Hi, I have purchased a new dishwasher and need help with installation. The home (100+ years old) was never designed for a dishwasher, so this is a new installation. The problem I am having is that the location of the dishwasher is around the corner from the sink and the drain hose that came with the dishwasher will not reach. Couple of questions: Is there a limit to how far a dishwasher can drain? Is an air gap necessary if draining into a disposal assuming i loop the line high under the counter?