So, means were spent in vain, time and effort.

Suppose the most popular and popular were reinforced concrete septic tanks that had excellent stability. Despite the appearance of the soil, it was very difficult to move this septic tank from a place, since it had a fairly large weight. It was the so -called anchor. But he had his drawbacks: due to heavy weight, his installation required additional equipment. In other words, the design is quite heavy, and it was much more expensive to install it than the current septic tank. And, in the end, all the rings had to be connected by welding, which could not guarantee a long service life. So, means were spent in vain, time and effort.