A colour change system for a powder coating facility, comprising: a plurality of powder containers , each powder container holding one of a plurality of different coloured coating powders; a conduit for conveying coating powder from one of the powder containers to a coating applicator ; a suction unit connected to the conduit and having an end-piece with an inlet opening into which coating powder is drawn, wherein the suction unit comprises an inducer in the end-piece adjacent to the inlet opening of the suction unit , and wherein the inducer comprises an air nozzle and a venturi tube section ; a cleaning unit ; a translation mechanism for moving the end-piece of the suction-unit ; and a controller , wherein: each of the plurality of powder containers has an opening in an upper surface into which the end-piece of the suction unit can be inserted; the cleaning unit comprises a top opening for receiving the end-piece of the suction unit , a vertically oriented chamber for receiving the end-piece of the suction unit through the top opening , a first air blowing arrangement for cleaning an outer surface of the conduit within the vertically oriented chamber , and a second air blowing arrangement for cleaning insides of the suction unit and the conduit within the vertically oriented chamber ; and the controller is configured to effect a change of coating powder colour by controlling the translation mechanism to extract the end-piece of the suction unit from a first powder container , to move the end-piece of the suction unit to the cleaning unit , and after cleaning to move the end-piece to a second, different powder container and insert the end-piece into the second, different powder container . a plurality of powder containers , each powder container holding one of a plurality of different coloured coating powders; a conduit for conveying coating powder from one of the powder containers to a coating applicator ; a suction unit connected to the conduit and having an end-piece with an inlet opening into which coating powder is drawn, wherein the suction unit comprises an inducer in the end-piece adjacent to the inlet opening of the suction unit , and wherein the inducer comprises an air nozzle and a venturi tube section ; a cleaning unit ; a translation mechanism for moving the end-piece of the suction-unit ; and a controller , each of the plurality of powder containers has an opening in an upper surface into which the end-piece of the suction unit can be inserted; the cleaning unit comprises a top opening for receiving the end-piece of the suction unit , a vertically oriented chamber for receiving the end-piece of the suction unit through the top opening , a first air blowing arrangement for cleaning an outer surface of the conduit within the vertically oriented chamber , and a second air blowing arrangement for cleaning insides of the suction unit and the conduit within the vertically oriented chamber ; and the controller is configured to effect a change of coating powder colour by controlling the translation mechanism to extract the end-piece of the suction unit from a first powder container , to move the end-piece of the suction unit to the cleaning unit , and after cleaning to move the end-piece to a second, different powder container and insert the end-piece into the second, different powder container . <EOS>