How to change metal pipes plastic. How to replace water pipes in an apartment with your own hands

Ways to connect plastic pipes with metal: analysis 2

Connection methods plastic pipes with metal: analysis of 2 best practices

Features of mounting threaded fittings

Fittings are called adapters, on one side of which a thread is applied. It can be both external and internal. This part of the part is intended for fastening metal elements.

On the other side is a smooth sleeve for soldering plastic. Practice shows that with the help of fittings of various configurations it is convenient to perform turns and bends in the pipeline being installed.

You can't do without flexible hoses and plastic pipes if you want to have a modern stove and oven, washing machine and dishwasher in the kitchen. Moreover, it is necessary to arrange all the equipment in accordance with design project, which may suggest the most non-standard solutions. Implement such global rework only possible with plastic pipes.

In terms of their performance characteristics, plastic pipes are significantly superior to metal pipes; they are durable, convenient, and easy to install. The whole difficulty in installing new plastic pipes lies in the dismantling of old metal pipes, welded for centuries and requiring the work of several people.

Undoubted advantage plastic pipes is the ease of their delivery to the house or apartment. They are light weight and will easily fit in your personal car. If you are going to transport pipes longer than 2 meters on the roof of the trunk, then the only thing you will have to take care of is the comprehensive insurance for your car and reliable load securing.

Modern stores offer a wide range of plastic pipes, and you can easily choose the best option for the price and quality characteristics. Coping with the calculation of the cost of buying pipes on your own is not easy, so it is better to consult with a specialist.

It is better to buy pipes on your own, according to the list that the plumber will make. If you looked into the hull calculator in time and took out a good car insurance, then you can deliver the pipes to your home on your own. This will save up to 20-30% of the cost of do-it-yourself plastic pipe repair. But it’s not worth doing the installation of pipes yourself, since this is a laborious and complex process, it can be difficult even for an experienced plumber to cope with the removal of old metal pipes.

After the pipe replacement work is completed, you can proceed to the next stages of repair. You can bring to life any design project for a kitchen or bathroom.

Pipe replacement: plastic or metal

Man has always strived for the best, and everyday problems are no exception. Plastic pipelines help to make life more comfortable. Today, plastic pipes of various types are used in construction, which surpass concrete and metal products in their performance. Until recently, the production of HDPE plastic pipes was on the same level as metal pipes, but beyond last years the use of plastic pipes has tripled, and this trend is typical for all European countries.

Why are plastic pipes attractive to the average consumer? Several indicators:

– an average of 50 years.

Fire safety– low flammability of plastic.

Protection against moisture and dirt - anti-corrosion properties.

Light weight - easy to transport and install.

Economic cost.

Retail availability.

Connection methods

The process of replacing metal pipes with plastic ones is quite simple and easy to replace a video outlet. You can replace pipes without the help of professionals, on your own. When installing plastic pipes, several types of connections and fasteners can be used: fittings, couplings, Ball Valves, tees, crosses, etc. All accessories for plastic pipelines are available and freely sold in stores and on construction markets. Depending on the diameter of the pipe, the type of plastic and the purpose of the design are selected various ways installation. For example, for metal plastic pipelines the welding method is not suitable, in this case brass fittings are used. The assembly of polyethylene structures is carried out by welding, as well as using compression fittings. Sewer systems are mounted using parts using the mechanical assembly method.

Pipeline systems of HDPE pipes for water supply are connected by the butt method or by the socket welding method for better sealing. When assembling pressurized water supply systems, chrome-plated brass fittings can be used to transition pipes of various diameters, as well as with inner pipe to the outside. Brass fittings are also used to connect heating and gas equipment: boilers, radiators, boilers, geysers. For socket welding, an additional connecting piece is required - polymer fitting. To connect a plastic product and a metal fragment, plastic parts with an internal metal thread are used. Welding will require special devices that are convenient to use at home, for example, for repairing a bathroom, due to their compact dimensions and ease of operation.

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Specialists - Krasnodar Vodokanal - are replacing metal pipes with plastic ones

Specialists of Krasnodar Vodokanal are replacing metal pipes with plastic ones

Specialists of Krasnodar Vodokanal LLC (part of the Rosvodokanal group of companies) are carrying out measures to replace water pipes. The work was carried out on Krasnoarmeiskaya Street: there are 80 meters of metal water networks, built in 1954, were replaced with plastic ones within two days. As a result, the quality of water supply to a residential building has improved and medical center.

Plastic pipes have a longer service life than metal pipes, they are much better in quality, and their installation requires much less time than the construction of steel conduits, said Stanislav Geraskov, head of the water supply department of the enterprise, quoted by the press service of Krasnodar Vodokanal LLC .

He added that the replacement of water supply networks is provided production program enterprises. According to the action plan for this year, work to replace water conduits will be carried out at several dozen addresses, in particular, along Studencheskaya, Sadovaya, Promyshlennaya, Krasnoarmeyskaya, Aivazovsky, Komsomolskaya, Budyonny, Oktyabrskaya and others.

Replacement steel pipes on plastic

Those who live in apartments built in the last century have repeatedly encountered problems associated with water supply and sewerage: at the most inopportune moment (although what moment in this case can be appropriate?), the pipes began to flow, clogged, and the owners had already time to turn to a plumber for help. Not much time passed, and everything repeated again. Familiar situation? main reason that before everything multi-story houses were commissioned with steel pipes replacing plastic sewer pipes. At that time, these were the most popular and, as it was then considered, reliable designs. But the owners of square meters in modern new buildings Fortunately, they don't experience such problems. This is because steel pipes that are susceptible to corrosion have been replaced by products from more modern materials that easily withstand any negative influences how aggressive external environment, and not always quality water.

Today, experts strongly recommend abandoning steel pipes and replacing them with plastic ones. Let us consider in more detail what advantages plastic pipes have. why are they preferred plumbing? First of all, such pipes are produced in various options so there are plenty to choose from. At the request of the customer, it is possible to install products made of metal-plastic or polypropylene. In addition, manufacturers offer sewer pipes, which are much stronger than other analogues. Plastic pipes are lightweight and easy to install. Since their advantages include increased wear resistance, such pipes almost do not require replacement.

In order to determine the degree of strength of water pipes, experts use the MRS coefficient, which has indicators of 6.3, 8 and 10. It is the number 10 that corresponds to the parameters of PE 100 polyethylene pipes. Their main advantages are that such pipes are much lighter than steel pipes, they are easy maintain temperature fluctuations within -50+60 C and can serve about 50 years. Such a long period is possible due to the fact that plastic pipes are anti-corrosion and do not accumulate condensate, which allows them to be used in conditions with high humidity bearing replacement washing machine indesit. Pipes with firmness maintain any stream of water, even the strongest. Long-term tests have proved that the designs PE 100 and PE 80 do not interact with an aggressive environment, they are not afraid of stray currents.

Having decided to replace metal water pipes with plastic ones, you invariably face a choice: what type of pipes to supply? Today the market offers a sufficient number of types of pipes from polymer materials: plastic (polypropylene, polyethylene, cross-linked polyethylene, etc.) and metal-plastic with a combined polyethylene-aluminum-polyethylene structure. Moreover, each of these types has its own varieties depending on the design, material and method of manufacture. However, it can be noted general properties inherent in all types of plastic pipes, both positive and negative.

General properties of plastic pipes

Meeting the main requirements for pipes - durability and reliability, pipes made of polymeric materials simultaneously combine other positive consumer qualities, such as:

low cost compared to metal pipes;
low formation rate limescale associated with this narrowing of the inner diameter of the pipe and the presence of the number of various microorganisms and bacteria;
resistance to pollution and corrosion; low thermal conductivity;
quick and easy assembly and disassembly.

The disadvantages of pipes made of polymeric materials include:

certain restrictions on the maximum temperature and pressure of water when used in heating and plumbing systems;
the need for various technologies during the installation of each type of pipe;
combustibility of the material of plastic pipelines, which is especially important for high-rise buildings.

Thus, when replacing pipes with plastic ones, their advantages far outweigh the disadvantages, while each of the listed types has its own specifics, features and individual properties.

Metal-polymer pipes

Appearing on construction market in the early 80s, metal-polymer pipes immediately began to be actively used in heating systems, internal cold and hot water supply. Since then, the technologies for the production of such pipes have improved significantly, which was determined by the following reasons: an increase in the market share of plastic systems; an increased need for innovation to increase sales; the possibility of blocking the penetration of oxygen into plastic heating systems.

The main advantage of multilayer metal-plastic pipes in heating and water supply systems is the combination of the advantages of plastic and metal pipes into one combined material that has good corrosion resistance and flexibility, combined with sufficient tensile strength.

XLPE pipes

Cross-linked polyethylene is one of the polymeric materials obtained by the method of chemical cross-linking of high-density polyethylene molecules under conditions high pressure and temperature. XLPE pipes have good mechanical and physical and chemical properties, among the operational and installation advantages of such pipes can be noted: the possibility of using in radiator and floor heating, in hot and domestic drinking water supply; impact resistance chemical compounds; high degree of resistance to mechanical stress; the ability to withstand several freeze-thaw cycles; low coefficient of thermal conductivity ensures slow cooling of the coolant in the system; flexibility of pipes, allowing them to be bent to the required angle by cold bending; molecular shape memory, allowing you to easily correct the wrong bend.

One of the main disadvantages when replacing pipes with plastic ones made of cross-linked polyethylene is the high diffusion (penetration) of oxygen, which leads to additional corrosion of the equipment, as well as the possibility of damage by rodents.

Polypropylene pipes

Polypropylene is a long-established and well-proven material for pipes of cold and hot water supply systems. The main advantage of polypropylene is the possibility of welding and, accordingly, the use of cheap connecting elements. At the same time, the product range is represented by the widest range of such elements.

Due to low cost and availability, exceptional simplicity and speed of installation polypropylene pipes are especially popular when replacing pipes with plastic ones and occupy a significant market share.

Of course, when replacing pipes with plastic ones in each specific situation it is necessary to calculate the technical and economic feasibility of using a particular type of material. But in general, when comparing plastic pipes made of polypropylene, cross-linked polyethylene and metal-plastic according to the criteria of price / quality / availability, polypropylene pipelines will have an advantage.

Previously, the basis of sewer networks in houses was made up of cast-iron pipes. Today they have been replaced by more practical, plastic designs. Replacement of cast iron sewer pipes on plastic - a problem that interests many, since the old systems are already worn out and require updating. How to replace cast-iron pipes in an apartment with plastic ones? This issue requires detailed consideration.

Cast iron pipes - the basis of sewer networks earlier. However, they do wear out over time and need to be replaced.

Why cast iron is being replaced with plastic

Before considering in detail the issue of replacing water supply and sewerage pipelines in an apartment, let's figure out why plastic products are preferred today.

Plastic and other polymers are a fairly young material that has been actively used for only a few decades. Before its appearance, cast iron was used everywhere in the public sector. It was affordable, provided durability and reliability.

With the advent of plastic, the situation has changed. It displaced cast iron due to its cost, availability, and other advantages.

Advantages of plastic elements over cast iron counterparts:

Durability. The designated period of effective operation is about 50 years.
Resistance to corrosion processes.
Light weight.
Perfect smoothness internal surfaces reduces the likelihood of blockages.
Low thermal conductivity.
Environmental Safety.
Ease of use, flexibility.
Applications in networks of external and internal lines of water supply and sewerage.

Plastic structures also have a number of disadvantages that should be considered when choosing them. The disadvantages include:

Restrictions for use in plumbing hot water and heating.
Low resistance to constant exposure to direct sunlight.
Decrease in strength and reliability characteristics over time.
More high level noise during operation compared to cast-iron counterparts.
Impossibility of use for fire networks.
Differences in the mounting system various types and types of polymers, which complicates the "mixed" use.

Today, the following types of materials are used in the municipal sector:

polyvinyl chloride (PVC);
polypropylene (PP);
polyethylene (PE);
cross-linked polyethylene (PEX);
metal-plastic.

Each type has its own advantages and disadvantages.

In what cases is it worth replacing cast iron pipes on plastic ones? If a old system metal sewerage works properly, there are no visible visual defects, it is not worth rushing to make a replacement.

Replacement is necessary in the following cases:

Accident.
Significant visible defects and deterioration of old networks.
Repair in the apartment (it is better to make a replacement in the course of the repair work, so that in the future you do not have to be repaired again in the event of an accident or wear and tear).
Remodeling work.

It is quite difficult to replace pipes in an apartment on your own.

This work is carried out in several stages:

Inspection of existing networks.
Preparation of plans and drawings.
Calculation of the amount of materials.
Purchase of necessary items.
Preparation of tools and facilities.
Test assembly of the new system.
Demolition of old structures.
Installation of a new system.
Connection and performance testing. Troubleshoot if found.

Preparatory activities

Replacing pipes with plastic ones begins with the stage of inspecting the replacement site and calculating required amount materials. A detailed inspection will allow you to see difficult areas, determine possible options simpler and more competent laying. Replacing sewer lines can be significantly more complicated if a riser needs to be replaced. This point should always be taken into account.

The quantity of materials is determined by the area on which the replacement will be made. This aspect also depends on the features of the sewer distribution plan. If the new line is completely consistent with the old one, it is very easy to make the calculation. The number of straight pipes, their length, the number of connecting and other elements are measured.

If the layout of the sewer system is changed, it is worth making the calculations especially carefully. It is recommended to draw up a drawing for a visual display of all elements. Do not forget about the basic requirements for the installation of a sewer system.

What details may be required:

Knee.
Corner.
Tees: straight or angled.
The coupling is connecting.
Reducing tee, reduction (transition of pipes of different diameters).
Stub.

Details that may be required to build a sewer system

To perform work on replacing water pipes in an apartment, you will need the following tool:

chisel;
a hammer;
impact drill, perforator;
level;
roulette;
grinder, saw;
sealant;
goggles, respirator;
pencil, marker.

In some cases, when connecting structural elements, a torch or blowtorch may be required. With their help strong and tight welding is made.

Before starting dismantling, it is worth making a test assembly of the new system. To do this, pipes and other elements are laid out on the floor at the place where the sewer network passes. Compliance with the configuration, length and other parameters is checked. Sections in the walls and other nuances are measured conditionally.

Dismantling

Before starting work on dismantling, the water in the house is turned off. If the riser is also removed, you need to warn the neighbors upstairs so that they do not use the water and toilet for the next few hours.

Initially, the wiring from the riser around the apartment is dismantled. Disassembly starts from the sink, tub and toilet. Special attention should be given to areas in the walls. fights back here cement mortar with which the pipe was fixed. During disassembly, removal fasteners from the wall. Then the pipes are pulled out. For convenience, they can be cut into pieces.

In the area of the connection with the riser, the pipes are carefully incised in two sections (the width of the notch is 10-15 cm). The trimmed residue is carefully pulled out of the riser tee.

The riser pipe is sawn in two places: at the top, at a distance of about 10 cm from the ceiling, and at the bottom, at a distance of about 60 cm. The grinder makes an incision in the riser in two places. The distance between the incisions is 15-20 cm. After that, the riser is pulled out of the pipe.

Work must be done carefully so that the sections of the riser in the upper and lower apartments remain intact. The upper section during the work must be fixed. It is important not to damage the riser in the ceiling. You don’t have to worry about this if work is carried out to replace the riser throughout the “vertical of the house”.

Installation

Markings are drawn at the places where the system passes. The intended places of fixation to the wall, the level of inclination, the distance from the floor are indicated.

Cutting of pipes is carried out strictly at a right angle without distortions. Particular attention should be paid to chamfering (beveling the end edge for a snug fit with another part). There should be no bumps, hooks, burrs, etc. on the chamfer. They are carefully removed with a file or sandpaper.

Appearance of the machined chamfer (beveled end edge for a snug fit with another part)

A gasket is inserted into the socket, which is treated with a sealant for fixation. The bells must necessarily face the flow of water. Assembly is carried out in sequence from the riser to the plumbing fixtures (from bottom to top). The connection to the toilet is made with corrugated pipe. All joints are additionally treated with sealant.

When connecting pipes, a gap of at least 100 mm must be left. It will ensure safety as a result of a change in dyne under the influence of thermal expansion.

To do this, the pipe is inserted into the socket or other part "up to the stop". The connection level is fixed with a line. From the mark, the pipe extends 100 mm. So, under the influence of temperature there will be no deformation and leakage.

Fixing to the wall is done with clamps. They are fixed in the area of the bell. Fasteners are mounted at certain intervals:

vertical pipe - every 100-150 mm;
horizontal - through a distance equal to ten diameters.

Clamps are used on bolts with a rubber seal.

sewer riser

It is not recommended to change the cast-iron riser without good reason. To carry out such work is quite problematic and difficult. If it is impossible to do without replacing the riser, it is done first.

A branch pipe is placed in the cut pipe until it stops and is fixed with a sealant. A test assembly of the remaining elements of the riser is carried out, without sealing and installing sealing gaskets. If everything fits in length, the final installation is made.

Replacing a cast-iron riser with a plastic one provides for the fulfillment of several mandatory requirements:

A pipe with diameters of 100-110 mm is used as a riser.
On the riser, an inspection hatch is installed without fail, which is blocked by twisting the sealed plug.
Sewer pipes are brought to the riser at a certain angle.
The riser must have on the lower section: a tee, a revision and a coupling.
The new riser is inserted into the socket down tube. If this cannot be done, the connection is made using a special coupling. A coupling is also used for the top fastening.
The riser is fixed with at least three fasteners (with standard height ceiling).

The slope of the supply of plastic pipes ensures the rapid removal of water and waste, prevents the formation of blockages and "plugs".

It is better to replace the riser along the entire height of the house (in all apartments). If the riser changes in only one apartment, the work should be done very carefully so that fragments and debris do not get into the system. Otherwise, clogging may occur.

When the replacement of sewer pipes from cast iron to plastic is completed, its effective operation is checked. To do this, a large amount of water is passed through all the branches of the system. If the riser is replaced, ask the neighbors from the “upper” apartments to spill water. If there are no leaks, the system can be used. First time (month) preventive measures, it is better to periodically inspect all elements of the new apartment sewer system.

Metal pipes today can no longer be called the only material suitable for arranging a pipeline. Metal products were replaced by plastic ones, which have a huge amount of positive qualities. Plastic pipes are so good that even an existing steel pipe pipeline is often completely replaced with plastic. This article will discuss how to change pipes to plastic ones.

Advantages and disadvantages of plastic pipes

Polymer products have a lot of advantages, among which it is worth highlighting:

Long service life (modern plastic pipes can sometimes work for about 100 years);
Light weight of the material;
Complete resistance to corrosion;
Ease of installation;
Good strength indicators;
Good level of sound insulation;
High elasticity;
environmental safety(plastic pipes do not change the chemical composition of the transported water);
Low degree of thermal conductivity;
Versatility;
Ease of transportation;
Small cost.

The list of benefits is impressive. The described qualities provided plastic pipes with recognition and the title of one of the best materials for the arrangement of any pipelines - it is not just that old pipes are replaced with plastic ones in most houses and apartments.

Of course, plastic pipes also have disadvantages, but their list looks much more modest than the list of advantages:

Polymer pipes have restrictions on the temperature of the transported substances (specific values \u200b\u200bdepend on the material);
Variety of mounting technologies (for mounting different types plastic pipes are used different technologies);
Exposure to certain types of alkalis and acids (when choosing pipes for transporting aggressive substances, one has to carefully study their characteristics).

Classification of plastic pipes

There are several materials based on polymers. The final products differ in their composition and production technology, therefore, before purchasing, it is necessary to study them in order to choose the best option.

The following types of plastic pipes are found on the market:

Metal-plastic (MP). This material made, as the name suggests, of metal and plastic. This combination well withstands the effects of both low and high temperatures - certain types metal-plastic pipes can operate at a carrier temperature of 900 degrees. The main disadvantage of this material is its low flexibility, so the pipes must be bent very carefully.
Polyethylene (PE). Polyethylene pipes it is quite possible to mount even with negative temperatures, so they are often used for urgent repairs. When choosing PE pipes, you need to pay attention to the fact that it can be calculated to work in conditions of either low or high pressure.
Cross-linked polyethylene (PES). This material is made under pressure with the help of various additives, and its production method is called "crosslinking" - hence the name. Cross-linked polyethylene can be used both in the water supply system and in heating systems- characteristics allow the pipes to work at a sufficiently high temperature.
Polyvinyl chloride (PVC). One of the components used for the production PVC pipes, is chloride, the effect of which on human body cannot be called positive. PVC pipes are not used when laying domestic pipelines.
Polypropylene (PP). Polypropylene pipes are the best material for laying water supply systems. The multilayer construction provides such pipes with good strength and the ability to work at high temperatures. Of the minuses, it is worth noting very poor elasticity and the lack of the possibility of painless replacement individual elements- the connection of polypropylene pipes is carried out by welding, so the damaged areas will have to be cut out completely.

Replacing pipes with plastic ones - how to change it yourself

The first step is to figure out how to replace metal pipes on plastic. This process is not very complicated, but the work must be approached with all responsibility - even the best material cannot compensate for the incorrect assembly of the pipeline.

Before replacement, it is necessary to draw up a work plan that, in in general terms as follows:

First you need to draw a plan that will display all the actions;
Next, the required amount of materials is calculated (if the plan was drawn up on a scale, then you can use it);
According to the calculations, materials, connecting elements and tools for working with them are purchased;
Immediately before the start of work, the water is blocked;
The old pipeline section is being dismantled;
Plastic pipes are installed on the vacated place;
After assembly, the system must be checked for operability;
The last step is the removal of construction debris.

Knowing how pipes are changed in an apartment, and having a detailed plan will allow you to carry out all the work consistently and carefully.

Dismantling of old pipes

Dismantling the old pipeline is a process that must be approached individually. Some elements of the system may be able to be dismantled with a screwdriver or adjustable wrench, while in other situations a grinder will be required.

The general set of tools required for dismantling is reduced to the following list:

A hammer;
Bulgarian;
Perforator;
Chisel;
grinding discs;
Screwdriver Set;
A pair of spanners.

It will be ideal if the replacement of pipes with plastic ones is carried out along with the repair of housing - firstly, you won’t have to take out the garbage twice, and secondly, during the repair it is much easier to hide communications in the walls, if such a desire arose.

Installation of plastic pipes

After the dismantling of the old parts of the pipeline, events can develop according to two scenarios:

In place of the removed elements, parts made of plastic will be installed;
The entire pipeline will be re-laid.

In any case, no matter which scenario is chosen, pipes will still have to be connected, and for this it is necessary to select the appropriate technology. In most cases, plastic pipes are connected with a special welding machine or installed using fittings.

Conclusion

Replacing plastic pipes with your own hands is quite possible and not particularly difficult. First you need to compose detailed plan actions - and half of the work can already be considered completed. The implementation of the plan will be the second part of the work, and after its successful completion, the only thing left to do is rejoice at the upgraded pipeline.

There is nothing eternal! And if there is, it may cease to suit. So it is with communications. The owners sometimes have a desire to update the network in whole or in part. There can be a lot of reasons for this - from an elementary leak to a change in design.

Let's figure out how to replace pipes with plastic ones with your own hands.

Plastic is the most sought after material today.

Introduction to plastic pipes

What are the advantages of the material and are there any disadvantages? How to make sure it's done optimal choice? About everything in order.

Advantages and disadvantages

Why is replacing metal pipes with plastic ones a wise decision? The secret is in the special properties of this material.

Among the advantages are:

service life (up to 100 years, depending on the type of structure);
lightness of the material;
resistance to corrosion;
ease of installation;
strength;
noiselessness during network operation;
elasticity;
environmental friendliness (the chemical composition of the liquid moving through the system does not change);
low thermal conductivity;
versatility of the gasket (the material can be mounted both open and closed);
ease of transportation;
moderation in price.

Pluses - a lot. Plastic is the most optimal material among its "brothers". Networks from it serve for a long time and do not cause trouble for the owners, of course, if the replacement of plastic pipes in the apartment was done correctly.

There are few disadvantages - just a few:

restrictions on the temperature of transported substances (depending on the type of structure);
selection of installation technology (they also vary and depend on the type of material);
compatibility in composition (control that liquids that can corrode plastic are not transported through the network).

See how neat the metal-plastic heating system looks

Types of plastic structures

Let's consider how to replace the old ones with plastic pipes so that the minuses do not appear. In the process of manufacturing products, other substances are added to plastic, so you can find the following markings on purchased items:

MP - metal-plastic. It is said that this "duo" of components is ideal for honing home skills. The material does not fail either in the cold (it withstands frost very well), or when transporting liquids with high temperatures (up to 900 degrees). The only negative is the sensitivity to external deformation. Bend such elements carefully.
PE or polyethylene. The main advantage of such a composition is that you can work with it even at low temperatures, that is, even when it is -20˚ outside the window, you can carry out work on laying a network of polyethylene or repair already installed communications. The main thing is to choose the right pressure threshold - low or high.
PES, which means cross-linked polyethylene. Such material is used both for laying water supply lines and for heating networks. Why "stitched"? It's just that the pressure treatment technology that aims to increase the resistance threshold to temperature changes and increase stability is called "crosslinking". Elements are treated with nitrogen, silane gas, peroxide method or electron beam irradiation.

It looks like cross-linked polyethylene

PVC or polyvinyl chloride. If you see such a marking, do not buy the product if you plan to install a network for domestic use, since chloride is present in the composition. Such material is suitable for arranging swimming pools, chemical plants, but not for the home.
PP - polypropylene. This material is suitable for bringing water to housing. Thanks to a special device (3 layers - protective, plastic itself and foil), the products are resistant to temperature changes, they can successfully transport liquids that reach temperatures of more than 1000 degrees. However, there are also disadvantages: low elasticity (products do not bend well), the impossibility of replacing elements (welding is used “forever”, therefore replacing a damaged section of a plastic pipe is impossible in this case).

And this is polypropylene.

Replacement technology

It's time to move on to practice. Consider how the replacement of metal-plastic pipes takes place.

Due to its lightness and plasticity, it is a pleasure to mount plastic

Work order

Planning everything right is half the battle. Preparatory stage no less important than repair work. If you have decided on the material, then proceed according to the following scenario:

Draw a plan or a drawing of what exactly you are changing and how you are going to do it.
Calculate how much material is required for the work.
Purchase pipes and fittings.
Find tools and devices for connecting products.
Turn off the water.
Dismantle the old network fragment.
Install plastic parts.
Check system performance.
Get rid of trash.
Enjoy the result.

Photo tip - an example of wiring a bathroom in an apartment

Dismantling of old elements

Do-it-yourself replacement of pipes with metal-plastic pipes begins with destruction. Dismantling can differ only in technology and the number of tools involved. Breaking is not building, so you can figure out how to remove failed network fragments yourself. Somewhere it’s really possible to unscrew it, and in other places you will have to use a grinder to cut it off.

For work, get the following tools:

hammer with a wooden or rubber nozzle;
Bulgarian;
perforator;
chisel;
grinding discs;
screwdrivers;
wrenches.

Worth paying attention! Try to combine pipe replacement and repair, then you can hide the new network in the walls.

This is what the wall looks like after changing steel to plastic

Plastic installation

Once the old items are unmounted, you have two options:

install new ones in their place - plastic fragments;
lay the network differently - according to the new plan.

Compound plastic products depends on their composition. The technology of welding with a construction soldering iron / welding machine can be applied or chemical composition, either with fittings or gaskets and bolts. Focus on the type of plastic pipes you prefer.

If you want to "drown" the network in the walls, you will have to make strobes before installation. Do not forget about the insulation of the elements. Turn on the water only when the products turn into complete system.

Video: do-it-yourself replacement of pipes with metal-plastic

Plastic is called modern building "plasticine", and you, since you install pipes from such material, can be called a creator. Dare!