Ok, so i know absolutely nothing about plumbing or dishwashers for that matter. I have been having a few issues with my dishwasher in that food residue is still on the dishes after it has come through a full cycle. Same happened this morning and noticed in one cup that there was burnt toast. Now nothing went into the dishwasher with burnt toast on it but I did wash burnt crumbs down the kitchen sink last night before I ran the dishwasher. Could ny dishwasher be plumbed up to my sink or is that the way its meant to be. Seems a bit gross if that's the way it meant to be. Does anyone know what the dishwasher is meant to be plumbed to and how I can check! Thanks.