I have an older colial style home and the second floor has one large bedroom with a large storage area in the rear of the home. I would like to create a master suite on the second floor but I feel I have a potential problem. The hot and cold water lines are run up into the second floor along with a PVC drain pite that is not tied in yet. The floor joists are old and they are 2x6 maybe 6 1/4". I have seen some remodelers make the mistake of cutting the joist to run the drain lines. I do not want to make the same mistake. Does anyone have any suggestions what to do about the drain line?