Installation of septic tank

For a comfortable stay in any house or at the dacha, it is necessary to install a water supply system, but in this case the question arises about the disposal of wastewater. A septic tank comes to the rescue of this problem. Such a device can not only collect all drains from the sewage system, but also to clean them. A fairly common type of septic tank is the "Tank" system. Such devices are easy to operate and are inexpensive. In this article you will learn how to install a septic tank with your own hands.

A little about the design itself

The septic tank is made in the form of a cast container of durable polymeric material. Inside it there are three chambers in which the wastewater treatment takes place. In the first section, the water settles with precipitation of solid fractions. The second chamber serves to clean the waste with the help of microorganisms. Then, the already clarified water enters the biofilter, where it is cleaned to the level determined by the manufacturer (as a rule, this is 75%).

In addition, the septic tank is equipped with infiltration. It is necessary to increase the level of cleaning with the help of soil filters. The design of the infiltration unit can be purchased together with the wastewater treatment system.

The septic tank can be issued in various modifications. Depending on the volume of waste in the household, you can buy a device from 0.75 to 1.2 m³ volume (there are more productive models).

Depending on the size of the septic tank, their weight also changes, but in any case the installation of the device does not require the engagement of special equipment (the weight of the septic tank with a volume of 1200 l is 150 kg).

We carry out installation work

Installing a sewage treatment plant model "Tank" will not cause much difficulty. The first step is to choose the right place. It should be close to the sewer exit from the house and at the same time comply with sanitary standards. Further work will be performed in the following sequence:

1. A pit is being dug in the chosen place under a septic tank, its dimensions should exceed the dimensions of the device by 25–30 cm. From the sewer exit from the house to the pit the pipe trench is being dug, while it is necessary to observe the slope towards the septic tank.
2. At the bottom of the pit a sand cushion is constructed, 20 cm thick. If the groundwater comes close to the surface, then a septic tank can “float” during the flood, to avoid this, it is necessary to fix the device. To do this, instead of a sand cushion at the bottom, a sand-cement screed of the same thickness is poured or a concrete slab is placed.
3. The next step is to lower the septic tank into the pit. This should be done carefully, so as not to hit the body. If a concrete slab (or sand-cement screed) is installed at the bottom, then the device is attached to it using sling or nylon belts.
4. Further, pipes are laid from the sewer exit from the house to the septic tank inlet, and they are connected. How to do this work can be found by viewing the video.
5. We carry out the backfilling of the pit. For these purposes, they often use excavated soil, previously sifted from large stones and pieces of earth. Many experts advise to use for backfilling a mixture of sand and dry cement in the ratio of 5 to 1. This method will help secure the device in its place. Backfilling of the pit is carried out gradually by 20–30 cm, each layer must be compacted. During these works, water is poured into the septic tank, while its level should exceed the level of filling by 20 cm. From above, the entire area can be covered with a layer of turf, leaving space above the inspection hatches.

Since the septic tank "Tank" has a small size and weight, all work can be performed without the involvement of special equipment. It is especially undesirable to use the technique when filling the pit, as it is possible to damage the tightness of the device.

At the exit you will receive water with a sufficient degree of purification for its use for technical purposes or for watering.

We equip the infiltrator

If the level of sewage treatment with a septic tank “Tank” does not suit you, then you can additionally equip the infiltrator. This device will purify water using an earthen filter. The works on installation and connection of the infiltrator are as follows:

• half a meter from the outlet of the septic tank, the excavation pit is digging in the form of an infiltrator;
• the bottom is covered with geotextiles;
• fit a layer of rubble, with a minimum thickness of 40 cm;
• on top of the filter layer is installed infiltration;
• connection of the septic tank outlet pipe to the infiltrator inlet;
• a vent pipe is mounted at the end of the device;
• warming is carried out, for this purpose it is better to use the material which is not afraid of influence of moisture and microorganisms;
• the whole structure is filled with sand or fine-grained soil.

The infiltration plant allows to significantly increase the degree of wastewater treatment, as a result, water that penetrates into the soil does not harm the environment.

If you have any questions on the topic or you have a desire to share personal experience, then write comments to this article.

Video

From the provided videos, you can get acquainted with the subtleties of mounting a septic tank with your own hands: