It goes down the wall to the bottom of the slideout, the end butts up against a gap in the steel frame at the outer edge. You can see it if you go outside and look carefully straight up along the edge of the slideout. While you've got it exposed, blow through the end to make sure it's not clogged. Ours had spray foam inside it, not just around it, where it exits outside in the gap. I had to dig the foam out of the tube with a long wire. Before that, the dishwasher wasn't drying the dishes properly, everything was left wet inside. Works great now that it can blow the moist air outside during the (long) dry cycle.