth purchasing more powerful equipment, the cost of which is much more expensive.

When choosing, you should pay attention to the following design features tool:

It is these design features of the soldering iron that will determine the ease of working with it and its durability.

Nozzles for soldering pipes. Inexpensive tool kits usually include 3-4 attachments for working with pipes of various diameters. If necessary, such attachments can be purchased separately. The main feature of such elements is the high-quality non-stick coating. Typically, Teflon is used for these purposes, professional instrument A higher quality layer of this material is used, which practically prevents polypropylene from sticking during the soldering process.

Special plastic scissors are used to cut polypropylene pipes. They differ reinforced structure, allowing you to cut even reinforced pipes. Such a tool is included in any minimum kit for soldering polypropylene pipes.

To work with reinforced pipes, you also need a device that allows you to remove a chamfer from the workpiece along with a layer of aluminum foil. It is not possible to solder reinforced pipes without removing this layer. Of course, you can remove reinforcement using a simple knife, but with this device the operation is performed faster and with better quality. Unfortunately, most tool kits do not have such a device, so you need to take care of purchasing it separately.

Rules for soldering polypropylene pipes

Before soldering plastic pipes made of polypropylene, it is necessary to perform a number of preparatory operations:

In general, the procedure for soldering polypropylene pipes is not complicated. The main thing is to respect the dimensions and maintain the temperature treatment time. Then the resulting joint will last quite a long time.