The Urspring rinses itself as often as necessary. When filtering water in cities, this is typically once a day, rinsing takes around 3 seconds and requires around 3 to 5 liters of water. If the water quality temporarily deteriorates significantly, the Urspring can also rinse more often on its own until the filter becomes less dirty. This process happens fully automatically. The rinse is delayed if water is currently being used in the house - so the Urspring does not rinse when someone is showering! The biofilter does not have to be cleaned, it is installed in front of the Urspring, so that contaminants and germs are stopped there at the latest.