I live in a 1952 pier and beam house that has never had a real dishwasher. I have a space for it but there is no place for the plumbing to go except under the floor. My plumber has said the incoming water is not a problem but the drain line needs to go down and then back up again. He said that the average dishwasher pump will not last long doing this. So I wonder if anyone has used an external pump to assist this or knows of another solution.