The present invention relates to a diffusers for entering water for gas addition, the diffuser, it includes an antipriming pipe (1) and at least one supply pipe (2), it indicates, at least one supply pipe (2) is coupled at one end for a source of gas supply and mutually circulates in the other end and antipriming pipe (1), and by least one internal supply pipe, (4 are supplied to antipriming pipe (1) to gas 5 15) the slave supply pipe (2) of antipriming pipe (1). Supply pipe of the present invention inside that at least one (is distinguished in 4 5 It 15) is the pipe of a not perforated property and at least one outlet (4a with a free end for being located at least one internal supply pipe (4,5,15), 5a, 15a), the gas exports (4a by least one, 5a, 15a) it is suitable for being assigned to antipriming pipe (1).
