It would seem that it can be difficult to install a drain pit! I dug deeper - and that's it! In fact, in this process there are some tricks and nuances that many do not even know about. Today I decided to share them with you.
I have a very impressive experience in installing drain pits. I have been doing this for more than a dozen years, so with a clear conscience I can call myself a professional! And as a professional I will tell you about some tricks.
Many cottage communities in Russia are not equipped with a central sewerage system. Here is such an elite housing without water! Therefore, residents have to dig drain holes. The method is used for this in a standard, effective and inexpensive way.
The final depth of the pit will depend on the budget of the work. Also, this indicator is influenced by the depth of groundwater.
- If this indicator is not more than one meter, then it will not work to dig a drain hole deeper than one meter. For such a pit, a meter ring with a wide diameter (at least 2.2 meters) is required.
- If the groundwater runs at a depth of 2 meters, it will be possible to dig a hole by 2 meters, which means that 2 meter rings will be needed. In this case, you can make the hole smaller in diameter, for example, 1.7 meters.
As an example, I decided to take a hole, the depth of which is slightly more than 3 meters. She has three rings, respectively.
- We lower the concrete bottom to the bottom of the dug hole. We put it directly on the ground. Some people prefer to sprinkle the clay with gravel, but I do not recommend doing this. I'll tell you why a little later.
- We install three meter rings on the concrete bottom and cover the structure with a lid on top. Do not forget that there must be a plastic hatch on the lid, through which waste will be pumped out in the future. You can also periodically look into the hatch to make sure that everything is in order with the well.
You can treat the rings with bitumen, and seal the seams with cement. But again, I don't. During the operation of the pits, the cracks go away, as they are filled with microorganisms living in the well. These organisms cover the inside of the pit with a durable, thick film.
These pits are the most popular and common. It is necessary to pump out waste from them approximately once a month. The cost of this procedure varies within 500 rubles.
I would like to suggest an option with two pits, because I consider it more profitable and efficient. It is not popular because people think it is time consuming and expensive to dig two holes. I will try to convince you otherwise.
Advice from a seasoned drain hole installer
The drain pit is filled to the brim with waste and water. However, you can make sure that it does not fill up to the very top. To do this, you need to equip some unit that filters the water, cleaning it from debris.
Solid particles sink to the bottom under their weight. And a dirty fatty film forms on the surface of the liquid. Pure water remains in the center, and that's what needs to be separated.
This is done using a tee located on the overflow pipe. It separates the water, so you can not call the sewers for almost a year.
A big plus is that the soil remains uncontaminated. Let me remind you once again that I have been working with drain pits for a long time, and therefore I saw what happens to the soil that is under the drain pit.
Once I had to dismantle a 10-year-old pit. And although the bottom was not concrete, the soil contamination spread only 30 centimeters down.
By installing an overflow, you can save about 7,000 rubles a year. It turns out that the double pit will pay off in 2 - 3 years. Such a pit will serve for more than a dozen years, despite the fact that it is necessary to pump out waste from it only once a year - one and a half (or even less often).
By the way, let's get back to the issue with gravel. Why don't I put it on the bottom of the pit? But because crushed stone allows water to pass through.
Microorganisms living in the pit will eventually close the gaps between the gravel particles, and the water will not go anywhere. During my practice, I opened several of these holes in order to get rubble from the bottom.
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