A comment
In the summer we went to friends in the country. I was pleasantly surprised by the presence of sewage. To my legitimate question, how is everything implemented, the owner showed me the septic tank Microbe installed on the site. Having appreciated all the advantages of the septic tank, he decided to install the same, but slightly larger volume, since the owner complained about insufficient bandwidth. I buried my septic tank with a volume of 450 liters to a depth of 2 meters, held pipes and performed all the connecting work according to the attached instructions. I had to tinker with the valve positions, but in the end I set everything up and have been using it for several months now without knowing the troubles.
pros
1. Installing a septic tank manually without involving specials. technicians
2. Reliability of construction
3. Ease of use without additional equipment
Minuses
1. Take a larger size immediately so as not to run into the problem of low bandwidth.