Replacement sewer pipe: the stages of work, the necessary materials

Any sewerage will eventually require repair. However, the rapid replacement of individual elements can sometimes not solve the problem. Restoring functionality is sometimes quite difficult, but the replacement of sewer pipes will allow you to get out of the situation.

The point here is not even in the quality of materials, but in the operational process, because daily consumers drain tens of liters of waste that can negatively affect the functionality of the system. Hot water is replaced by ice flow, and soap solution - greasy residues from washing dishes. That's why, no matter how reliable sewerage in the apartment, sooner or later the question of its replacement will arise in front of every owner of the apartment.

What you need to know before starting work

In order to determine the materials, it is necessary to take into account all points of water intake. It is important to calculate everything to which the sewer pipes that require replacement are listed, namely:

• Bathroom;
• toilet;
• A sink in the kitchen;
• Washing in the bathroom;
• Washing machine and dishwasher.

Assistant in this case will be a scheme that you can depict on a sheet of paper. The plan will allow you to understand how to assemble the circuit, and also to determine what will be required for the work, these can be additional devices, as well as pipes, the length and number of which you must determine at this stage.

As for the diameter of the toilet pipe, this parameter is 100 mm. For other devices, the diameter is 50 mm. For the toilet, experts recommend buying a corrugated pipe. Install it much easier. Before you start replacing the sewer pipes, you should know that the diameter of the siphon corrugation for the washbasins and the bathroom can be equal to a limit of 32 to 50 mm. While this parameter for the washing machine is equal to the figure from 20 to 25 mm.

Rubber cuffs for the toilet can have a diameter of 126/110 mm. For other pipes, the diameter of the cuffs can be 50/32 or 50/40 mm. The pipe, where the water from the washing machine will be drained, must be raised 500 mm above the floor surface. The system can be assembled much easier and faster if you use a silicone sealant.

Methods of connecting sewer pipes

If you decide to replace the sewer pipes in the bathroom, you must first choose how to connect the products. To do this, home masters most often use rubber couplings. However, this method is most preferable for cast iron pipes.

Plastic products are usually joined by a bell mouth. The end of the pipe for this is inserted into the enlarged part of the other. For sealing, a rubber ring or seal can be used. In order to get a plastic pipe of the required length, you need to use a hacksaw. To facilitate installation from one edge of the pipe, the chamfer should be removed. If this is not done, the sealing collar may be damaged.

Material selection

If you decide to replace the sewer plastic pipes, then you should think about which material to choose. It can be metal or ceramics. The latter option is quite expensive. Among the advantages of such systems is their resistance to aggressive environments. But polymeric products have smooth surfaces, so they prevent the formation of blockages and do not overgrow with time. They can be made of polyvinyl chloride or polypropylene.

The last option is considered the most optimal for internal sewerage. Such pipes are easy to lay, they are durable and resistant to high temperatures. Replacement of sewer pipes at home can be conducted on PVC products. They are UV-resistant and strong enough. But when burning and heating, they begin to release harmful substances. Among other things, polyvinyl chloride is not very resistant to aggressive media, but it is suitable for sewage in an apartment.

Is it worth using a metal pipe for replacement

Iron pipe and steel are used as material for metal pipes. These products are inexpensive. Steel pipes are resistant to high temperatures and are strong. They are now used to transport industrial waste. But steel products have an impressive weight and are susceptible to corrosion. Therefore, use them in the apartment is not worth it.

Cast iron pipes are more expensive than others. But they are resistant to corrosion. Use them for sewerage in the apartment is possible, but only if you are not confused by the reduced patency of pipes with time, as well as the complexity of their installation because of their high weight. But cast-iron pipes have a long service life and high strength.

Preparation of tools

Before replacing the sewer pipes, you should take care of the availability of some tools, among them:

• Perforator;
• chisel;
• a hammer;
• hacksaw;
• Mounting gun;
• Adjustable wrench;
• Screwdrivers;
• a hammer.

The perforator can be replaced with a drill, and the hacksaw for metal - a Bulgarian.

Dismantling of pipes

At the first stage of the sewage system upgrade, it is necessary to dismantle the pipes. The work should be carried out in stages. First, the water supply is cut off, after the hose that goes to the toilet tank drain, it must be disconnected. Use a wrench for this. Next, the master has to dismantle the toilet. Bolts, which it strengthens to the floor, it is necessary to unscrew.

The room is released: from it it is necessary to take out everything that can interfere with the work, such as:

• Washer;
• washing;
• bidet.

The old sewer system is dismantled. Those cast-iron pipes, which are located some distance from the riser, you can break with a hammer, because this material is fragile. The master will have to dismantle the pipes that are adjacent to the riser.

Replacement of sewer pipes involves careful dismantling of elements that move away from the riser. To do this, using a bulgary, the pipe cuts off a 10 cm spigot from the spigot of the riser. The remaining part can be taken out, for this it should be shaken in the socket. The remainder of the pipe falls easily. If he is firmly ensconced, then he will have to spend more time and energy.

Along the length of the pipe it is necessary to make a few notches with a Bulgarian, retreating between notches 20 mm. By tapping with a hammer on the chisel, you can split the pipe, which is stuck in the tee. This method usually allows you to get rid of old pipes. The socket of the tee is cleaned. Before installing a new cuff, it is necessary to remove old grease residues that might prevent the installation of the new system.

Installation of new pipes

If you decide to replace sewer pipes from pig iron to plastic, then the next step is to start installing the new system. As soon as the new rubber cuff is in the prepared socket of the tee, it can be fixed, and then you should start installing plastic products. The most important step is the installation of the toilet. It should be connected to a sewage system using a 110 mm pipe.

Then you need to make a smooth transition to the pipes by 50 mm. Adapter to such a diameter should not be immediately installed. Use the bridge 100 mm correctly. Then go to 50 mm, fixing the joints and observing the slope to 5 ° in the direction of draining.

When replacing sewer pipes, you should avoid a 90 ° transition. An excellent option would be to use two angles at 45 °. When installing the system inside the apartment, there is usually no need for welding. The assembly can be carried out by inserting the elements into each other, using gaskets for good tightness. However, for complete certainty, a silicone sealant should be used that will connect the parts of the structure.

Recommendations for work

When the part of the sewer pipe is replaced, you will have to mark with a ruler and a square on the vertical surfaces a pipe fixing line. At the next stage, the system is selected from pipes of the required length using tees for plumbing.

The fixing points for the clamps are applied to the wall. Under them it is necessary to drill holes. Elements are installed and attached to the wall. A PVC pipe should be connected to the sewer pipe. It should be increased with the help of pipes of the necessary length to the next point of water intake.

The whole system is fixed to the wall with the help of mounting clamps. The joints can be sealed with cuffs. It is important to check the tightness of the system. Only after plumbing is connected. Not all owners use an open installation method when replacing cast-iron sewer pipes with plastic pipes. Modern interiors provide for a closed installation technique. To do this, the system hides in the wall or floor. In the surfaces for this, holes of the required depth are shrouded so that the pipes are completely seated in them. Then a podium is built. At the final stage, a decorative box is installed, it can be made from plasterboard. Subsequently, it is covered with tiles.

Conclusion

Replacement of sewage pipes must be approached with high responsibility. Dismantling the old system is quite simple, but to put new pipes in place, ensuring tightness, is not always easy. Replacement of pipes is fraught with many nuances, at each stage of work it is necessary to comply with its rules, from the dismantling of the old pipeline and ending with the connection of the system.