Means for admixing of additives, and thus performed procedure for cleaning and / or disinfecting

The invention relates to a device for dosable admixing of an additive (A) via a solution flowing from a feed pipe (6) into a main pipe (1), comprising an injector (3), whose suction opening (4) is connected to the feed pipe (6), as well as a through-flow regulating valve (8) arranged in the feed pipe (6). The injector (3) has at least two suction openings (4, 5) placed in the direction of solution flow (10) at a same height. The second suction opening (5) is connected to a second feed pipe (7) for a second additive (B). The additive concentrations can be independently adjusted over a wide range.