Fits BWT E1 single-lever filter European standards EN 806-5 and EN 13443-1 prescribe filter replacement every 6 months for perfect water hygiene Protection of all water-carrying devices from dirt particles Easy replacement of the filter element in a few seconds European standards recommend house water filters to protect the house installation and the connected devices from dirt particles*. Unfortunately, such a filter is often forgotten after installation, vegetates for years and becomes a hygiene problem. That's why the same standards also require that every filter is serviced at least every six months. With your BWT single-lever filter, the new E1 hygiene system and the BWT Best Water Home App, you have all this perfectly under control and can enjoy carefree, refreshing drinking water * European standards EN 806-5 and EN 13443-1, DIN 1988-200, ÖNorm B 2531 The single-lever filter Makes the filter change easier than ever, 3 handles are enough: Unlock the safety catch Pull up the leve Insert the new hygiene vault (this is the filter cup with the filter element) or the filter element alone. In a few seconds, perfect water hygiene is ensured. In addition, the E1 also avoids splashing water when replacing the hygiene safe and the water pipe does not run empty.