Abstract: A filter (1) for the purification of water comprises an inlet (2) for water to be treated, an outlet (3) for treated water, filtration elements interposed between the inlet and the outlet. The filtration elements comprise two networks (5, 6) of tubes respectively for distribution and drainage associated respectively with the inlet (2) and the outlet (3), disposed substantially opposite and spaced from each other and provided with perforations (7) distributed longitudinally along their transverse walls, filter material (8) interposed between the two networks (5, 6), and distribution elements associated with the network (5) of distribution tubes (5a) and adapted to ensure a diffusion of the water to be treated toward the filter material (8).