There are several possible causes.
1. drain blockage
2. vent line blockag
3. improperly designed or missing vent line. This is the likely cause if you've always had this problem ever since the laundry or toilet was put in place.
There are several possible causes.
1. drain blockage
2. vent line blockag
3. improperly designed or missing vent line. This is the likely cause if you've always had this problem ever since the laundr ...
666 发表于 2009-4-26 12:26 PM