I am replacing an old dishwasher. Currently the drain hose goes through the floor and into its own p-trap in the basement ceiling. The new dishwasher states that the drain hose to drain pipe connection must be a minimun 20 inches above the floor of the dishwasher. I was thinking of running the drain hose up to the 20 inch mark and then down through the floor to the existing p-trap. Does that sound okay or should I run the drain hose into the sink drain.