The cylindrical emitter (3) with water filter is welded into a pipe (2), the filter develops in the internal concave surface of the emitter and is comprised of a collection channel (4) developing preferably peripherally and to an arc of large magnitude incorporating considerable number of orthogonal openings (5) formed by the side walls (11) of shallow channels (12) that cross perpendicular the collection channel (4) extended to a considerable length front and rear of the openings (5). Every opening (5) cones ponds to a shallow channel (12), the shallow channels are parallel to the flow (14) of the water and are preferably raised over the internal concave surface of the emitter. The flow in the shallow channels (12) feeds continuously the collection channel (4) irrespectible if the surface of the openings (5) is covered or not by foreign particles (15). The openings (5) and the side walls of the filter are formed with the engraving of longitudinal, shallow and preferably radial channels on the cylindrical core of the mold that forms also the internal cylindrical surface of the emitter.
