As you know, the sewer network is designed to drain used water for domestic purposes. Internal sewage is a network of pipelines that are connected to sinks, toilets, bathtubs and other equipment. To organize such networks, cast iron or plastic pipes, as well as their combinations, are traditionally used. Next, replacement of sewage using PVC pipes will be considered. The outlet pipes from the sinks are 50 millimeters in diameter, and 100 millimeters from the toilets.
It is worth saying that if the plastic sewage began to leak after 5, not 50 years, then this is due solely to errors in its replacement.
If it happened that the plastic sewage did not flow after 50 years, but after only 5, then this is usually not the fault of the pipes, but the errors associated with the installation process. Since the installation technology involves the observance of very specific rules, pipelines assembled with errors cannot last for a long time. Before installing the pipes, they should be washed out from the applied dirt and dust, then grease the seal with Vaseline, and then remove the small chamfer on the pipe that is introduced.
So, the replacement of sewers requires compliance with very specific rules. Typically, polymer pipes are made of polyethylene, polypropylene or PVC. The most common are the second and third species. Moreover, for each material there are certain standards, since they have different characteristics, and here the wall thickness acts as the main parameter. In most cases, water enters the sewer, the temperature of which does not exceed 95 degrees, so the pipes should be designed for use in this mode. Despite the fact that polypropylene is very resistant to temperature influences, they have a higher rate of linear expansion, which is not very good for sewer pipes.
Replacing the sewage system begins only after all the necessary gates are completed, grooves in the walls and floors, openings are made, and work associated with an open fire is completed. Installation usually begins with the release, after which the riser is assembled from the bottom up and the bends are installed. The bells are usually directed towards the flow, and it is necessary to observe the slopes as strictly as possible.
Replacement of sewer pipes should be carried out with particular attention to the supports and fastening of PVC pipes. Supports should be placed on open pipes as often as possible, for example, on horizontal pipes - after 40 centimeters, and on vertical pipes - after 100 (usually they are placed under the base of the socket). A prerequisite is the use of plastic or rubber gaskets between the pipe and the metal clamps of the supports. Replacing the sewer riser also requires special attention, as well as compliance with established norms and rules that do not allow the entire structure to deform due to temperature differences.
In places where pipes penetrate various building structures, they need to be wrapped in two or three layers of tulle or glassine, and to cover the entire depth of the hole with cement. After finishing work, you can install plumbing equipment.
Now you know how to replace the sewer.