Today I washed a load of laundry and the drain overflowed about 4x the amount it normally does. Generally, it backs up a little bit in the basement, but we have a drain area for it. Today, it backed up significantly more than that. Then, when I went to take a shower, one of the pipes under my shower started dripping, though not very much. I saw the posting about a crushed pipe, but we have not had any other problems with this sort of back up before. Any thoughts would be fantastic.