Abstract: The present invention provides a gassing rail for gas flushing containers and caps on a rotary capping machine, wherein the gassing rail includes a generally planar body, an upper surface formed on the generally flat planar body, the upper surface having at least one cap gas distribution slot defining a longitudinally extending cap path, the cap gas distribution slot includes an infeed end and an exit end, a lower surface formed on the generally flat planar body, the lower surface having at least one container gas distribution slot defining a longitudinally extending container path, the container gas distribution slot includes an infeed end and an exit end, wherein the cap infeed end is horizontally spaced apart from the container infeed end and the cap path and container path horizontally converge in the direction towards the cap exit end and container exit end.