Review on Sewer installation VORTEX KN-300 (300 W) by Petar Kolev ᠌

He hid the horizontal sewer pipe in a screed, apparently for this reason the water from the toilet began to leave badly. Dismantling, raising the toilet, it's all long and expensive. Advised to put a compact pressure pump. Whirlwind KN-300 came up for the price and good reviews about it. Takes up little space in a cramped bathroom. Turns on by itself. The non-return valve conducts water in only one direction, preventing it from being thrown back. After installation, the problems disappeared, I want to believe that for a long time.