Installations relating to membrane filtration technology; Membrane purifying apparatus for the purification of water; Membranes for reverse osmosis units; Installations for purifying water; Machines for processing (purifying) water; Filter diaphragms for water supply or sanitary purposes; Filter screens (parts of water supply or sanitary installations); Membranes for water filtering apparatus; Apparatus for filtering water; Filter apparatus for water supply installations; Apparatus for the separation of liquids being water filtering apparatus