Good afternoon, dear guests and subscribers of the "Build for Myself" channel!
Many homeowners are faced with the problem of overflowing drains. Living all year round in the house and using the sewage system every day, after a couple of years we begin to notice that the water level of the drain pit does not decrease, but stabilizes in one place, or even drains overflow through the hatch. The water stops leaving.
And the problem is that neither a huge drain pit, nor a septic tank, consisting of 2 or even 3 tanks, has any effect on the water level. The water in the last filter well after some time reaches the maximum level and does not leave.
Why is this happening?
To understand the process, I propose to recall the physics and the principle of communicating vessels. The last filter well of a septic tank or the only pit is a vessel made in the ground, on which is usually the owner of the house and expects that sewage through it will slowly seep into priming.
But, the soil located around the drainage pit is the second vessel, therefore, over time, its absorbency decreases markedly. And this does not depend at all on whether the dirty drains fall into one single pit or it is clean water after 2 previous septic chambers.
This effect of a high water level will persist until the concentration of water in the soil around the pit becomes lower. Therefore, I recently wrote an article on which trees are better to plant near the pit in order to lower the concentration of water. After all, some trees consume and evaporate 200-300 liters per day (If interested, link to the article: Trees as the most powerful soil dryers)
The upper layers of the soil are more hygroscopic than the mainland caked soil, so the water does not spread into the depths, but through horizontal channels, where the roots of the trees pick up excess moisture.
I conducted an experiment at my parents' dacha: GWL at 6 m, the pit - 2.7 m deep. We drained the pit completely and a week later, the next weekend, we arrived at the dacha. The pit was full of water. UGV? No! GWL is lower than the pit. This is just the nearby soil as the second communicating vessel - it gave water along the path of least resistance into an empty pit, thus - drainage of the pit with the help of a cesspool machine - there was extra money thrown out.
Of course, the pit is the pit, there are home owners who are lucky. There are soils that, despite the size of the pit, absorb liquid faster than it is formed from a family of 4 people, and this is for a minute - 800 liters per day at a standard of 0.2 cubic meters. on human.
What to do?
To gradually restore the absorbency of the soil, there are the following methods:
The most important way: saving water discharged into the sewer.
You and I cannot control the absorbency of the soil. In every season, this indicator is different. The groundwater level is walking because of rains and melting snow, the concentration of water in the ground is high and nature cannot be fooled, therefore:
a) we adjust the float in the toilet cistern to half of the maximum level of the water to be poured (any mechanism allows this to be done);
b) we shave or brush our teeth, turning off the water in those moments when it is simply not needed;
c) we take a bath less often than we use a shower;
d) the pressure when washing dishes is at a minimum.
The second way is pumping out in small doses.
Having pumped out the pit completely, the water will come back, so there is no point in this, and instead of a sewer, it is better to spend money on buying a special pump.
The pump is pumped out every 2-3 days at 10-15% of the existing sewage volume. By removing a little water, we gradually drain the nearby soil. In summer this happens faster, as the warm earth helps to evaporate the same water.
In addition, with this method, we will not destroy all the bacteria that help us convert solid waste into liquid!
Thanks for reading my article! Hope it was helpful to you!
Water from a well or from a well. Determine water quality, acidity and hardness "on your knees"? (Folk options)
Trees with a strong root system that cannot be planted near houses + SNiP about minimum distances from the house
Trees - soil dryers (bio-drainage)
What plants will show and tell about GWL