The baffle monted on the regulator can be set in 5 different positions (see scale of technical data). In front of this baffle there is another baffle with a corrugated extract. This baffle is being moved through a floating ball depending on the water level. Due to this the corrugated opening narrows or dilates. Thus having a constant amount of water independent from the water level. A pair of brushes situated in front of the baffle is cleaning the corrugated opening with every move. Thus no aerosols can be accumulated at the opening.