Compared to conventional aerators, it saves about 40% of water and energy while producing a pleasantly soft and splash-free stream. Thanks to its patented design, a lot of air is mixed into the water even at very low flow rates. Air that doesn't have to be paid for makes the water jet from the aerator pleasantly full and soft. The distinctive feature of the Long-Life aerator is the visibly coarse mesh screen lens. This unique arrangement of the screens ensures that only a small amount of water remains in the RST aerator after the tap is closed. This effectively reduces limescale buildup, unlike conventional aerators, where the slowly evaporating residual water inevitably leads to rapid and unhygienic limescale formation. The Long-Life universal aerator fits all faucets with M24x1 internal threads and M22x1 external threads.