The drain hose for this model appears to be specifically set up to be hooked up to an adjacent disposal unit.  If you don't have this set up in your kitchen, beware.  Ours stands alone on an island and gets it supply and drain lines from the basement directly underneath it.  The drain line doesn't have anyway to stay elevated as needed.  I literally had to time the line up behind the unit so the water doesn't get siphoned through the bottom during use.  Not to mention I had to add an extension to the drain line because after it was elevated, it was too short to reach the existing hard drain line.  
Very poor design in my opinion. The unit did work nicely after it was installed.