The need to cut into the sewer arises when purchasing home appliances: a washing machine or dishwasher. Box in sewer pipe performed different ways, depending on the type of system.

Photo: Insertion using a tee

Pipes used in sewerage

The following pipes are used for sewerage:

• made of plastic;
• steel or cast iron.

There are plastic pipes made from polyvinyl chloride (PVC) and polypropylene (PP). The first ones are used for internal wiring as risers, for external sewerage- with insulation. Polypropylene pipes are durable and resistant to high temperatures. As for cast iron pipes, it was they, and not steel ones, that proved to be better in use. After all, steel is a metal susceptible to corrosion. However negative side cast iron pipes – heavy weight. Thus, polymer pipes better in all respects.

Tapping devices

To insert into sewer system use:

• tee;
• adapter;
• pipe.

Photo: Tee

The tee is most often connected to plastic pipes. On the eve of work, the water is turned off. The sequence of actions is as follows:

1. The pipe is cut so as to remove part of it, equal to the length tee.
2. The pipeline is assembled by inserting rubber seals.

Photo: Oblique tee

To prevent clogging of the sewer during work, use an oblique tee.

Sometimes it is not possible to disassemble the sewer system, for example, if it is cast iron. Then they cut into it by drilling a hole, using an adapter.

Photo: Adapter

However, it should be remembered that the adapter is usually used to connect pipes whose size is several times smaller than that of the pipe into which the insert is made. In this case, the adapter is connected to the pipe from above or at an angle of 45 degrees.

Insertion into a sewer pipe using an adapter is carried out in the following sequence:

1. The pipe at the work site is first cleaned.
2. Make a hole in accordance with the diameter of the adapter.
3. The adapter is secured with clamps and coated with sealant.
4. Finally, the rubber adapter and pipe are inserted into the adapter.

If the pipes in the house are metal, then tapping into the sewer is done using pipe sections. Its diameter should be the same as the diameter of the pipe into which they are cutting. This is necessary to reduce the gap between the pipes.

It is very important: before starting to drill a pipe, warn your neighbors not to drain the drains for a while and make sure for yourself that there is no liquid or pressure in the system.

Insertion into the riser

As a rule, the riser is made of a plastic pipe with a diameter of 110 mm. If the pipe to be connected is of a smaller diameter, then use an adapter.

At the same time, you need to remember: if the drain comes through a riser from the upper floors, the presence of protruding parts of the pipe is extremely undesirable, since a blockage may form in this place due to debris falling from above.

Box in sewer riser it becomes much more difficult if the pipes are of the same diameter - 110 mm. In such cases, part of the pipe is removed, then a tee and expansion joints are used. A compensator is a piece of pipe with different diameters. The wide part is attached to the riser, and the narrow part is attached to the tee. Before installation, you need to calculate at what height the tee will be installed. This is important because the pipeline slope must be at a certain height. In this case, you should take into account the length of the riser that will fit into the lower part of the tee. This is how the lower cut mark of the riser is determined.

The upper mark is calculated as follows. The part of the riser that is to be cut must be equal to the length of the compensator. The length of the compensator is added to the lower mark and the upper mark is obtained.

Photo: Inserting a tee and compensator into the riser

How to crash into a sewer pipe. Work order.

1. The riser pipes are cut according to the marks. For plastic pipes use a hacksaw.
2. The part of the riser that will go under the compensator is coated with sealant.
3. Put the compensator on until it stops.
4. Connect the compensator and tee, connect the pipeline.
5. The riser is attached to the wall with clamps. The clamp prevents the pipe from sliding down and undoing the pipe connection.

In order to understand how the insert is made, it is worth watching the video:

Another useful video:

Other cases of tapping into sewers

Sometimes situations occur when it is not possible to cut a sewer pipe and use a tee, and the cut-in pipe will be smaller than the main one. Then the insertion should be made using an overlay on the pipe.

Photo: Insertion into a horizontal pipe from above

For work, an overlay of the same diameter as the pipe to which the connection is made is selected. Then the sequence of actions is as follows:

• A hole is cut in the pipe, and the edges of the cuts must be cleaned.
• The edges of the hole are lubricated with sealant and a pad is applied so that the outlet pipe coincides with the cut hole.
• The cover is secured with clamps, and a plug is put on the drainage system.

The flawless operation of the sewer system depends on correct selection pipes and high-quality sewer connections.

Tapping into a sewer pipe will require appropriate tool depending on the method and material of the pipes. How to crash into plastic or cast iron pipe Let's take a closer look in this article!

Situations often arise when it is necessary to insert a pipe into an existing sewer system to organize drainage from a new household appliance. Naturally, you can just get by with a tee. However, this approach can only be implemented when an insertion is made into a cast iron sewer pipe 110. In a system constructed from PVC pipes, one tee is not enough.

Tap-in technology

There are several options to solve this problem.

Tapping using a tee

As noted earlier, this option is used in 90 percent of cases in a situation where the tee is mounted on a metal pipe. The thing is that to strengthen the junction of two parts you will have to use welding. And at the initial stage of work, it is necessary to saw the pipe and cut a piece, which in its parameters will most accurately resemble the tee used for installation. It is worth considering that the tee in the considered tapping method will be mounted in the form of a coupling on a section of pipe.

When work must be carried out on a system manufactured with using PVC pipes One pipe should be replaced with several short sections, between which a piece of pipe equipped with a pipe will be placed. It is into this part that additional equipment will be connected. The problem with this installation is the connection using sockets, which are intended for inserting a pipe.

Insertion into PVC pipes

You can make a connection into a sewer system, the installation of which used plastic pipes, on your own. For work that will solve the problem of how to crash into a plastic sewer pipe, you will need:

• Prepare a piece of pipe along with the pipe required diameter.
• Prepare the workpiece. This stage of work involves leaving part of the part and the pipe extending from it. The distance is calculated so that the insertion point into the main part is reliably covered.
• A hole is drilled in the pipe with a diameter identical to the width of the pipe.
• On inner side sealant is applied to the flange. It is also lubricated outer side details near the hole.
• The flange is placed on the pipe and tightened tightly around the edges with clamps. The fastening should be tightened gradually until the sealant begins to ooze from under the flange. Excess grease should be removed.

If tapping into a sewer pipe is carried out in places with little liquid pressure, then there is no need to use clamps. Here it is enough to connect the flange to the pipe with ordinary electrical tape.

Insertion into a metal pipe

If you need to insert metal parts into a sewer riser, it is best to use a ready-made tee, which has a slightly larger diameter than the pipe. It is necessary to first separate the part without the pipe from the tee.

However, there are often situations when you have to prepare the flange yourself. To do this, you need to purchase a pipe whose internal circumference will coincide with the external circumference value of the connection pipe. Next, the part is cut longitudinally, a hole is drilled in it and a pipe is welded. To fully answer the problem of how to cut into a cast iron sewer pipe, all that remains is to weld the prepared flange to the pipe. If welding machine is not at hand, then you should use any sealed mixture and clamps.

It is worth remembering that before starting the insertion, you must make sure that there is no liquid pressure in it.

Tapping tools and how to use them

A situation where you need to connect to an already functioning sewer system can arise at any time. Buying a new dishwasher or washing machine, installing a washbasin or faucet, connecting a heating pipe - all of the above is a reason for tapping into the sewer system.

The modern market is ready to offer the consumer a wide range of various adapters, which are ideal option solutions for every specific situation. Connecting with them will not be a problem. Currently, there are two most common insertion methods:

1. Using an adapter. This option is used when cutting into a sewer pipe of 110 or 100 millimeters. By the way, when inserting into sewer 110, the size of the adapter will be 50 millimeters.
2. Use of plastic fittings. This option is used when installing to a pipe with a diameter of 32 to 40 millimeters.

To perform high-quality work with the adapter, you should follow the following list of simple steps:

• Completely limit access to water.
• Attach the bit to the drill and use a power tool to make a hole the right size in the pipe.
• If an adapter with bolts is used, then the part is put on the pipe and the bolts are tightened.
• When installing without fasteners, the surface is first degreased, the insert is applied and the nut is tightened.
• To prevent leaks from forming, it is worth additionally lubricating the joint with sealant.

The quality of the connection into the sewer system will allow the home owner to avoid repairing the entire system and connect a new plumbing or household appliance without unnecessary problems.

Methods for inserting outlets from household appliances

It is this problem that often causes sewer connections. Moreover, it occurs not only in houses with an old layout, but also in new apartments designed taking into account modern conditions operation. It is in such houses that the pipe in the bathroom, where the washing machine is installed, is concreted into the wall. So it turns out that it is easier to make an insert than to install a new siphon with seven ensuing consequences.

To work you will need the following tools:

1. Metal strip, drill and large diameter drill bit.
2. A clamp intended for fastening the outlet.
3. FUM tape.

The work is carried out in the following sequence:

• A clamp is placed on the outlet, intended for fastening metal strips. To fix the clamp on the wall, you need to drill holes in it.
• Since the insertion is carried out in pressure sewer, you need to let the water through. This action will avoid the appearance of a foul odor.
• A hole is drilled in the pipe. If you cannot find a drill of a suitable diameter, then for further work you will need a sharp knife or file. With their help you can widen the hole. It is important to understand that the hole must remain round shape, and its diameter can be only two millimeters less than the identical parameter in the outlet.
• The outlet is wrapped with FUM tape and inserted into the hole. There is no need to try to save on the tape and, if necessary, it is better to rewind it completely for reliable fixation.
• Places for attaching metal strips are marked on the wall, holes are drilled in them and dowels are screwed in. The fastener is twisted with maximum density in order to tightly and securely fasten the clamp to the outlet.

The last step is to coat the edges of the joint with sealant. As soon as the lubricant hardens, an additional connecting layer is formed at the joint.

Sometimes there are times when a connection must be made into a sewer pipe of an existing system in order to organize, for example, drainage from such a necessary household appliance as a washing machine. How to solve this seemingly simple problem?

You can cut the pipe and insert a tee. But this is how you can approach the question if the existing sewer pipes are metal. If the pipes are modern - plastic, this method is not applicable. How to be in this case? It's worth taking the time to figure it out in various ways tapping into the sewer, and only then do something.

Various ways of tapping into the sewer system

Tapping with a tee

When cutting through a tee, the first step is to saw through the pipe and cut out a piece of it, if possible, as accurately as possible to the size of the tee that will be installed in this place. It should be noted that in this case the tee will be put on the pipe sections in the form of a coupling. Then you need to very carefully weld the junction of the pipe and the tee. This work should be entrusted to an experienced welder.

If it is intended to insert into a system consisting of plastic pipes, one pipe is replaced by two small sections, between which a piece of pipe is placed, equipped with a pipe, just intended for connection additional equipment. In this case, the main problem may be the connection using the sockets into which the pipes are inserted.

Insertion into a plastic pipe

There are ways to cut into a sewer pipe made of any material without the need to cut it. Many people are quite capable of making such an insertion into a system consisting of plastic pipes. To do this you need:

• Prepare a piece of pipe with a pipe of the required diameter.
• Cut out the workpiece: leave the pipe itself and the part of the pipe from which it departs, so that you can reliably cover the insertion point into the main pipe.
• Drill a hole in the pipe. The diameter of this hole must exactly match the diameter of the pipe.
• Lubricate inner surface the resulting flange and outer surface pipe around the hole with sealant.
• Place the flange on the pipe and tighten it tightly around the edges using clamps. The clamps should not be tightened very tightly, but carefully, until the sealant begins to appear from under the flange. Remove excess sealant.

Pro tip:

If a connection is made into a sewer system with low water pressure, the use of clamps is not necessary. In this case, it is quite possible to get by with electrical tape, firmly connecting the pipe and the flange with it.

Insertion into a metal pipe

If you have to make a cut into metal pipe, it’s easier, of course, to use a ready-made tee with a slightly larger diameter, sawing off a part from it without a pipe. But sometimes you have to prepare a suitable flange yourself:

• For this purpose, a pipe with internal diameter, coinciding with the outer diameter of the pipe to which it is necessary to connect.
• The pipe is cut lengthwise, a hole is drilled in it and the pipe is welded.
• The work of welding such a flange and pipe must be carried out by a professional. If it is impossible to carry out high-quality welding, you can use clamps and sealant.

The connection can be made into any system - plumbing, heating, sewerage. The main thing, before breaking through a sewer pipe to connect an outlet, is to make sure that there is no liquid pressure in it.

Tapping tools and methods of their use

Connect to already existing system sewerage may be needed at any time. Purchasing a washing machine or dishwasher, installing an additional sink, an additional faucet or another heating pipe- all this is a reason for tapping into the public sewer system.

The huge selection of various adapter devices (flanges, adapters) presented on the modern market allows you to find optimal solution each specific problem and implement without special costs connection to internal system sewerage in several ways:

• Use of adapters. Adapters with a diameter of 50 mm are mounted on pipes with a diameter of 100-110 mm.
• To connect to pipes with a diameter of 32-40 mm, inserts with a diameter of 19 to 22 mm with plastic fittings are used.

To make a quality insertion using a purchased adapter, you need to follow a few fairly simple steps:

• Shut off the water in the sewer pipe.
• Drill a hole in the pipe with a hole saw of a suitable diameter placed on a drill.
• When using an adapter with bolts, place it on the pipe and tighten the bolts.
• When inserting without bolts, degrease the surface, attach the insert and tighten the nut.

Pro tip:

To avoid leaks, you can additionally use sealant to seal the adapter.

A high-quality insert into a sewer pipe will avoid the need to repair the entire system, as well as with virtually no special effort add extra sewer outlet any newly purchased plumbing or other type of fixture.

If you decide to install another sink, buy a new washing machine or dishwasher, you will most likely need to tap into the sewer pipe. There are many ways to do this, despite the fact that construction market present big choice all kinds of adapters. We’ll talk about how to cut into a sewer pipe in the simplest way below.

Inserting into a sewer pipe using a tee

It is worth noting that when inserting into a plastic sewer pipe, I rarely use tees, because there is a high probability of depressurization of the system in the connection areas. Adapters are usually used when inserting into a cast iron sewer pipe.

To make a tie-in, you will need to perform a number of such actions:

1. Buy directly the tee itself.
2. Shut off the sewer system. People living in apartments at this stage are asking their upstairs neighbors not to use the sewer system for a certain time. But in any case, you should make sure to have several containers with you just in case.
3. Make all measurements at the location where the tee is installed.
4. Cutting out the part of the pipe that will be replaced with a tee. You can use a grinder, but you need to be prepared for the fact that in some places the disk simply may not reach the desired points on the circle. In such situations, it is not recommended to resort to completing the procedure with a hammer, because due to the fragility of cast iron, a large segment of cast iron may simply collapse. Therefore, in this case, it is better to use a hacksaw to finish the metal.
5. Installation of a tee. First of all, the tee is put on the short part of the riser, while it is pulled to the side. After this, the more movable part of the pipe is taken in the same direction and put on the tee. Then they proceed to leveling the riser line, after which the pipes are inserted into the tee as deeply as possible. If the pipes need to be temporarily secured, this can be done using a bracket.
6. Compound old pipe with a tee. The master will need some skills and patience to perform such an operation. This is because old pipes run very close to the floor or wall, and this greatly impairs access to the welding point.

It is worth noting that before making an insert into a cast iron sewer pipe, very precise markings are carried out at will. There is no point in calculating down to the millimeter, since all elements are joined using the welding method.

When inserting into fan pipe made of cast iron, for example, it would not be superfluous to mention that you need to use only high-quality sealants, since in the case of such work, even the most by professional craftsmen, when using untested sealants, areas with obvious leaks may form.

To create airtight joints, it is best to resort to the use of well-known silicone sealants or epoxy resins. Sealing tape is quite popular these days. It is very easy to operate - you just need to clean the connecting surfaces from dirt and grease and wrap the edge of the pipe in two layers of tape in a spiral without forming wrinkles. Agree that this is as simple as possible!

Speaking of crashing into a sewer plastic pipe, then in this case the installation of the tee will be much easier. This is explained by the fact that plastic pipes need to be connected with sockets, and not joint to joint. In other words, when inserting into a plastic pipe, welding will not be required; you can do without special glue for such purposes.

Inserting into a riser without removing part of the pipe

To perform this task, you will need a connection, that is, a collapsible clamp (more details: " "). Its design should include one blind half, and the second should have a pipe, to which a little later you will need to connect a sewer pipe, which in turn will be connected to a new plumbing element.

The clamp is installed in the following sequence:

1. First, water and sewerage are shut off.
2. Holes are drilled in the pipe.
3. Next, fix the clamp with the pipe on the plastic pipe. Often tightening occurs using a screw connection.
4. Now a seal is inserted into the pipe; as a rule, such a lining on a sewer pipe is rubber, made in the form of a corrugation.

1. On last stage The outlet pipe is inserted into the corrugation.

To insert into a plastic pipe, spend as much as possible less funds, you can make the clamp yourself.

In this case, the sequence of manufacturing operations will be as follows:

• Select a suitable plastic pipe - its internal cross-section must correspond to the external cross-section of the pipeline into which the insertion is made.
• A piece is cut from the pipe required length– it should be 5-10 cm larger than the outer section of the new pipe.
• Now this pipe needs to be cut lengthwise. One of the halves will serve as the outer back piece of the clamp.
• The remaining half is drilled to obtain a hole with a cross-section equal to the outer diameter of the pipe being mounted.
• Now you can glue the outlet pipe into the resulting gap.
• The inside of the clamp must be treated with a sealing compound.
• At the end, the two components of the clamp must be secured to the pipe.

Please note that for complete tightness and reliability of insertion into the sewerage system, it is recommended to use metal for fastening the edges of the halves band clamps. However, provided that the system does not high pressure, you can use regular electrical tape.

The last thing you need to do is drill a hole of the required diameter through the pipe in the pipe into which the insertion is made. Make sure that back wall the pipes remained undamaged.

Method of inserting a drain pipe from a washing machine into the sewer

Very often when purchasing washing machine there is a need to connect it to the sewerage system, and the pipes end up embedded in the walls. Moreover, this problem is inherent not only in old houses, but also in new buildings. In order not to waste time installing an additional inlet into the siphon, they often prefer to insert it into the sewer pipe.

The following tools will be useful during work:

• drill and large drill bit;
• clamp for fastening the outlet from the machine;
• metal tapes;
• FUM – tape or sealing fluoroplastic gasket.

The insertion process includes several sequential steps:

1. To fix the metal strips on the outlet, install a special clamp. If you want to mount it on the wall, you will need holes in it.
2. In this case it is inevitable bad smell, after all, this is a sewer pipe. To minimize it, you need to drain the water.
3. Now you need to make a hole in the pipe, the diameter of which is slightly smaller than the cross-section of the outlet. If you don't have a large enough drill, you can widen the hole using a circular motion. The main thing is that there is an even circle.
4. The outlet pipe must be wrapped with FUM tape and inserted into the resulting hole in the pipe as tightly as possible. To ensure tightness, you can further wind the tapes until the desired result is achieved.
5. At the last stage, you need to mark places in the wall for metal strips to secure the pipe. You will need to screw dowels into the holes to achieve a secure fastening.