fittings for sewerage in Moscow

Polypropylene sewer fittings presented in our online store of plumbing engineering, are divided into two large groups - fittings for external sewerage and fittings for internal sewerage. They are easy to distinguish from each other by appearance, more precisely, by color: fittings for external sewer networks are orange, and for internal ones - gray. It is advisable to select sewer pipes and fittings of the same brand so that they fully match each other.

Polypropylene is one of the most suitable materials to create sewer network, since it is resistant to various chemical influences, is not subject to rust and other negative impacts external environment. On the walls polypropylene sewer pipes and fittings, no organic deposits are created that reduce the permeability of pipes. Besides polypropylene pipes have a much longer service life than metal ones and are less prone to breakouts.

Unlike fittings intended for water supply and heating systems, sewer fittings are installed without the use of additional tools, threads or soldering - the pipes are simply inserted into them. This installation method is called socket. The only one additional material which is used during installation is a special lubricant or ordinary soap foam. The use of these tools will allow the sewer pipes and fittings to fit together as tightly as possible.

In addition to the usual polypropylene plumbing fittings varieties of pipeline elements - angles, crosses, plugs, couplings, tees - the group of sewer fittings includes specialized fittings, such as vacuum valves, check valves, umbrellas for internal sewerage, pipes, eccentric transitions, revisions, reductions.

U plastic pipes wires have their advantages.

Their installation is much less difficult than with other materials.

Plastic can be assembled without using a welding machine.

And the quality of such connections is in no way inferior to welded ones.

Every year, manufacturers produce more and more varieties of fittings designed specifically for of this material. Thanks to such a detail as a tee for plastic pipes, people's lives are noticeably simplified.

For the manufacture of fittings, as well as the pipes themselves, different materials are used.

• Polyethylene
• Polypropylene
• Metal-plastic
• Polyvinyl chloride

It is better to choose a tee for plastic pipes made of the same materials as the main line itself.

At the same time, the price of products from different materials different, even if other characteristics are the same.

Several methods are used to connect pipes using fittings.

• Crimping. Helps with the installation of copolymer type materials, metal plastic products. Or structures where the metal layer is located next to other parts.
• Electric welding using a special apparatus. When working with polyethylene products.
• Diffusion soldering. Great solution for metal-plastic or polypropylene.

Types of products

American women

This is a non-dismountable type. It is needed to connect plumbing fixtures to the pipeline. A special cone with a rubber or silicone sealing ring provides additional tightness.

On the elements being connected, each part in this part is separately fixed. Then they are tightened using a nut. This allows you to create reliable joints with maximum tightness.

Such fittings are available in two varieties:

• Direct
• Corner

Angular ones make it easier to create turns in highways. This does not create additional tension or tension.

For such structures, the thread can be internal or external. Thanks to this, there is no need for additional adapters during installation.

Shut-off and control valves

There are two main types of shut-off and control valves:

• Thermostatic valves
• Manual valves

The body of the structures varies:

• Polymeric. Helps organize soldering into the system.
• Metal. Supplied with threaded connections. Then on one side of the valve you can mount an American one. Thanks to it, the structure will not need to be completely disassembled during dismantling.

The scope of application of taps depends on the degree of tightness they have. Depending on this, they are used for cold water supply, hot water supply or heat supply, gas supply.

Must be used only for its intended purpose. They are not interchangeable.

About tees with crosses

Crosses with tees are a type of connecting elements that play a primary role when a pipeline is formed. Thanks to these details, it is easier to design the merging of several routes with each other, or branching. Central bends are made not only at right angles, but also at angles of 30-40 degrees.

Such fittings are connected by thread or soldering. There are modifications of a transitional type, where the design moves from one type to another.

Types and differences of tees

Currently, tees are produced with different characteristics. Indeed, in sewerage, literally every connection-related parameter matters. Even the slightest errors in directional orientation have serious consequences.

Tees for PVC are:

• Variegated
• Equal passage
• Oblique
• Direct

The most popular variety is a straight tee for plastic water supply pipes. It occurs most often in practice. The design includes a part of the pipe along with an outlet at an angle of 90 degrees.

In inclined tees, an outlet is formed at 30-55 degrees. This makes it easier to connect the sewer at a certain slope.

This is the best for those who are interested in inserting into the riser in apartment building. The remaining two groups differ from each other only in the diameters of the pipes with which they are connected.

An equal tee has the same diameter at all outlets.

But for a multi-pass model they are different. For example, the diameter of the pipe can be 50 millimeters, and the diameter of the tee can be 30. The perfect solution for on the sewer riser.

Equal tees. Classification

This large group is divided into several others:

• Simple mortise, without additional reinforcements. Such parts are needed in systems where a minimum pressure of up to 2.5 MPa is maintained. If the pressure is higher, then it is necessary to use pipes with lower pressure.
• With amplification. They are used where pressure reaches 4 MPa. Then you cannot do without reinforcement in the design. This variety also has its own subgroups of tees - there are models with overlays and saddles.

Equal tees vary depending on the manufacturer.

• Stamping-welded. This method allows you to achieve large diameter. The body and neck are first stamped separately. Only at the next stages are the parts welded to each other.
• Stamped. Extrusion on presses is assumed to be the main production method. The transition from the body to the neck is very smooth, which increases strength.
• Welded. In this case, two parts of the pipe are welded to each other. The housing becomes the part connecting the two elements of the highway. The neck is connected to a branch in the pipeline. This is the most simple model, from an economic point of view.

For the manufacture of equal tees, carbon, low-alloy steel is often used. They transport neutral liquids. For more aggressive media, stainless steel is used.

What types of transition tees are there?

They are divided into several types:

• With additional fastening. The housing is fixed to the support using cast brackets. In which self-tapping screws are then inserted. For crimping, or threaded connection the ends are formed.
• With a threaded end and a crimp nut.
• With press sleeve and compression nut.

For the manufacture of press sleeves, only stainless steel is used. Seals are usually polymeric. Brass is the go-to material for cabinet makers.

Taps with dies help with the design of threaded ends. When using such tees, the connection method is either pressing or crimping. In the latter case, a so-called collet fitting is used. Crimping involves the use of a press fitting.

Applications and types of plastic tees

Such tees are most often used in sewers. Here are a few that are most widely used:

• PVC inspection. This is the name given to couplings with additional third holes. They are screwed with special caps. This solution makes it easier to work with blockages in certain sections of pipes.
• Sewer tee at 45 degrees. Facilitates horizontal fastening of plastic pipes.
• At 87 or 90 degrees. To connect vertical risers with pipes horizontally.

Tees diameter

This parameter is selected depending on the type of pipes being connected. The standard indicators in this case are 315, 250, 200, 160 and 110 millimeters. Individual orders are created if the diameter in the design reaches 400-500 millimeters.

Some models have several parts with different diameters.

Technical characteristics of welded tees

Most often, welded models are used to connect branches to the main part of the pipeline.

Thanks to tees, it becomes easier to change the diameter of pipes, doing it without sudden transitions.

Such designs are often used even in the Far North.

The starting materials for tees are often seamless pipes.

Externally, welded tees look like steel parts consisting of three pipes and the tee itself.

The pipes are covered thermal insulation material, to improve environmental protection.

What to look for when choosing tees

First you need to understand what tees are intended for. In some cases this is important, in others not so much.

There are other parameters that matter:

• Diameter of pipes requiring connection. It must match the characteristics of the pipe of the tees. It should be borne in mind that not only centimeters, but also inches are often used for measurements. This makes it easier to select threads, although you need to spend some time converting one unit to another.
• Type of thread. In tees it is often internal. And in some situations one cannot do without its external variety.
• Thread pitch. Inch thread – standard option. But sometimes a metric one is required, the depth and pitch of which are strictly defined.
• Permissible pressure. It is important that the tee is not the most weak point for the system. Tees must withstand the same pressure as the rest of the pipeline.
• Limit temperature, lower and upper.

Application of tees for sewer systems

The coupling-socket ends should be directed to the starting point of the sewage system. Exit to in this case The end of the pipe becomes the entrance, and the pipe itself becomes the entrance.

O-rings must not be removed. Better lubricate them suitable solutions, if movement is no longer free.

More information

Steel tees are widely popular, known for their strength.

Equal passage steel varieties are most often used for modern pipelines.

They are used where the loads are severe, but the condition working environment remains calm.

The conditions under which the tee can be used is largely determined by the production method.

Over the years, it has been proven that cast, turned and stamped varieties can withstand maximum loads, regardless of operating conditions.

Even if extreme temperatures are maintained for a long time.

Steel tees, like other groups, are also divided into different types of fastening. Threaded ones are used where pipelines are small in size.

In large and medium-sized designs, preference is given to flanged options. Welded fastening allows you to organize the movement of coolant along the main lines, which are subject to the most stringent requirements.

More information about bends, tees and plastic couplings can be seen in the video:

First of all, plastic pipelines are good because you need to tinker with their installation and installation much less than if you used metal products.

Where it is impossible to work with steel without a welder and welding machine, you can assemble the plastic with your own hands. Moreover, the quality of the connection will not only be no worse than a welded one, but sometimes even better.

Isn't this an indicator of the effectiveness and benefits of using plastic pipes and fittings? With the growing popularity of plastic pipes, a whole group of manufacturers has formed, supplying the market with the most suitable fittings. various types and forms. All of them are designed to make life easier for people.

In this article we will talk about such an important fitting as a tee. Let's look at its varieties, scope of application and installation methods.

Contents of the article

Properties of polymer fittings

To begin with, let us outline the main directions of plastic products. Both the production of pipes and fittings for them are taken into account. After all, by and large, it’s all the same thing.

The golden rule of plumbers says that the fitting material must clearly correspond to the pipe material and nothing else. This applies to both metals and polymer products.

With metals the matter is clear - constant contact of those differing from each other according to the formula metal products sooner or later leads to destruction or oxidation of the latter. It doesn’t matter which oxidizes faster; in any case, the tightness of the connection will remain at risk.

With plastic things are different. It does not oxidize, but it does not have the same strength as steel or aluminum. Where one type of polymer copes, another will lose ground.

For example, polypropylene can withstand carrier temperatures up to + 90 degrees, while for polyvinyl chloride the working limit is set at +50 degrees. Even if we use boiling water in the system, it is not a fact that both materials will react equally.

In construction, for the production of pipes and fittings, the following are most often used:

• polypropylene;
• polyethylene (high or low pressure).

Each type of plastic affects the final properties of the pipe. Thus, polypropylene rightly takes first place in all respects. It is the most durable, reliable, works with a wide temperature range, does not age, and goes well with reinforcement.

Pipes made from it are perfect for internal systems water supply and heating.

Polyvinyl chloride or PVC is softer than polypropylene and cheaper. Withstands media temperatures up to + 50 degrees (but there are exceptions, depending on production process And various kinds additives)

We will concentrate on this in more detail. PVC is used primarily for forming sewer pipes.

Polyethylene products are the cheapest, divided into polyethylene high pressure(medium strength, good temperature regime) and low pressure (highest strength, poor temperature conditions). Both options are also used primarily for the manufacture of sewer pipes.

Purpose of tees

There are a huge number, and they all perform their own tasks. Some connect pipes in a straight line, others allow you to assemble the pipeline at angles, with transitions to another plane, etc.

Without fittings, pipes would have to be bent manually, connected by welding, in general, spending more time on this process than it deserves.

Tee for PVC pipes- a fitting whose benefits are difficult to overestimate. His task is.

Imagine that you have at home a distribution network of sewer pipes leading to a single riser. And it is necessary to connect another pipe to the riser, in a completely unexpected place. How to do this without a tee? Very difficult.

You will have to cut into the pipe, use drills, etc. Not only is it not very convenient, but the quality of the insert will suffer significantly. Essentially, you are creating a potentially dangerous section of pipe.

Another thing is the installation of a tee. A tee is a fitting in the form of a part of a pipe, with a side outlet. Mount the tee in the riser at the desired level, and all you have to do is simply connect to its output.

If your sewer gets clogged with enviable regularity, it means that somewhere the builders made a mistake with the angle of inclination, rotation and insertion into the pipe.

Accordingly, PVC tees are distinguished:

• straight;
• inclined;
• equal passage;
• variegated.

The straight tee is the most common and frequently encountered. Consists of a part of a pipe and an outlet at 90 degrees.

The inclined one forms an outlet from 30 to 55 degrees, that is, it allows you to connect the sewer at an angle. For tapping into riser apartment building – best option. Two latest group differ only from each other. And the differences in them relate to the diameters of the pipes.

An equal tee has an equal diameter in all holes. That is, the diameter of the target pipe and the tee outlet is equal to the same number.

The multi-pass sample has different diameters. In it, for example, the pipe diameter will be 50 mm, and the tee outlet diameter will be 30 mm. Multi-bore models are ideal for installation on a sewer riser. After all, the cross-section of the riser pipe is, as a rule, much larger than the cross-section of the side sewer pipe from the apartment.

Types of PVC tees (video)

Installation

Tees are installed, as we have already noted, mainly during the process of assembling the sewer pipe. Any other scenario involves unnecessary waste of energy and resources, which is not good.

Tees are mounted in two ways:

1. Socket connections;
2. Using glue.

Installation in a socket is standard practice for sewer products. And PVC tees are no exception. The socket is the outer widened part of a pipe or fitting. One of the edges of the product is formed with an increased diameter. The difference is approximately 2-3 cm, but this is enough.

Rubber gaskets are glued inside the bell at the factory. Installing such fittings is the same as assembling a construction set. The pipe is simply inserted into the socket of the previous one, and so on along the chain. If necessary, the connection is additionally coated with sealants and.

Working with glue is a little more difficult, but more interesting. Builders also often choose bell-type connections for sewer pipes, only as the main one for PVC products.

They coat the edges of the pipe with it, then stick it into the socket and leave it for a while. In a few hours, the glue will set and harden, and the pipes will no longer be disassembled.

The last described method is called cold welding, because chemical composition The glue first melts the plastic it comes into contact with, and then, when the reaction slows down, causes it to harden. After processing, the plastic itself becomes monolithic, as if it were joined by welding.

There are several types of connecting tees:

1. Straight PVC tees for sewer pipes at 90/87 degrees. Attach vertical risers to the horizontal parts of the sewage system.
2. 45 degree angled tees. Helps in the formation of horizontal branches.
3. Revisions are special couplings that have an additional third hole that is screwed in using a special cap. They are used to prevent blockages and not have to look for answers to the question of how to clean sewer pipes at home.
4. Equal bore - the device has the same internal sections.
5. Multi-pass - the middle part has a distinctive cross-section.

There are also installations that differ in the manufacturing method. There are ordinary (transitional) and combined. The adapters have a crimp nut and a press sleeve. Combined ones come with internal thread or with a union nut.

There are various designs for a variety of pipe sizes. PVC tees can be connected using the PP method and the HDPE method. PP involves the use of sockets, and HDPE is installed using compression couplings or welding. The electrofusion method is also used, which is implemented using an electric heater and a connected soldering iron. And the butt method is heating the ends of the pipeline to a state of softening.



HDPE devices are manufactured using casting; they undergo special mechanical processing, which ensures increased strength. These installations combine or branch the flow and help connect plumbing siphons without welding. They are additionally put on for sewerage. They include steel or bronze bushings and can connect polymer and metal pipes. Installation is carried out using threaded, welded or crimped methods.

PP installations are used in all drainage systems. They are independent in their work high loads, temperature changes and cold. Compatible with any fittings and pipes.

When installing, be sure to take into account the expansion of devices when transporting hot waste water, leave a gap of 1 cm.