Can any water be filtered, such as river water? 24 April 2023 06:38 Updated No - the water filter has only been developed for filtering conventional tap water (drinking water). Related articles Where can I buy the filter? Where is the recommended installation location? Does it make sense to sterilise the water in the tank using UV rays before using the clearliQ travel water filter? Does the Grünbeck water filter have to be installed vertically? HYMER water filter clearliQ travel powered by Grünbeck