Most of the communications that are laid inside buildings today are made from polymer materials. Plastic sewer pipes are characterized by high throughput, corrosion resistance, aggressive environments and water hammer, as well as low weight, low level noise, absence of deposits and condensation. The service life of the products is at least 50 years.

Communications made of polymer materials are relatively easy to install using trenchless technology, without the use of special tools. No cement mortar is required for installation.

Types of plastic sewer pipes

• Polyvinyl chloride - used in external systems. PVC sewer pipes are resistant to sudden temperature changes and are used only for wastewater that is not hotter than 70 °C. They are highly flexible, so they can fit into hard to reach places. Strength classification: SN2 - light, SN4 - medium, SN8 - heavy. The use of PVC pipes for sewerage with aggressive chemical waste is not allowed.
• Polyethylene - used in internal and external pressure-type communications. Pipes are used in temperature range from –40 to 40 °C and are not intended for hot wastewater.
• Polypropylene - intended for internal systems. The communications are resistant to household acids and alkalis and can withstand wastewater temperatures of up to 100 °C. Corrugated versions are used for external installation.

Installation of pipelines is carried out using fittings. They are used for turning, docking, and retraction devices. Our catalog includes models for creating communications of various lengths and configurations. The price is largely determined by the size of the products.

Every owner wants everything in his household to work, nothing to break, and to be easy to maintain and install. And sewerage is no exception. It needs to require as little attention as possible - it’s very inconvenient if it gets clogged, but it’s no less unpleasant to clean it. If you want to have a trouble-free wastewater disposal system, pay attention to plastic pipes for sewerage. They are gradually replacing cast iron ones, and all because they cost less, are easier to install, have a wide range - different diameters and lengths, almost no deposits form on their smooth walls, and even have a service life of about 50 years. This whole bouquet of properties determines their popularity.

Types of plastic sewer pipes

• polyethylene (PE):
  • high pressure (HPP) - for internal wiring sewerage;
  • low pressure (LDPE) - can be laid outside, in trenches (they have greater strength);
• polyvinyl chloride (PVC);
• polypropylene (PP)

And further whole line other thermoplastics and their combinations, but they are rare - people prefer to use already known materials.

The material of plastic sewer pipes is selected depending on the application. For example, polypropylene is more suitable for installing sewerage inside a house or apartment. It has a higher operating temperature range - it normally tolerates environments up to 70°C, and for a short time - up to 95°C. If there are different household appliances, discharging waste hot water into the sewer, it will not be superfluous. PVC pipes having more than low prices, are more appropriate when laying external sewerage - here the drains are usually already mixed, so the temperatures are lower and PVC can withstand them without harm (working up to +40°C, short-term increase to 60°C).

Sewer pipes can also be smooth or corrugated. Moreover, not only siphon bends can be corrugated. There are profiled pipes for sewerage with an internal smooth wall and an external ribbed one. They have greater strength - they can better withstand compressive loads (they have increased ring rigidity) and can be buried to great depths. Available in diameters from 110 mm to 1200 mm.

Dimensions and diameters

Sewage plastic pipes, unlike water and gas pipes, are produced in the form of lengths of 50 cm, 100 cm, 200 cm, etc. - up to 600 cm. Maximum length- 12 meters, but some manufacturers can make longer sections upon request. When laying long routes, this is convenient - there are fewer connections, fewer possible places for problems to arise (leaks or blockages).

More important characteristics plastic pipes - diameter and wall thickness. In the markings they usually go side by side: the numbers are 160 * 4.2. What does it stand for: outside diameter pipes 160 mm, wall thickness 4.2 mm. It’s worth remembering here that manufacturers indicate the outer diameter of plastic pipes, and many calculations and planning require knowing the inner one. It is easy to calculate: subtract twice the wall thickness from the outer wall: 160 mm - 4.2 mm * 2 = 151.6 mm. Calculations and tables usually show a rounded result—in this case, 150 mm.

In general, the industry produces plastic pipes for sewerage with a diameter of 25 mm. The maximum cross-section depends on the type of pipe (smooth or corrugated) and the material from which it is made. For example, smooth PVC sewer pipes can have a diameter of up to 630 mm, and profiled two-layer pipes can have a diameter of up to 1200 mm. But these dimensions are of no use to homeowners or apartment dwellers. In private housing construction, diameters up to 100-110 mm are mainly used, rarely up to 160 mm. Sometimes, for a large cottage with a large number of plumbing fixtures, a pipe of 200-250 mm in diameter may be needed.

How to choose a diameter for connecting plumbing fixtures

According to the rules, a calculation must be made; it is fully spelled out in SNiP 2.04.01085. This is a complex matter, a lot of data is required, so few people really think as it should. Over the years, accumulated practice has made it possible to derive the average diameters of polyethylene sewer pipes for each of the plumbing fixtures. You can safely use these developments - all calculations usually come down to these dimensions.

Name of plumbing fixture	Diameter of plastic sewer pipe	Slope	Distance between central drain and siphon
Bath	40 mm	1:30	100-130 cm
Shower	40 mm	1:48	150-170 cm
Toilet	100 mm	1:20	up to 600 cm
Sink	40 mm	1:12	from 0 to 80 cm
Bidet	30-40 mm	1:20	70-100 cm
Kitchen sink	30-40 mm	1:36	130-150 cm
Combined drain - bath, sink, shower	50 mm	1:48	170-230 cm
Central riser	100-110 mm
Bends from the central riser	65-75 cm

As you can see, plastic pipes for sewerage with a diameter of 30-40 mm are mainly used. Only the toilet requires a much larger size - 100-110 mm. This is due to the peculiarity of its functioning - it is necessary to take a large number of water. At the same time, there must be room for air in the pipe, otherwise it will break the water seals on other plumbing fixtures and “aromas” from the sewer will enter the room.

When installing, you need to remember a few more rules:

You also need to remember about insulating or heating the sewer outlet in a private house. The vertical section that runs from the outlet to the entrance to the trench must be well insulated. Additionally, they are often used. In the case of sewers, they are usually laid outside and then covered with thermal insulation material.

That's it, that's it. The rules are simple, but if you follow them, everything will work for a long time and without failure.

Features of installation of plastic sewer pipes

Plastic pipes for sewerage on one side end with a socket into which a sealing rubber. The segments are connected simply: a straight edge is inserted into the socket. Since the dimensions are strictly standardized, this is, in principle, sufficient for a hermetically sealed connection. In practice, the O-ring is often additionally coated with silicone plumbing sealant.

When installing sewer plastic pipes, sometimes they have to be cut. Convenient to do with hand saw with a blade for metal - small teeth cut well and leave an almost even edge. You can also use a grinder or jigsaw. In any case, before installing the cut piece, its edge must be treated with fine-grain sandpaper to remove possible burrs and make it smooth. Some piece of waste may get caught on the protruding pieces, and as a result, a blockage may form in this place. Therefore, we carefully smooth out the cut area.

While creating sewer network in a house or apartment it is often necessary to make a branch. There are fittings for this - adapters from one diameter to another, tees, angles with different degrees of rotation, etc.

The wastewater disposal system necessarily consists of special sewer pipes that can be used directly for external networks. The reliability and durability of the future system will depend on them. It is important to choose the right required material. On modern stage For sewer works Cast iron, polyethylene, ceramic and external PVC pipes are used. The latter option is used quite often due to their high quality and durability.

External PVC pipes must have the following qualities:

• High strength;
• Significant wear resistance and pronounced durability;
• Resistance to aggressive chemical and physical factors;
• Ability to withstand large temperature differences (no deformation or cracking).

However, we should not forget that pipes High Quality will not serve perfectly if there are installation errors. Therefore, in addition to a competent and qualified choice, it is necessary to install them efficiently and accurately. External PVC pipes are mounted using the socket method using rubber cuffs which provide maximum tightness. Externally, external PVC pipes differ from internal ones in color - external pipes are red in color.

PVC pipes for external sewerage

Due to their basic qualities, PVC pipes for external sewerage are widely used for the improvement of new lines, and for replacing worn and damaged areas in old systems. They can be used for any type Wastewater(domestic, industrial and sedimentary). In this case, their maximum temperature should not exceed 60 degrees. Polyvinyl chloride pipes are lightweight, which allows them to be quickly and easily installed without the use of additional skills and special set tools.

PVC pipes for external sewerage are resistant to corrosion and the formation of sediment on internal surfaces. Wastewater containing sand or small stones will not damage the pipe walls at all, which indicates their high wear resistance. Therefore, they are often used in industrial wastewater. For different loads, types of pipes corresponding in rigidity are used, which are represented by classes SN4 and SN8. Pipes PVC grade SN8 is more rigid and can withstand greater loads, but is made to order only. All products are made from durable and impact-resistant material, which undergoes multi-stage quality testing and has the appropriate certificates.

PVC pipe for external sewerage price

Before buying a PVC pipe for external sewerage, decide on its purpose and size.

PVC pipe for external sewerage, the price of which is always presented in our catalog, has an optimal balance between pricing policy and high quality. It is well suited for sewerage work for a wide range of purposes and provides ease of installation and transportation. Its reliability will significantly reduce the number repair work.

The Tera-Plast company sells PVC pipes at manufacturer prices wholesale and retail. Our trading and production company has been developing steadily since 2012. You can order products from us in any volume for creating long-distance pipelines. Thanks to our own fleet of vehicles, you can buy PVC pipes for external sewerage with delivery to the site. Delivery - within 1 day in the Moscow region.

Today, plastic pipes have almost completely replaced their metal counterparts in sewer systems. They have such operational advantages as durability, low cost, minimal weight and ease of installation, which is achieved through the use of sewer fittings, which we will discuss in this article.

You will learn what sewer fittings exist and what materials they are made from. Varieties of fittings, their standard sizes will be considered, and recommendations for installing a sewer system with your own hands will be given.

Contents of the article

The use of plastic products in sewer lines

To equip sewer systems, pipes and fittings are used from materials such as PVC (polyvinyl chloride), PE (polyethylene) and PN (polypropylene). Unlike steel and cast iron products, which are connected by welding, installing plastic pipes is much easier, since their joining does not require special equipment.

To the benefits plastic fittings sewerage includes:

• low weight, which facilitates their transportation and installation;
• long service life – the service life of a polymer pipeline reaches up to 50 years, which is achieved due to the material’s complete resistance to corrosion and chemically aggressive substances;
• wide temperature regime– can be used to remove hot waste with temperatures up to 95 degrees;
• a wide range of fittings, different shapes and the dimensions of which allow the formation of a sewer pipeline of any configuration.

They are shaped elements used to connect individual pipes to each other, as well as to connect to a pipeline. Fittings for sewerage have dimensions corresponding to the diameter of pipes on the market.

According to the provisions GOST No. 21.604 “Water supply and sewerage“, for styling internal sewerage you need to use the following PVC sizes pipes:

• bathtub drain pipe – diameter 40 mm (laid with a slope of 1:30);
• shower – diameter 40 mm (slope 1:48);
• toilet bowl – diameter 110 mm (slope 1:20);
• sink – diameter 40 mm (slope 1:12);
• bidet – diameter 40 mm (slope 1:20);
• sink – diameter 40 mm (slope 1:36);
• combined drain for shower, bath and sink – diameter 50 mm (slope 1:48);
• central riser – diameter 110 mm;
• bends from the central riser - 60 mm.

For installation of external communications you need to use pipes with a diameter of 160-200 mm. Sewer pipes and PVC fittings are selected so that their sizes match each other.

Features of choosing pipes and fittings for sewerage (video)

Classification of sewer fittings

The variety of connecting elements used for pipeline installation is classified according to two parameters - scope of application and connection method. According to the scope of application, the designs are divided into fittings intended for installation of internal sewerage, and products for external systems.

Depending on the connection method sewer fittings classified into:

• bell-shaped (inside plastic construction a rubber O-ring is installed), which ensures strong fixation of the pipe and tightness of the entire system;
• for gluing, without sealing ring.

In terms of reliability and durability of the connection, adhesive fittings benefit, since the rubber seal during operation can lose elasticity and shrink, resulting in a gap forming between the walls of the connected structures, which causes leaks.

As an adhesive for PVC installation sewerage systems, compositions based on a mixture of polyvinyl chloride and tetrahydrofuran are used, which, after hardening, form a material according to operational characteristics similar to the plastic from which the pipes themselves are made.

Verified adhesive compositions for installation of polymer pipelines – “ Tangit”, “Vinilit”, “Phoenix” and “Marx”, current VSN 35-86 “Installation instructions plastic pipes”recommends using “ GIPC-127“.

Types of fittings for PVC sewerage

Let's look at the types of fittings for internal sewerage equipped with a rubber O-ring:

1. Coupling - used to connect two parallel pipes to each other; there are also inspection couplings that have an openable window for cleaning the system.
2. Reduction (adapter between different diameters) – used for joining pipes whose dimensions do not match, as well as for connecting cast iron products with plastic ones.
3. Tee - allows you to make a parallel or inclined branch from the main pipeline; they are available with an inclination angle of 45, 65 and 90 degrees.
4. Two-plane cross - makes two perpendicular branches to pipes of identical or different diameters, angles of inclination - 45 0 and 90 0.
5. Single-plane cross - used to arrange two parallel branches, angles 45 0 and 90 0. With the help of crosses they are most often brought down drain pipes from bathtubs, sinks and plumbing fixtures to the main riser.
6. Bend - allows you to rotate the laying of two parallel pipes, angles of 30, 40 and 90 degrees.
7. Compensation - used during repair work to replace a damaged section of the pipeline, which is previously cut out.
8. Plug – blocks the transported liquid during repairs or inspection of the pipeline.
9. Aerator (sewer valve) – installed on the upper end part sewer riser, blocks the release of sewer gases into the room through the toilet, which can occur due to air vacuum inside the riser, in which the water seal is sucked out of the siphon.

For installation of external sewerage, in addition to the same range of connecting elements as during installation internal system, the following types of shaped structures are used:

• – designed for blocking reverse circulating fluid in the external pipeline, they must be equipped with less than 2 cm;
• double-jointed siphon - connects two parallel pipes, forming a bend at the junction, which creates an obstacle to the reverse flow of sewer gases.

Technical requirements and dimensions connection fittings made of PVC are given in the following regulatory documents:

• GOST No. 18559 – for non-pressure sewerage;
• GOST No. 52135 – for pressure systems.

The fitting sizes must be selected according to the diameter of the pipes used. The following standard sizes of shaped structures for external sewerage are available on the market:

• couplings – diameter 110-400 mm (inspection coupling up to 315 mm), length 12-33 cm;
• bends – ∅ 110-400 mm, distance between sockets 1.5-9 cm;
• tee for 450 – ∅ 110-400, length of side sockets 14-53 cm, height from the end part to the beginning of the protrusion of the socket – 14-50 cm;
• check valve - ∅ 110-250, length from 30 to 52 cm;
• two-arm siphon – ∅ 110-200 mm, length 51-82 cm.

PVC fittings for installation of internal sewerage have a diameter range from 50 to 200 mm. To fasten pipes to walls, plastic clamps are used, which are seated on load-bearing structure using two anchors.

Installation and connection of plastic pipelines must be carried out in compliance with the following requirements:

1. PVC pipe cutting large sizes is performed using a special tool - a pipe cutter, which can be replaced with a grinder or a hacksaw. The main thing is that the cut is perpendicular to the axis of the pipe, since a tight connection cannot be made if there are gaps at the joint.
2. After cutting, the edge of the pipe must be cleaned of burrs using a file and sandpaper.
3. When using adhesive fittings, the joining areas must first be degreased, after which glue can be applied. The composition is applied in an even layer using a brush; excess glue when joining structures is removed with a rag.
4. If fittings with a rubber seal are used, the contacting surfaces must be coated before installation, which will reduce the risk of leaks. The pipe should not be installed all the way, but so that it forms compensation gap 1 cm. You will need to perform preliminary joining and mark the entry boundary on the pipe.

If done correctly, the sewer pipeline will not require repairs throughout its entire service life.

Cast iron pipes, traditionally used for water supply and sewerage systems, are increasingly being replaced by plastic pipes. Trends of the times and modern technologies make it possible to use PVC sewer pipes even in cases in which previously the use of pipes other than cast iron was problematic.

Long-term experience with plastic pipes shows that their use is quite justified in the case of transporting not only ordinary water or industrial and domestic wastewater, but also aggressive liquids.

Characteristics of polyvinyl chloride sewer pipes

Advantages and disadvantages

Like any other, PVC pipes have their advantages and disadvantages. The “advantages” of plastic sewer pipes include the following technical characteristics:

• high strength;
• resistance to both external and inner surface pipes under the influence of chemical and mechanical factors;
• smooth surface that prevents the pipe lumen from becoming overgrown due to solid deposits;
• stability at low temperatures environment;
• lack of permeability: impossibility of penetration of runoff into the soil and groundwater into the pipes.

In addition, the advantages of PVC pipes are their environmental friendliness, the ability to operate for a long time and an affordable price.

The main disadvantage of sewer pipes made of PVC is that they lose their strength when high temperatures. As a result, the service life of the entire system can be significantly reduced. Limit operating temperature PVC sewer pipes have a temperature of no higher than 40 degrees.

In extreme cases, short-term exposure of pipes to liquids with temperatures up to 80 degrees is possible.

Features of application

The main application of PVC sewer pipes:

• Installation for wastewater disposal from residential and industrial buildings.
• Installation of systems inside walls and floors.
• Assembly external systems followed by laying in the ground.

The existing classification of PVC pipes by strength divides them into:

• Lungs. They are mainly used for the installation of sewer systems located at relatively shallow depths. Designation – SN 2.
• Average. Systems assembled from such pipes can be placed under roads with light loads. Designation – SN 4.
• Heavy. Used when laying pipeline systems under highways or industrial buildings. Designation – SN 8.

How to choose PVC pipes for sewerage?

In order to choose the right PVC pipes necessary for work in specific conditions, it is worth carefully considering all the parameters. You should pay attention to the dimensions and some characteristics:

1. indoor and outdoor;
2. length of sections;
3. safety margin required in specific conditions;
4. Additional features. For example, to organize protection, pipes made of a material that has the ability to self-extinguish are used.

The purchased products must comply with the requirements of GOST - PVC sewer pipes must:

• comply with standard markings;
• undergo mandatory tests assessing their performance;
• be properly packaged;
• transported in accordance with the requirements of the standard.

Compliance by manufacturers with all GOST requirements is a guarantee that the buyer will be able to choose suitable pipes for the installation of various sewage systems.

Stages of assembling a sewerage system from PVC pipes

Install a water supply or sewer system PVC pipes can be made quite easily. The work can be done either with the help of professionals or independently. The main thing is to follow a number of simple recommendations that will help you install pipes efficiently, in a short time and relatively inexpensively.

Installation steps:

• You must first carefully select the pipes themselves and all PVC. You should carefully check all the angles and inclinations of the system, and adjust the component parts to each other.
• Be sure to mark the parts so as not to confuse them and their locations during the installation process.
• Check how the pipes fit into the sockets. Each pipe should fit 2/3 into the socket easily. To ensure that the pipe is completely inserted into the socket, some force must be applied.
• Connect the components of the system using.

To make the parts to be glued together stronger, you can give all surfaces a slight roughness.

• After applying the adhesive layer, immediately put on the necessary fittings for PVC sewer pipes.
• If it is necessary to create a complex branched pipeline system tees are used. The technology for connecting PVC pipes through these parts is no different from directly connecting two pipes or assembling through simple fittings.

• Upon completion of installation, it is mandatory to check the system for leaks. To exclude any leaks, the test must be carried out for at least one hour.

Increasingly, when installing drainage and sewerage systems with metal and cast iron pipes plastic pipes compete. Their characteristics, which are in no way inferior to traditional analogues, and sometimes even superior to them, make PVC pipes for sewerage popular among consumers who use them to create fairly inexpensive and durable pipeline systems.