How to choose and correctly install pipes for sewage in the

Carrying out a major overhaul in your own apartment, it makes sense to think about the complete or partial replacement of the internal sewer system. During the construction of houses of the old housing stock, for the arrangement of sewage, cast-iron pipes and fittings were used, which currently do not meet modern quality standards.

In addition, due to physical wear and tear, such systems cannot guarantee many years of trouble-free operation, so timely replacement of sewage pipes in the apartment with your own hands will help in the future to avoid unpleasant surprises.

Independent installation of the internal sewerage

In order to study this issue in detail, this article will discuss the main aspects of the independent installation of a modern sewage system inside a residential apartment.

Also here will be presented a detailed instruction, which describes the main technological stages of installation of internal wiring and connecting plumbing fixtures to a common sewer network.

Basic principles of reliable operation

In modern private houses and residential apartments, in most cases, sewer systems of free-flow type are used, that is, the sewage in them moves by gravity, under the action of gravity. For this reason, each section of the apartment network should have a natural slope downward from the point of dismantling to the point of entry of the drain collector into the common vertical riser.

For reliable operation and uninterrupted operation of the entire sewer network, each of its sections must meet certain requirements.

1. Flared and threaded connections of all elements must be absolutely tight, without visible traces of leaks and mechanical damage.
2. It is recommended to install a revision hatch with a hermetically closed lid on the receiving manifold. Thanks to this, the cleaning of sewage pipes in the apartment with their own hands and the further maintenance of the system will be significantly simplified.

1. Drain each sanitary appliance (including washing machine and dishwasher) must be equipped with a separate water seal.
2. All horizontal sections of the system should have a natural slope in the direction of the receiving manifold, and the receiving collector - in the direction of the total vertical riser, with a height difference of 2% to 5%.
3. If for any reason the slope has a height difference of more than 5%, for its correction it is necessary to install a vertical section at an angle of 90 ° to the horizon and a horizontal section with a height difference of 2%.
4. The drain collector of apartments located below the third floor should be equipped with a check valve that will prevent sewage from entering the apartment in the event of a return flow of wastewater.

   Tip! To equalize the pressure in the system during draining, and to prevent the breaks in the traps, a common vertical riser at the highest point must have a direct connection with the atmosphere.

Selection of materials

Currently, there are a huge number of all kinds of pipes and fittings, but when choosing plumbing products for your apartment, you should prefer pipes and fittings made of rigid polyvinyl chloride or polypropylene.

These materials fully comply with sanitary and construction standards, have a long service life, are resistant to hot water, and products from them are produced in a large range of products.

Before you change the sewer pipes in the apartment, for the correct selection and purchase of materials it is recommended to familiarize yourself with useful information.

1. Before buying materials and components, it is necessary to draw up a detailed diagram of a home sewage system with exact dimensions and an indication of all plumbing fixtures.
2. To make it convenient to perform maintenance and repair of sewage pipes in the apartment, the entire system must be assembled from individual elements at the socket or threaded connections.
3. Each pipe should be fixed to the wall at least at two points, so when you purchase you need to pick up the appropriate hardware.

1. When cornering the pipe, the use of connecting elements rotated at 90 ° should be avoided. In the case of a T-shaped joint, it is better to dock the pipes at an angle of 45 ° or 35 °, and to get a right angle, use two 45 ° fittings.

1. When installing home networks, the diameter of sewer pipes in an apartment of 50 mm or 110 mm is most often used; however, in order to accurately select the appropriate size, you can use the data from the table.

   Note! Plastic pipes have a lower sound absorption than cast iron, so for a comfortable stay, you may need additional sound insulation of sewage pipes in the apartment with the help of special heat and sound insulation materials.

Installation Features

Getting to the execution of work, first of all, you need to dismantle the old sewer system. When dismantling, you can use all the available tools (grinder, chisel, crowbar), since it is no longer useful anywhere.

The only place where care should be taken is to connect a vertical riser with a drain header. The spout of a vertical riser is usually made of gray cast iron, therefore it can crack or splinter into sharp jerks or strong blows.

Having completely removed the remnants of the old sewage system, you can proceed to the installation of a new system.

You need to know that the replacement of sewage pipes in the apartment is always performed from the bottom up, that is, from the vertical riser to the sanitary appliances.

1. Clean the spout of the vertical riser from rust and residual solution, lubricate inside with a silicone sealant, then insert the connecting rubber sleeve into it.
2. Insert the joint of the common drain manifold into the joint seal on the silicone sealant, while observing the required angle of inclination.
3. According to the scheme, in the right places to connect the drain manifold taps and wiring pipes of the required diameter to connect all sanitary appliances.
4. At the end points of the diluted pipes, install hydraulic locks or plumbing siphons.
5. Installation of all plumbing communications with your own hands must be carried out in such a way that the socket is necessarily directed against the flow of wastewater.

   Tip! If a non-return valve is present in the system, it is installed between the horizontal receiving manifold and the common vertical riser.

Conclusion

After reading this article, it becomes clear that the self-replacement of indoor sewage, a responsible matter, but quite doable for any home wizard.

For more information on this issue, you can watch the video in this article or read similar materials on this subject on our website.