All household drains of numerous apartment sanitary devices are discharged through sewer pipes. The developers undertake their installation, but homeowners have to deal with the repair and replacement of utilities. Sometimes a new building requires laying sewers from scratch. The installation work can be entrusted to plumbers, but if there is free time and a desire to save money, then the sewage system in the apartment with its own hands is also mounted on its own. The main thing is to know how to carry out the pipe installation and to connect the plumbing.
Sewage scheme for an apartment
Before distributing pipes and plumbing installation, it is necessary to plan the sewer system. The scheme includes the following elements:
If you are not planning to connect new points, then you can not change the existing sewer layout. This will simplify the calculation of the required material. The length of all pipes is measured in situ; if they pass through a wall, then the size of each section will be required.
The diameter of the sewer pipes is not chosen arbitrarily, there are recommendations for their size :
A 32 mm pipe is sometimes used to connect some devices.
The slope also does not have to be chosen independently, pipes with a diameter of up to 50 mm are arranged at an angle of 3º, and 110 mm are set at 2º. This means that on a plot of 1 meter the slope changes by 3 and 2 cm, respectively. The correct location of the line ensures the movement of water in the self-flowing system.
Plastic sewer pipes
Sewerage in the apartment is made of plastic , cast iron pipes work harder. Polymeric pipes of three types are used: polyvinyl chloride, propylene and polyethylene. These products are similar in appearance and properties:
Adapters to sewer pipes
Special elements are required to connect pipes: outlets, tees , transitions from metal cuffs. It is better to purchase all the necessary material from one manufacturer, this guarantees the accuracy of the coincidence of all diameters. Sealing the joints will require silicone grease, it is also bought in advance. So, for work we will need:
The sewage system is started from the riser. This is the most difficult section, it runs through drains from neighboring apartments, so for the time of pipe replacement, neighbors should be asked not to use the sewer for some time. Dismantling is as follows:
Having completed the installation of the riser, proceed to the layout.
All sanitary fixtures are disconnected from pipes to be dismantled. After removing the old system, the layout of the new highway is marked.When installing the pipeline, it is preferable to straight sections, bends and turns, which provoke blockages, should be the minimum number. Proper installation of sewers with a small number of connections and sustained tilt angle ensures self-cleaning of the system. With each flush, the stream carries the remainder of the previous stream.
You can organize the marking of the slope of the pipes using a line on the wall or a cord attached to the highest and lowest point of the sewer system. According to this marking, the installation location of the fastener is determined, for pipes Ø 50 mm, clamps are put through 50 cm. To relieve tension in the pipes, two types of fastening must be combined:
Connecting plastic sewers
Before installing the pipes, you must remove the chamfer and clean it edges so that there is no burrs. The inner surface of the pipe and fitting should be clean and dry. When making the connection, the end of the pipe is inserted into the socket until it is tightly abutted. To enhance the tightness of the rubber ring is applied silicone grease. Beaters should be located along the water flow. During operation of the sewage system, temperature deformation of the plastic occurs. So that the seam does not lose tightness when expanding the material, a gap of 1 cm is left. This is done like this: the pipe is inserted into the socket to the stop, then a 10 mm mark is made and the part is retracted back to this mark.
In order not to have to redo the finished system, it is worth making a trial installation without tight connections. Once you are sure that the installation is correct and that all parts are present, you can complete the assembly.
Pipe marking before cutting
The leakage of the collected sewage should be repaired
After installation, you should check the tightness of the assembled system to all parts of the layout of the apartment and at the junction with the riser. The reliability of the docking of the new riser with the neighbor pipe is checked after the water is drained in the upper apartment. To check, water is drawn into the bathroom, and then the stopper is removed, both taps are opened in the kitchen, and the toilet is drained. Reliability of joints is easy to assess - they should all be dry.
This video shows how to replace the residential cast-iron sewage wiring in stalinka on plastic:
Sewer pipes and fittings
Installation of plastic sewer pipes in the bathroom
Replacing the riser
Connection of cast iron with plastic
Input of a plastic pipe into the tee of a cast-iron riser
Replacing cast iron with plastic
Example of rotten cast-iron sewage