Filters for drinking water; filters for water purifiers; filters for water purifiers; strainers for water lines; filters for wastewater; filter apparatus for water supply installations; membranes for the filtration of water; water filtering apparatus; apparatus for filtering drinking water; water purifying installations; water filtering units; water purifying apparatus and machines; desalination plants; water purification, desalination and conditioning installations; water purifying installations; drinking water supply apparatus; water filtering apparatus; tap-water purifying apparatus; water filters for industrial purposes; concentration filters for aqueous solutions, such as waste water and industrial effluent.