I have the aerators mounted below the kitchen sink because of (several meters long) drain behind has repeatedly gegluckert loud. The ventilation is working properly, if I have the impression that the flow of water is now a bit clearer than before listening. I find, however, not particularly disturbing. However, the nut did not fit vernünfitg to the threads of the connected arc, as it was too small or distorted, and the connection was not close. I then helped me with another nut that fit. As the other reviewers did not have this problem, I start from a single case. Now the water flows in any case again easily and without disturbing gurgling.
