Sagging Sewage Method Traces-- Dirt changes can generate your drain line to sag. When this happens, the part that has sunk accumulates paper as well as waste bringing about a blockage.??????, ?? ??? ??? ?????? ? ???? ?? ?????? ?? ????? ??? ?? ??????? ??? ??????????, ?? ???????? ?? ????? ??? ? ???????????? ??? ?????????? ?? ?????????? ?? ????????? ?