A visual aid on how to mint a cast-iron sewer. Do-it-yourself technology for caulking cast-iron pipes

Chasing cast-iron pipes with your own hands - is it real? Quite! If you have a desire to repair old communications, or replace cast-iron pipes with plastic ones in your apartment, then you will certainly find an hour or two of time to study the issue. And, having taken into account our recommendations and having a set of tools, you will be able to realize your idea. So, what is the chasing of cast-iron sewer pipes and why is it necessary to caulk them during repairs?

What is pipe stamping?

Why, despite the abundance of innovative materials, good old cast iron is still used in the construction of sewer communications? Because this material has high strength, and its consumer characteristics make it possible to make strong and reliable pipes from it that can withstand high loads even in urban sewer networks, and not just in household ones at their summer cottage.

The socket connection guarantees a quick installation of the system. To ensure the sealing of the joints, the chasing of sewer pipes is used. It is one of the technological operations and is produced by ramming the sealant into the seam between the socket and the pipe. And in modern socketless SML communications, a cast-iron SML tee is used to organize branches, the tightness of which is ensured by special stainless steel clamps with seals.

Chasing of cast iron sewer pipes is carried out at the entrance of the intra-apartment riser to the apartment, as well as at the exit of the fan pipe - a communication element installed in residential buildings and having more than one floor level, designed to prevent odors from entering the room from the sewer.

But, if, for example, SML systems are designed for use in non-pressure networks, then traditional cast iron systems withstand hydraulic pressure up to 0.1 MPa. At the same time, high-quality chasing of sockets of cast-iron pipes is a critical operation in the process of installing the system, since the entire operation of the pipeline as a whole depends on the degree of sealing reliability. Chasing cast iron pipes can be done in several ways using different materials.

What materials are used

Chasing a pipe in a sewer system can be done using:

cables;
filling with gray.

And, if pouring with sulfur is considered the old Soviet way, then chasing pipes with a cable can be done by hand with minimal theoretical training and a set of tools.

Kabolka is a rope made of flax, hemp or jute impregnated with antiseptic and resinous substances. It is used for sealing joints and seams of sockets and, thanks to impregnation, provides high resistance to decay and biostability. The consumption of cable for chasing pipes is calculated based on their dimensions: the length of the strand must exceed the circumference of the pipe by 25%, and its thickness must be such that it fits snugly into the annular gap. In this case, the cable must be laid into the socket with three bundles so that the overlaps of its ends are in different places along the circumference of the pipe. In the construction of sewer systems, tarred strands are sometimes replaced with rubber rings.

The joint over the cable is sealed with different filler materials. They provide complete tightness of the connection, prevent the extrusion of the cable under pressure from the contents of the system. Used as a placeholder:

cement;
asbestos cement;
lead.

The disadvantage of cement-based aggregates is their relative stiffness. If a leak forms at the joint, it is impossible to seal it without preliminary caulking, with minimal time and labor costs. Although asbestos cement is used to seal the joints of the sockets of cast-iron pipes, it has a higher elasticity compared to cement.

If sealing the seams of sockets with cement and asbestos cement is not difficult, then chasing cast-iron pipes with lead is a more complicated procedure and requires skills. After caulking the gap with a resin strand, a rope is placed in the socket gap, which is covered with a layer of clay on top. With the help of free ends, after almost complete drying of the binder, the rope is pulled out of the socket gap, and straightened lead is poured into the sprue formed in its place. In order for the vapors formed in the socket slot during its filling with lead to freely go outside, a hole is pierced in the side of the sprue.

Technology: main stages

Chasing the sockets of cast iron pipes begins with the identification of the type of sealant material. It can be cable or sulfur. After removing the waterproofing solution, you can determine which "seal" is in the socket.

If, after removing the waterproofing, when trying to loosen the joint, the process went quite easily, and the pipe began to swing or turn, we can assume that half of the work has already been done. This means that the socket is pressed with a cable and, in order to remove it, you just need to gently loosen the pipe, use a screwdriver to pick up part of the strand and pull out the entire roll. The procedure for dismantling a pipe installed on a cable is much simpler than caulking cast-iron pipes with sulfur.

If the nozzle is mounted on sulfur, the caulking procedure also begins with the removal of the waterproofing. But after that, the joint is heated with a blowtorch, as a result of which the joint sealant is completely melted. After the connection has cooled down, the pipe can be easily unscrewed from the socket.

Caution: chasing! Safety

When carrying out caulking, safety regulations must be observed. Personal protective equipment is especially important when removing a sulfur filling. When heated, sulfur releases a toxic gas that can cause poisoning if inhaled. Therefore, the caulking of the pipe on sulfur should be carried out in a gas mask.

When removing waterproofing - cement or asbestos cement - with a hammer and chisel, as well as when cleaning the pipe from sulfur residues, you should wear goggles.

A modern sewer system is a complex structure that at times increases the comfort of life for the inhabitants of a country house or apartment in a multi-storey building. In order for the sewerage system to function properly, during the installation process it is necessary to ensure that everything is done correctly, otherwise you may encounter trouble during operation.

Over time, sewer pipes fail and need to be replaced. Considering that in most Soviet-era buildings, mainly cast-iron pipes were used to install the sewer system, now it is necessary to carry out either a complete replacement or a partial one.

Chasing and chasing sewer pipes

Note! Cast iron pipes under the influence of aggressive factors from the outside can lose their functional abilities and fail in exactly the same way as plastic products and steel pipes.

An important place in the process of repairing sewer pipes made of cast iron is their caulking and caulking - procedures that are carried out using special technologies and building materials.

The one who assumes that it is easier to dismantle a sewer pipe than to install is mistaken. The first stage on the way to replacing an unusable element is the chasing of sewer pipes, or rather chasing. It takes a lot of hard work and dedication to do this job. This job is quite dirty and unpleasant.

Chasing a sewer pipe is required if the socket method was used during installation work.

Note! Chasing is performed in different ways, depending on which method was used to give strength and reliability to the connection.

To figure out how to caulk a sewer pipe, it is necessary to determine whether a sealant or sealant is used to connect cast iron pipes to each other.

Chasing the pipe on the seal begins with the fact that it is tedious to beat off the waterproofing layer with a special rubberized hammer. After that, the joint is loosened, the camboca is removed, the sewer pipe is removed from the socket.
The caulking of the pipe on the sealant is performed a little differently. First you need to tap the joint, then remove the waterproofing layer, burn the sealant with a blowtorch. Once the pipe has cooled, it can be easily removed from the socket.

Note! After the caulking has been done and the damaged part of the cast iron sewer pipe has been removed, it is not recommended to install a replacement from that material. It is better to replace the cast iron pipe with a plastic counterpart. Plastic is in no way inferior to cast iron, but is a lighter and cheaper material, and besides, it does not corrode.

Methods for caulking sewer pipes

When installing a sewer system using cast-iron pipes, which are connected in a “bell” way, voids are formed at the joints, which can adversely affect the functioning of the sewer. In order for the connection to be reliable and durable, caulking of sewer pipes is required. It can be made using different materials. Most often it is cement and asbestos cement.

Use of cement mortar

First you need to mount the resin seal in its place. The tarred rope must be tamped into the hole of the sewer pipe and the socket. After the formation of the first ring of the tourniquet, we overlap its end from above so that it cannot penetrate the pipe in any way.

Methods for caulking sewer pipes

Now you need to prepare the cement mortar. To do this, cement is poured with water, in a ratio of 9: 1. As soon as the solution cools down a bit, they need to fill in the junction. Using a hammer, we drive the cement into the joint. For a better fight between the solution and the tarred rope, it is necessary to cover the cemented joint with a damp cloth afterward.

Note! If you use extended caulking and embossing in the course of work, the installation speed will increase by 30%. If caulking is performed during the cold season, the cement mortar is prepared not in cold, but in hot water. After completing the work, it is necessary to take care of the insulation of the joints.

The use of asbestos cement

The asbestos-cement mixture is also suitable for performing work on the sewer cast-iron pipe. In this case, the workflow will be slightly different.

Chasing pipes

First you need to make a solution. To do this, in a container, mix a mixture of dry asbestos fiber with cement. For one part of the mixture you need to take two parts of cement.
Now the resulting mixture needs to be slightly diluted with water so that it adds 10-12% of the mass, stir until smooth.

There is no fundamental difference in how the sockets of sewer pipes are caulked with an asbestos-cement mixture or cement mortar.

Note! Cast iron is a rather fragile material despite all its technical characteristics. During operation, it is exposed to water, solid waste, aggressive chemicals. In order to extend the life and improve the quality of service of sewer pipes made of this material, it is necessary to caulk the connections.

Before you start doing the work with your own hands, you need to familiarize yourself with all the nuances of chasing. The procedure is quite complicated and time consuming. Without even the slightest experience in carrying out construction work, you should not even take on the execution of caulking.

In the days of the Soviet Union, it was cast-iron pipes that were used for the manufacture of sewers. They have many advantages, such as long service life and high reliability. However, at the same time, they do not have flexibility, which is why they are overgrown with plaque from the inside, and are also susceptible to corrosion. Therefore, in our time, products made of polymeric materials are increasingly used. But, despite this, cast-iron pipelines still remain in most houses, because most buildings were built several decades ago. Therefore, gradually people begin to independently replace the failed sections. At the same time, they are faced with the fact that the pipes are minted. You should study the question of how to mint a pipe with your own hands.

To emboss a cast-iron pipe, people usually invite a professional. However, such work can be done by hand. At the same time, it is very important to act carefully.

The caulking of pipes is the separation of the elements of the sewer pipeline. This process requires care and accuracy, but it is quite possible to carry it out on your own.

Chasing sewer sockets requires careful preparation. The main stages of this process:

First of all, you need to prepare the tools. We are talking about a grinder, a hacksaw, a simple and rubber hammer, a chisel, an adjustable wrench, screwdrivers, pliers, a respirator and a blowtorch.
You need to open the valves. This will protect against the flow of fluid through the pipe with which the work is being done.
You also need to ask the neighbors not to use the water supply and sewerage. Especially seriously should talk about the use of the toilet. After all, this can lead to the fact that the drains will fall right on your head.
You will have to dismantle the toilet, sink, or the system whose sewer part you are going to mint.

Chasing pipes can only be done when you have completed all the stages of preparation for this process. Otherwise, you simply will not be able to cope with this process.

Cutting off an unnecessary pipe section

If you want to repair or replace the sewer or water pipe system, then you need to carry out each step in stages. After all, this process is different in that in case of failure, you can damage the sewer system of your neighbors.

Chasing the toilet outlet is difficult because in order to dismantle this element of plumbing, it will have to be broken. You won't be able to take it off completely.

Before you start caulking the sewer system, you must eliminate the damaged area. In this case, there are several recommendations.

The first stage of chasing a cast-iron sewer:

The end pipe is very easy to replace. Here you will not have to do any special work, except for the chasing itself.
If you want to replace the central part of the sewer riser, then this will be more difficult. This is where you need to make a cut.
For four centimeters from the common pipe, make an incision in a circle. Use a protective mask, goggles and gloves.
The unfinished part is carefully finished with a hacksaw. It is not recommended to hit the pipe with a hammer. The fact is that the fragility of the metal is unpredictable, upon impact, instead of a damaged pipe, the necessary part may burst, and in this case the next element will have to be changed.
Tie a large piece of rags to the pipe, then put it into it. This is necessary so that foreign objects do not get into the riser.
Now they go down some distance from the cut along the damaged element so that 20-30 centimeters remain to the place of caulking, and make a new cut. Carefully remove the cut piece.
The hole in the pipe is again closed with rags.

When cutting a pipe, all actions must be done very carefully. Do not cut the product flush, as this increases the danger of work.

It is very convenient to do this work in tandem with a friend. Then one person will be able to hold the element being cut off, and the other to cut.

Methods for caulking pipes and options for its neutralization

Chasing a pipe, that is, connecting its elements, can be done in three ways. However, each of them requires its own specific approach.

Nowadays, in order to connect the elements, it is not at all necessary to mint a pipe. This can be done using a special coupling-adapter. Moreover, with such an element it is possible to connect pipes from various materials, for example, cast iron and plastic.

Chasing pipes can be made from different materials. Various caulking of pipes and ways to eliminate it:

It will be easiest to separate the elements if they were minted with a heel. This is a rope that is wound around pipes and rammed. To check if this method has been used, you need to hit the bell several times with a rubber mallet, and then try to loosen it. If the pipe lends itself, then, most likely, it was the cable that was used. In this case, it is necessary to open the top layer of the rope with a screwdriver, find its end and pull it out. Throughout the work, it is necessary to carefully loosen the pipe. Shake it until you can pull out the necessary element. If the cable was covered with cement mortar on top, then it must first be knocked down. To do this, a screwdriver is placed on it at an angle, which taps.
In Soviet times, the cable was used infrequently. Sulfur was much more common. In this case, you will have to do quite a dangerous job. For her, you will definitely need to wear a gas mask, because sulfur fumes will be released, which are extremely poisonous. It is also necessary to ventilate the apartment. So, it is necessary to melt the sulfur with a blowtorch so that it acquires a liquid state. When heating, it is periodically necessary to tap the pipe until a noticeable stir appears. When the pipe itself heats up, it will need to be taken with an adjustable wrench and pulled towards you with effort. This will release the required element.

This is how pipes are caulked. It is worth noting that the option with gray is the most dangerous. Therefore, if you do not have a gas mask or a special construction respirator, then it is better not to start at all.

To dismantle the pipe from cast iron correctly, it is necessary to take into account all the rules of caution.

Helpful Hints:

Don't work alone. It is not safe. It's best if a friend helps.
If the pipes were minted with sulfur, then after removing the necessary element from the system, sulfur residues must be wiped off the pipe.
Do not use an iron mallet to chisel pipes. It can lead to the formation of cracks throughout the system. If there is no rubber, then you can use a wooden tool.

Such simple rules will help to produce chasing without trouble.

It is difficult to mint a cast-iron sewer with your own hands, but it is possible. However, keep in mind that even with perfectly correct execution, a non-professional will take several times more time to do this work than a master. Dare!

In the case of replacing plumbing equipment such as a toilet bowl or a sewer riser, it is necessary to very carefully perform the procedure for caulking cast-iron pipes in the first place. With strict observance of all the rules for caulking or caulking connected sewer pipes, it is possible to do such work with your own hands.

The embossing is done in the following order

First, it is necessary to very carefully, without undue effort, tap the socket part of the sewer pipe with a hammer in order to avoid complete replacement of the riser section in case of cracking.
By slightly loosening the dismantled pipe, it is necessary to make sure that the bell can move and rotate freely on the sides and can be gradually released from the chasing with a cable. Now you can dismantle it in the following order:
in all directions it is necessary to loosen the socket;
gradually pull out the rope and pick it with a thin straight object with a screwdriver or some kind of rod;
the rope must be firmly grasped with pliers;
continue to slowly loosen it and gently pull the rope.

The ineffectual tapping and immobility of the bell indicate that the chasing was performed using a special sulfur filling. In this case, it is necessary to perform the direct burnout procedure according to the following scheme:

It is necessary to carefully heat the socket section of the cast-iron pipe in a circle with a blowtorch or gas burner, while you must not forget to continue loosening, unscrewing and tapping the socket part of the pipe;

After it has moved from the place of the old embedment, it is necessary to continue to loosen it with the help of some tool, an adjustable wrench, etc.
After dismantling, it is necessary to carefully clean with any cutting tool a knife, chisel or chisel. When cleaning, special attention should be paid to the socket seat, on which sealing rubber will subsequently be installed.
Place greased into the cleaned socket. Install the required assembly in the seal.

Coin options

In order to firmly and hermetically construct a sewer system from cast-iron pipelines and parts for it, it is imperative to provide for the correct option for sealing the resulting gap filling the void between the pipes, which is always shown when the inner socket part of the pipe is butt-joined with its outer surface part.
It should be noted that the choice of the necessary consumables, the appropriate special tools for sealing work and the amount of time spent depend on the method of sealing the connection of cast-iron pipes. It is proposed to consider the currently existing two options for caulking cast iron joints.
1. The first option is the use of cement mortar

The procedure for sealing pipe joints with cement mortar consists of the following steps:
In the resulting gap between the pipes, it is necessary to lay a special tarred sealant. To make such a gasket, a conventional tourniquet pre-tarred in a special solution is used, which is driven into the gap formed between the pipe and the socket to a depth equal to 2/3 of the gap space. After creating the first sealing ring, it is necessary to put the end of the rope (tow) on top of this ring so that it does not end up inside the pipe being installed.
Next, it is necessary to seal the remaining part of the depth of the gap (1/3 of the remaining space) between the pipes with the prepared mortar from cement, already compacted with a tarred tourniquet in front of this. In order to increase the density and reliability of the caulking of the joints, it is required to use a special coinage together with a hammer, with which it is necessary to carefully tamp the cement mortar. The moment of the end of caulking is considered to be the beginning of rebounds of the caulking from the clogged cement seal. In order to obtain a high-quality setting of the cement mortar, it is necessary to cover the compacted area with a wet cloth, for example, gauze.
In order to prepare a cement mortar, you will need to purchase cement grade 300400. It must be mixed with water in a ratio of 9/1.
You can increase the speed of work when caulking with the help of special tools such as broadened caulking and caulking. At the same time, the entire process is accelerated by 30%.
If the work is carried out in winter at low ambient temperatures, then the cement mortar in this case must be kneaded in heated water, and it is also necessary to perform temporary insulation of the pipe joint sealed with cement.

2. The second option is the use of asbestos cement

This process is slightly different from the previous one and has its own procedure:
It is necessary to knead the asbestos fiber in a dry state with cement in a ratio of 1/2, respectively;
The collected dry mix must be kneaded in water before being used as a seal between pipes. The volume of water in the solution should be about 1012% of the total volume of the prepared mixture.
The process of caulking the gap between the pipes is carried out in a similar way in accordance with the established procedure for the first option for sealing the joints.

Such a procedure as chasing or chasing connections between has its own difficulties and difficulties with its own nuances and tricks. Therefore, in order to achieve a positive result with such laborious work, it is recommended to seek help from knowledgeable and experienced professionals. In this case, there is a guarantee that you can get rid of unnecessary hassle and costs during an unplanned replacement of risers as a result of, for example, unsuccessful tapping of the socket part of the sewer pipe with a hammer.