Abstract: An apparatus for universal water treatment with cylindrical housing and rotating ring-baskets, in which the housing is provided with untreated water inlet and purified water outlet stubs and the rotating filter baskets contains a back-washing chamber for regeneration of the baskets. The rotary filter baskets contain also an annular coagulating space formed in the cylindrical housing connected to the untreated water inlet stub. The rotating filter baskets are arranged uniaxially with the coagulation space and with each other. The filter baskets may be arranged within or above each other. Several filter beds are arranged in the filter baskets separated from each other and provided with independent back-washing chamber. The filter beds are arranged between cylindrical, perforated partition walls.