If it is necessary to equip the treatment plant system in the area, you can use a septic tank that has plastic containers as part of this. This option is most suitable for the case when the volume of wastewater is not so large. For work, you can use old barrels, but you must make sure that they do not have leaks. A septic tank made of plastic is considered the most preferable over a metal one. This is due to the fact that the latter option crashes faster, the material is destroyed, making the system unusable. It should be noted that such a cleaning system can be used exclusively for a small amount of effluent. It is usually used for country houses, as well as baths.
Features of the work
Septic tanks made of plastic suggest the need for containers, the volume of which varies from 200 to 250 liters. If you want to save, then you can use barrels that were previously used for various purposes. To carry out such work yourself is quite simple. To do this, you do not have to attract specialists and rent construction equipment. The disadvantage in this case is the limited volume of cameras. It is important to take into account the norms that indicate that a septic tank should contain such a volume of effluent that forms in the house in three days.
Seat selection
If you decide to mount a septic tank made of plastic, then you will need to initially choose a place. It is necessary to take into account the requirement that the system should be as far away as possible from the well or well from which drinking water is extracted. Among other things, the cleaning system must be removed from the foundation of a residential building by 5 meters. From other structures, such as garages, it should be removed by 1 meter.
Installation diagram
If the suburban area on which the described system is installed will be used by three vacationers, it is permissible to prefer the following scheme. It involves the installation of barrels that are mounted in series. The number of tanks is limited to three, the latter should be devoid of a bottom, this is necessary in order to provide the well with filtration capabilities. When mounting a septic tank made of plastic, you must position the barrels at a different level in relation to each other. Thus, each container should be 10 cm lower than the previous one.
Connect the compartments to each other with overflow pipes. The pipe that will enter the system should be 10 cm higher relative to the pipe that exits the system. Under the first two tanks that are used as settlers, a sand base should be equipped, it should have a thickness of 10 cm. Under the last barrel, which is bottomless, you need to make a crushed stone pillow, whose thickness is 30 cm. Next, sand is placed in 50 centimeters . This layer is intended for the final purification of water, which will then enter the soil. If groundwater is located on the territory, and there is no possibility to mount a filter well , then it is necessary to equip the filtration fields.
Preparation of materials
If you decide to build a septic tank out of plastic, then you need to prepare barrels. Their number will depend on whether it is planned to supplement the system with a filtration well. If such an element is in the system, the barrels should be, as already mentioned, 3. Otherwise, you need to stock up only two barrels. The last of the three should be bottomless. Fine-grained crushed stone is required, the dimensions of individual elements of which can vary from 1.8 to 3.5 cm. Get geotextiles, as well as pipes and connecting corners. As for the penultimate component, it is important to buy sewer pipes , the diameter of which is 110 millimeters. You will also need drainage pipes, which are used for construction and filtration.
Septic tank installation
When a septic tank made of plastic is equipped, it will be necessary to prepare barrels. To do this, a hole is made in the first of them, which is necessary for connecting the outlet and outlet pipes. In the first container, it is necessary to make a hole for the incoming pipe, retreating 20 cm from the top cover. The outlet should be located on the opposite side, it should be shifted 10 cm down relative to the first. If you decide to install a septic tank made of plastic with your own hands, then in the first container you need to make a hole for the ventilation riser. The cover of the first barrel should have a removable structure. This is due to the fact that it is in this compartment that the largest amount of solid waste will accumulate, which will periodically need to be removed.
Features of the work
You can buy ready-made septic tanks made of plastic, but it will be much cheaper to find used barrels and install them. The second container also needs to be prepared, for this, holes for the incoming pipe should be made in it, placing it 20 centimeters from the top cover. The outlet pipe will be located on the opposite side, it should be 10 cm higher with respect to the hole of one pipe. If it is planned to connect drainage pipes to the tank that go to the filtration fields, then it is preferable to make two holes in it, which will be located at an angle of 45 degrees with respect to each other.
Professional advice
After you find containers for a septic tank made of plastic, you will need to purchase a waterproofing composition. It will be needed in the process of connecting pipes to tanks. Silicone should not be used for this.
Excavation
It is important to prepare pits before starting the installation of the tank. They should be slightly larger in size than the barrels themselves. The distance between the walls of the pit and the septic tank should be equal to 25 centimeters around the perimeter. The bottom of the pit is well compacted, after which sand is laid, the layer thickness should be equal to 10 cm. If possible, it is recommended to fill the bottom of the pit with concrete mortar. In the mixture, embedded steel elements that have loops are installed, with the help of this addition it will be possible to fix the barrels.
What else does the master need to know
If the cleaning system is installed with the expectation that the septic tank will work continuously, it is necessary to fix the tanks on the concrete slab using bandage belts. If this recommendation is neglected, then during the flood period barrels can be pushed out, which will cause the destruction of the sewage system.
Installation of a septic tank
At the next stage, barrels are installed, pipes are connected. Next, backfilling is carried out, while sand and dry cement powder should be used, these ingredients are pre-mixed with each other. This manipulation will protect the system from damage during seasonal soil movements. It is necessary to carry out backfill very carefully, while ensuring that the joints are not damaged. Otherwise, it will be necessary to repair septic tanks made of plastic, which sometimes implies the need to replace barrels.
After it is filled up with 30 cm, the mixture must be well sealed around the perimeter. After falling asleep the next layer. In parallel with this, the tanks are filled with water. This will eliminate the deformation processes of plastic.
Filtration well
For the filtration well, a container that was previously deprived of the bottom is used. An additional hole is made in the lower part of the tank. Before installation, sand is poured, the thickness of the layer should be 50 cm. At the next stage, crushed stone is poured, this layer has a thickness of 30 cm. After installing the barrel, 1/3 of the height is filled with crushed stone.
Which septic tank to choose
Quite often, modern consumers compare septic tanks made of concrete and plastic. It is worth noting that the latter option is considered the most preferable. There are several reasons for this. Among others, it can be distinguished that concrete is not completely tight. After installation, the surface of the container of this kind must be additionally sealed. Among other things, in the process of work it will be necessary to use heavy equipment. The work will be more costly financially, and you will have to spend much more effort, which is very undesirable.