The Freilauf - TWIST drain valve is a world first and will be presented for the first time at ISH 25. It is finally an alternative to the click valve. It is a simple design, very robust, easy to clean, hair-free, flat and inexpensive to manufacture. It is operated by turning and consists of a wave-shaped lifting contour and a cover with three feet. It is surprisingly easy to operate. Even with soap on your fingers, the lid can be twisted easily.