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Which plastic sewer pipes for the street are needed. Sewer pipes: types and applications

The drainage system is not limited to internal communications. And if for the owner of an apartment in a multi-storey building only internal pipelines are the subject of care, then the owner of an individual home has to take care of external communications. Their reliability and durability directly depend on what sewerage pipes for outdoor sewage are chosen. There can be several options. Let's consider each of them in more detail.

What should be the pipes for the outdoor system?

External pipelines have to work in difficult conditions, which is why they are subject to increased demands. The material from which they are made must be:

strong;
resistant to a variety of corrosive environments;
capable of transferring seasonal temperature changes without prejudice to their properties;
resistant to wear.

These requirements are met by various types of plastics, steel, cast iron, asbestos cement and ceramics. Of these materials, pipes for outdoor systems are most often made. When choosing such details, it should be remembered that they should:

to withstand the weight of the backfill and the load from possible movements of people and vehicles over them;
resist static and dynamic effects;
to resist the impact of groundwater, provoking displacements within the docking nodes and, as a result, depressurization of the system.

When selecting pipes, it should also be remembered that the reliability of the system is affected not only by the quality of the material of the parts, but also by the literacy of their installation. If it is too complicated or involves some difficulties, it may be worth considering another type of pipe.

What can I choose from?

Pipes suitable for the arrangement of external sewage pipelines are quite numerous. If desired, you can perform it even from glass parts. However, it is rather exotic. Consider the most popular options among developers.

Option # 1 - parts from asbestos cement

For the production of products a mixture of asbestos fiber with Portland cement is used. Advantages of such pipes are:

Durability. The system of asbestos-cement can last from 50 to 100 years.
Resistant to aggressive environments. Almost any liquid can be discharged through such pipes.
Light weight, which greatly facilitates their installation.
Stability of the tube to the "overgrowth" of the internal lumen.
Ease of installation. Crop and dock the elements without using a special tool.

The disadvantages include the fragility of the material, which is very unstable to mechanical damage. When purchasing such products, you should closely inspect the ends of the pipes. This is where the chips and cracks appear most often. In addition, they need to be transported very carefully.

Asbestos-cement pipes are very fragile. Before installation, they must be carefully inspected. Most often, cracks and chips are formed near the end of the parts

Option # 2 - ceramic products

Ceramics as a material for the production of pipes for sewage used in antiquity. And until now, such products are quite popular. The reason lies in the large number of advantages of ceramic parts:

Chemical inertness, which makes it possible to transport almost any liquid through such pipes.
A small roughness of the inner surface, which prevents the appearance of outgrowths and clogging of parts.
Resistance to the temperatures of the transported liquid and the external environment.
Simple installation.

The disadvantage of ceramics is its fragility, so you have to take special care when transporting it and installing it. In addition, the length of such products is small, which significantly increases the number of joints in the system. On sale it is possible to find ceramic pipes in diameter from 100 and up to 600 mm in two variants of connection: with a cutting and a bell.

Before installing ceramic pipes, they must be checked for their quality. For this, every detail is inspected and taped. The appearance of a rattling sound is considered a testament to the presence of cracks.

Option # 3 - cast iron sewer pipes

Spigot cast-iron pipes are a traditional solution for sanitation facilities. For private construction, the most frequently used part is a 160 mm diameter. Cast iron pipes have many advantages:

High strength, allowing products to withstand significant loads.
Durability. Cast iron pipelines can be used for decades.
High corrosion resistance and insensitivity to most aggressive environments.
Resistance to temperature changes.
Simple installation, performed by the trumpet method, is quite simple.

A serious "minus" of such a material is its heavy weight. In this regard, installation of a pig-iron pipeline without special equipment is impossible. The internal surfaces of the cast iron products are rough, the deposits easily form on it, which, over time, leads to the formation of blockages and the "overgrowth" of the pipe. In addition, the material has limitations on use. It is very sensitive to saline solutions, therefore it is impossible to use cast iron in solonchak soil.

Cast iron is a traditional material for sewer pipes. Its main disadvantage is its high weight, which requires the use of special equipment when installing the system

Option # 4 - a pipeline of PVC

PVC is an affordable and therefore very popular polymer. The pipes made for it for outdoor sewerage are distinguished by multiple "pluses":

Smooth walls, preventing the formation of internal growths.
High enough strength.
Frost resistance. Pipes do not crack even in case of complete freezing.
Light weight, which allows you to carry out the installation without the use of special equipment.
Ease of installation.
Resistance to corrosion and some aggressive environments.
Low cost.
High wear resistance. Pipes do not lose their properties even when transporting liquid with a lot of sand.

The main drawback, limiting the use of PVC products, is a significant temperature elongation of the material. Therefore, such pipes are not installed in areas where the transportation of liquid is required, the temperature of which exceeds 60 ° C.

The characteristics of such products may vary significantly depending on the version. To date, PVC pipes are available in two types: one and three-layer. In the latter embodiment, the inner layers are made of expanded plastic, and the outer layers are made of unplasticized material. There are also details on the stiffness class. Issued by:

Rigid pipes, class S. Designed for laying to a depth of up to 8 m, differ by the maximum wall thickness.
Medium-weight products, class N. They can be laid to a depth of 2 to 6 m.
Light elements, class L. They are used for equipping pipelines laid to a depth of 0.8 to 2 m.

As a rule, when installing PVC pipes, the connection is used in the socket. This is an extremely simple operation that does not require special equipment and skills. In some cases, an adhesive method or so-called cold welding is used.

Pipes made of polyvinyl chloride have a limitation on their use. They can not be stacked in systems where the temperature of the transported liquid exceeds 60 ° C

Option # 5 - products from polypropylene

Polypropylene pipes are optimally suited for the arrangement of external sewerage pipelines for residential buildings and non-pressure drainage sewer systems. Among their numerous advantages are:

Resistance to temperature effects. The upper limit of permissible temperatures is at the level of 95 ° C. Cold material carries as well as heat and does not lose its qualities.
Chemical inertness. Polypropylene does not corrode and does not emit toxic substances.
Smooth surface inside the parts, which do not settle particles of deposits. Clogs in such sewerage occur only in the case of an incorrect device of the system.
Long service life. The manufacturer guarantees that polypropylene pipes will last at least 50 years with proper operation.
Light weight, giving advantages when installing and transporting.
Ease of installation. Low weight, elasticity and special connecting sockets allow the installation to be carried out very quickly and without the use of special equipment.

The range of polypropylene pipes is very wide, which allows finding details for the system of any complexity and configuration.

Polyethylene sewer pipes are sensitive to ultraviolet radiation. They need to be stacked so that the surface of the pipeline is sheltered from direct sunlight

Option # 6 - polyethylene pipes

Another type of plastic products, widely used for the arrangement of outdoor sewage systems. Advantages of such pipes are:

Durability. The service life of such products is estimated in tens of years.
Resistance to temperature changes. The working range of the material is in the range from -20C to + 60C. For a short time, polyethylene can withstand the action of a liquid heated to 100 ° C.
Simple installation, carried out without the use of special tools and equipment.
Smooth inner surface, preventing sedimentation of deposits that cover the lumen of the pipe.

The disadvantage of polyethylene is its sensitivity to UV radiation. Such pipes can only be used provided that sunlight does not fall on them.

Corrugated sewer pipes are produced in two layers. The outer corrugated layer imparts rigidity to the product. Internal smooth - allows you to transport drains without disturbance

With all its advantages, plastic pipes are not very strong. To level this defect they make corrugated. Such products are made from low-density polyethylene or polyvinyl chloride. They have two layers. External - corrugated, providing details of increased rigidity. The inner layer is smooth, making it possible to transport the drains without hindrance. The corrugated pipes are joined to the socket using special rubber cuffs or by means of "cold welding".

What pipes for outdoor sewage are modern industries? There are two main types:

Cast-iron;
Plastic.

Each of them has both advantages and disadvantages, so it makes sense to fully understand their characteristics and understand what kind of all the same is better.

Cast-iron

Usually this species is not used for outdoor sewerage. The fact is that they are softer and do not withstand the load from the soil layer poured on them. They crumble, change their shape, which can lead to the formation of clog due to the narrowing of the diameter. In addition, they do not disdain rodents. Although polypropylene pipes can be used in sandy soils.

But they have a high index of heat resistance, they can easily pass material with a temperature of + 800C. They practically do not burn. Still, experts recommend that they be used exclusively to create internal sewerage networks.

Today, manufacturers offer a corrugated version of polypropylene pipes. This worthy alternative has been recognized by industrial enterprises, where there is a need to run high-temperature materials or hot sewage through pipelines.

Polyethylene corrugated

Polyethylene corrugated double-layer

This is an ideal outdoor sewage pipe. Corrugated polyethylene is very widely used for erection of sewerage of various capacities, sizes and schemes.

The peculiarity of such pipes is, first, the fact that polyethylene has increased strength. And, secondly, the corrugated structure increases the initial strength a few times.

This all gives a guarantee that this type of pipe will withstand a fairly large load. Therefore, you can lay them down to a depth of 15 meters. Traditionally, manufacturers produce two dimensional species. This is 200 mm and 800 mm. The corrugated structure is located outside, but inside it is an ordinary smooth pipe through which the drains pass unhindered towards their collection.

Conclusion

So, let's summarize. Cast iron pipes are discarded immediately, because this is the last century. From plastic pipes we choose either polyvinylchloride or polyethylene. But the latter are more expensive, and you will have to take into account the allocated amount of money. Although, according to experts, PVC pipes - this is an ideal option for creating a suburban area of external sewerage.

Owners of private housing have to think over not only internal communications, but also a system of diversion outside the house. For this purpose sewer pipes for external sewerage are designed, for which different materials are used.

External sewage networks have to function in difficult conditions. Earth-filled pipes are forced to carry the weight of the ground, which people can move around, and often cars. Also they are affected by soil water, capable of provoking displacement of the docking assemblies, which can lead to depressurization of the sewerage network.

Systems have to constantly resist the static / dynamic effects of sewage, which are transported through pipes.

The external sewerage pipes used for the installation of sewage disposal systems have to be underground in difficult conditions

That is why special requirements are imposed on elements of external sewage networks. Pipes should have the following qualities:

strength and rigidity;
ability to withstand temperature fluctuations, without losing working qualities;
frost resistance;
wear resistance, long service life;
resistance to the influence of aggressive chemical environments.

For the manufacture of external sewage systems, various materials (polymers, steel, cast iron) can be used, but all of them must correspond to the above factors. It should also be taken into account that the quality of the pipeline is affected not only by the specific properties of the pipes, but also by the quality of installation and installation of the system.

Differences between external and internal sewerage

Pipes used for laying external systems are significantly different from those used for intra-house communications.

External sewage systems differ from internal pipes in bright orange color, as well as increased density and wall thicknesses

Characteristic features include:

Orange (red) color, which facilitates easy detection of the pipe, therefore, helps to avoid unintentional damage to the network during the earthworks.
The wall thickness of the part for external sewerage is always higher than for internal sewerage (when using PVC systems, these figures are 3.2-3.4 mm vs. 2 mm), since the pipeline laid under the ground has to bear heavy loads.
Red pipes are usually made of materials of increased resistance (for example, unplasticized PVC, which is particularly strong).
Due to the increased thickness and reliability of the walls, as well as the addition of specially selected components, the heat resistance of outdoor systems is higher than internal.
Products of orange color, as a rule, serve a longer period than gray.
The cost of elements for external sewerage is about 20% higher than for internal sewerage.

Experts warn about the inadmissibility of using gray pipes for laying external sewerage. It is difficult for them to withstand the increased load (especially for a long time), which can lead to breakthroughs and accidents.

Let us consider in more detail which materials can be used for the manufacture of external sewage systems.

Varieties of plastic products

Sewer polymer pipes appeared not too long ago, but they became widespread, having pressed traditional analogues in the profile market. Such components have a number of undeniable advantages:

light weight, facilitating transportation, storage, laying;
smooth internal surface, facilitating unhindered passage of waste water and not allowing subsidence of salts and other deposits. Due to this feature, when properly installed and used in plastic pipes, clogs are almost never formed;
plastic pipes do not rot, do not undergo corrosion;
similar products have sufficient life, although less than their cast-iron counterparts (maximum 50 years).

The most frequently used components for making external sewage systems are made of the following materials.

Option # 1: pipes made of polyvinyl chloride (PVC)

Polyvinyl chloride (PVC) is an affordable popular plastic, widely used for the manufacture of various products, including pipes for internal / external networks. Such components are particularly recommended for sewage systems that require a large throughput (collector, culvert, stormwater).

PVC pipes are widely used for laying external sewerage networks, however they are sensitive to aggressive chemicals and liquids having a temperature above 60 degrees

Pipes made of polyvinyl chloride have the following positive properties:

good resistance to mechanical influences;
high strength;
resistant to ultraviolet, so that such products are suitable for open areas.

Among the most significant shortcomings of PVC pipes are:

Sensitivity to aggressive materials. If it is planned to remove acids and oils through such components, it is better to purchase special NPVC pipes, which have special properties.
Temperature elongation of the material. Because of this property, such parts are inexpedient to install for transportation of hot liquids (over 60 degrees C).

There are two types of PVC pipes:

Pressure head that withstand high pressure (<10 атмосфер). Они применяются в системах, испытывающих постоянное повышенное воздействие различных сред.
Non-pressure. Recommended for systems with unintended high pressure (the liquid in the pipe moves by gravity at a moderate speed).

Most often, the second version of products is used in external pipelines.

Polyvinyl chloride pipes can consist of one or two layers. In the latter case, the unplasticized material is used for the outer layer, and for the internal processed foam polymer.

The connection of polyvinylchloride pipes is usually made by means of funnels. In some cases, cold welding and glueing

In terms of stiffness, PVC components differ in the following categories:

Rigid pipes (class S) with a maximum wall thickness, designed for installation at a depth of up to 8 meters. This kind can be used for any work, however it is most often used in industry.
Medium-weight products (class N) are used at a depth of 2-6 meters. They are suitable for mounting the pipeline under not too busy roads.
Light components (class L), sufficient to create systems that are laid at a shallow depth (0.8-2 m). Not suitable for laying under the carriageway.

The most common pipe for external sewage is a product with a diameter of 10-11 cm. In this case sewage from a country house is easily transported through the network.

Option # 2: polypropylene products

Pipes of this type are not too often used for laying external sewer networks because of insufficient rigidity of polypropylene parts. However, they can be used for laying a pressureless storm sewage system or for installing systems in sandy soils.

Among the advantages of this type of products:

High heat resistance. Padded systems withstand the transport of hot liquids (up to 80, and occasionally up to 95 degrees Celsius).
Chemical inertness. The plastic does not corrode, does not emit harmful substances.

In addition to the already mentioned insufficient density, the disadvantages of polypropylene include its sensitivity to ultraviolet. When storing and laying pipes made of such material, it is important to avoid direct sun rays.

Option # 3: polyethylene pipes

Such material is widely used for the installation of external pressure pipelines. The advantages of PE pipes include:

ability to withstand hydrostatic shock;
resistance to active substances;
long life (50 years or more).

Among the shortcomings of such products are:

insufficient thermal resistance (polyethylene pipes can be used in the temperature range from -40 to +40 degrees Celsius);
susceptibility to ultraviolet.

Option # 4: corrugated products

The common minus of plastic sewage elements is their insufficient strength. To correct this flaw, a special design was invented-a corrugated pipe with more mechanical stiffness.

Due to the folded outer surface of similar products, their area increases. This makes it possible to redistribute the pressure exerted by the ground, as a result of which the pipelines withstand increased loads.

Corrugated structures are very popular. They allow to improve the stiffness and density of plastic pipes, while maintaining a light weight of products

There are two types of corrugated pipes:

Single-ply, with a unique ribbed surface inside and out. Such material is relatively cheap, but draining is much worse.
Two-layer pipes having a folded outer surface and a smooth inner. Thanks to this, the flow freely passes through the pipe, without forming deposits and clogs.

Similar products can be made from different types of polymers. The most commonly used is low pressure polyethylene, polyvinyl chloride.

The diagram shows the arrangement of a double-ply corrugated pipe used for the installation of external sewerage. The part consists of an outer folded layer and a smooth inner surface

Pipes with a corrugated surface are connected by the socket method using special rubber cuffs. When installing pipelines, it is also possible to apply the method of cold welding.

Sewerage products of other materials

In addition to plastic, external pipes for sewerage can be made from other materials.

To produce similar products, a mixture of Portland cement with mineral asbestos fiber is used. Such systems have a number of important advantages:

Durability: the service life can reach half a century and even a hundred years.
Relative ease, greatly facilitating installation.
Resistant to aggressive environments. Pipes made of asbestos cement can withstand almost all chemicals.
Non-disposition to the overgrowth of the socket.

The disadvantage of this material is its fragility and sensitivity to mechanical damage.

When buying asbestos-cement products, you need to carefully inspect them to reveal chips and cracks - an already fragile material with the marriage will not endure the necessary load

When making a purchase, it is important to carefully inspect the ends of the pipes, where the most frequent damage is observed. When transporting and storing products from asbestos cement, it is important to observe special care.

Ceramic products

Even in ancient times, ceramics were used for the manufacture of parts of the sewage system. This material is popular in our days, thanks to such advantages as:

Chemical inertness. Ceramic systems allow transportation of almost any liquid media.
A special structure of the inner surface, which prevents the formation of deposits and deposits of salts and other substances.
Resistance to ambient temperatures and liquids passing through the pipe.
Easy laying.

Among the shortcomings can be noted:

Friability. Pipes made of ceramics are easily destroyed under mechanical influences; therefore, special precautions must be taken when transporting, storing and installing them.
The small length of the pipes, because of which when laying the system it is necessary to increase the number of joints.

On sale there are ceramic elements in diameter of 100-600 mm, which can have two variants of connection: with a socket and with cutting.

Before installing the pipes, you should check the quality, inspecting the appearance of the parts and rattling them. The rattling sound that appeared when it strikes testifies to the presence of a hidden crack.

Cast iron systems

For a long time the most popular solution for outfitting sewerage systems was considered to be cast iron pipe fittings. As a rule, for private construction there are enough elements with a diameter of 16 cm.

The main disadvantage of traditional cast-iron pipes is a large weight, because of which for the laying of communication networks requires the use of special equipment

Systems of this material have many positive qualities:

High strength, allowing the pipeline to withstand heavy loads.
Durability. The service life of cast iron systems is at least several decades.
Resistance to temperature changes.
A simple installation is sufficient, which involves the use of the belling method.

At the same time, we can not fail to mention some of the shortcomings of such products:

Great weight. Because of the gravity of the elements, it is impossible to lay a cast iron pipeline without the use of special equipment.
The tendency to build up deposits on the surface: over time this can lead to the formation of blockages.
Inability to use on a number of soils, especially in salt marshes.
A fairly high price for traditional cast iron products.

At present, cast-iron pipes are used for building industrial communications, whereas in individual construction they were almost everywhere replaced by cheaper and lighter plastic analogues.

Sewer pipe manufacturers

The release of pipes of various materials used for laying external sewerage is handled by many foreign and domestic firms.

Companies specializing in plastic products

Among the companies that produce plastic products, we can note the following.

Wavin. The company, founded in Holland in 1955, specializes in the production of sewer and water pipe plastic pipes. The company's products are extremely demanded throughout Europe.

The Dutch company Wavin is well known in European countries. The company offers a wide range of pipes and fittings for external sewerage

For outdoor works, the manufacturer produces corrugated polypropylene pipes "Pragma", which have double walls, as well as other production options.

The components of Pragma are 6 meters long; they are easily connected to the system, because they have a bell in one end and a rubber seal on the other. The manufacturer recommends the use of these products to create a network of external gravity sewers.

POLYPLASTIC. An international company, whose divisions are located on the territory of the CIS countries (Russia, Kazakhstan, Belarus).

Among the assortment of branded products, various kinds of sewer elements occupy a large place, including external pipes made of different types of polymers (polyethylene, PAH, polypropylene, fiberglass).

For the products produced by the company, an optimal combination of a small weight with increased ring stiffness is characteristic, so that plastic pipes successfully resist even considerable loads.

Armored products "Corsis Arm", included in the range of the company POLYPLASTIC, have a steel layer, reinforcing the rigidity of external sewer pipes

The brand-name line of this manufacturer is the "Corsis" series, which includes:

double-layer corrugated products;
spiral-shaped parts;
multilayered reinforced pipes.

All these elements are perfect for laying external sewage networks, other systems of water disposal. The company produces products with a length of 600 or 1200 mm, with a diameter of 110-600 mm. Unlike the products of other companies, the components of "Corse" have a corrugated black outer layer and the inner surface of light-blue, yellow or orange colors.

Ostendorf. The famous German company Ostendorf Kunststoffe, specializing in polymer pipes and other parts, was founded by the brothers Ostendorf in 1973. Now the company is considered the leading manufacturer of elements of similar systems in the profile market. Deliveries of products are made in many countries of the world, but Germany is the main consumer.

Pipes KG (manufactured by the German company Ostendorf) have high consumer qualities. Such systems are durable, reliable, durable, easy to operate

In 2011, Ostendorf started operating in Russia. At the enterprise, where the latest technological equipment manufactured in Germany is installed, imported raw materials and components are used. At the factory, strict quality control is organized, which is carried out in accordance with German and Russian regulations.

Because of the highest quality of products, it enjoys an increased demand of consumers, despite the relatively high cost.

The KG line, designed for outdoor sewage, is made of solid polyvinyl chloride without impurities, which has increased strength, water resistance, durability, and thermal conductivity. The convenient shape of the ends allows quick and easy installation of various systems.

POLITECH. The Russian company "Politec", founded in 1999, is the leader in the production of polymer products used for drainage, water supply, sewerage.

The products of the domestic company Politek became popular due to the optimal ratio of quality and price. Even budgetary products have decent characteristics

At the company's factories, the latest foreign special equipment is installed, which allows the production of European-class products.

Companies manufacturing cast iron pipes

Although metal products are now less common than plastic products, the demand for cast-iron pipes can be called stable. Such products are produced by several European companies, among which the following can be noted.

Duker. Founded in 1913 in Karlstadt (Franconia, Germany), the company initially produced products with socket systems. In 1968, innovative no-trumpet pipes were developed, allowing shortening of parts, as well as mounting the remaining trims, using a combination method.

Now the company is the only producer of sewage systems made of cast iron in Germany, while the factory has a completely completed production cycle: from casting to application of external coating.

The company offers the widest range of different systems having different lengths, diameters and connections. All of them have excellent consumer qualities: durability, resistance to aggressive substances, strength.

Pam Global. The large concern Saint-Gobain (France) specializes in the production of modern cast-iron products. To produce them, De Lavo technology (centrifugal casting) is used, followed by deep cooling of the structures.

Cast iron Pam Global pipes are produced in the factories of a large French concern. In the manufacture of products, the metal is coated with epoxy resin, zinc powder and acrylic lacquer

Pam Global C systems are specially designed for ground works, as well as the installation of quality long-term drainage systems. External sewer pipes have a diameter of 100-200 mm.

It is impossible to say unambiguously which type of pipe is the best. When considering product variants, it is important to know for what purpose they are intended and under what conditions they will be used. Only taking into account all the individual features of the site, the owner can choose which option is best for the arrangement of the sewage system.

Pipes made of black steel are economical, durable, easy to process and withstand the highest possible temperature. They can be used in the production of waste oil and chemical liquids having a wide temperature range. In everyday life it is not possible to use sewer pipes made of black steel because of their high weight and susceptibility to corrosion.

Cast iron pipes are particularly strong.

Cast iron is less prone to corrosion, but also costs more than steel. From it, sewer risers and external terminals are installed in the collector, and this material should be chosen for laying external sewerage. It is the most durable, having an indefinite life of the target material. For high-temperature sewage, it is best to use cast-iron sewage pipes. Of the shortcomings of this material, it should be noted its great weight; complexity during installation (special materials and skills are needed for hermetic connection); also a disadvantage is that, due to the natural roughness, mud builds up on the inner walls, which reduces the permeability of the drains.

Polymer sewer pipes

Polymer sewer pipes are used in modern construction most often, they can be chosen not only for internal, but also for external sewerage, both for non-pressure and pressure.

polyvinylchloride (PVC);
unplasticized polyvinyl chloride (PVC-np);
polypropylene (PP).

PVC is most often used for systems where effluent flows by gravity. These pipes have a low coefficient of surface expansion, are durable, resistant to ultraviolet radiation. Their shortcomings: at high temperatures (from 70 degrees) are deformed; at low temperatures become brittle, lose elasticity; Destroy under the influence of aggressive organic media, in the event of fire, releases a toxic gas phosgene. It follows that PVC is not recommended for internal sewerage. It is recommended for risers, underground and above-ground external sewerage with a heater and only for a drift.

Corrugated pipes for local sewerage from polyethylene.

PVC-np is more versatile. This material is used for internal and external sewerage in non-pressure and pressure systems. Can be used for cold water supply. The disadvantages are also a small temperature range and flammability. The application is similar to PVC pipes, and, in addition, it is recommended to use it in an external sewage pressure loop (fecal pump, etc.)

The most durable is the sewerage from the PP. When observing the rules of operation, it can last at least 100 years. It is easy to install, has high heat resistance, withstand high temperatures. Great for domestic sewage. Recommended for indoor use, but not recommended for external sewerage systems. A common advantage for all polymer pipes is that the material perfectly repels passing drains without causing them to adhere to the inner walls. It should also be noted their simple installation. The connection is made by butt welding (without an open flame) or by crimping. From the temperature difference of the polymer tubes "walk", therefore, during installation, leave space for them so that they do not break the tight fitting trim. Such pipes can be conveniently hidden under a gypsum board, lining it with tiles.

So, let's summarize: what material for which type of sewage is better to choose? For internal sewer wiring, polypropylene is best suited; for external wiring, risers and underground sewerage communications - PVC, PVC-np, cast iron. A feature of the sewage system made of polymeric materials is that it is very rarely clogged, but if this happens, you can not use a metal cable to clean it, it will easily damage the internal surface, forming burrs on it, for which dirt will again cling. For the cleaning of sewerage from polymeric pipes use special chemical means intended for this purpose, or a cable with a nonmetallic tip.