A comment
About 2 years ago I read a lot on the Internet, in various forums about septic tanks, both professional ones, that is, plastic ones, and about self-made septic tanks (concrete, ring ones). The choice fell on the first option, so as not to have problems with neighbors and the law: there ses, protectors of the protective environment, etc. Many options were considered: Tank, Tver, Topas, but we stopped at Termite. I will explain why:
1. We never found a single objectively negative review of the septic tank.
2. Set up a pricing policy (Topas is good, but expensive for us)
3. Arranged the conditions of free delivery and discount on turnkey installation.
4 Recommendations of several local residents of our garden cooperative.
Conclusion: it works reliably, there are no complaints. That's just the neck would have been more necessary for me, I lost it with this, it flooded a little this year, and everything is fine. For a whole year there were no problems, I wintered winter well too, they mothballed, as it should be, in the spring they returned everything, they started everything again without any problems. In general, 5 points out of 5!
pros
Reliability, easy installation, good reputation of the company.