Sagging Sewage System Traces-- Dirt modifications can develop your drain line to sag. When this happens, the part that has sunk accumulates paper in addition to waste bringing about a blockage.??????, ?? ??? ??? ?????? ? ???? ?? ?????? ?? ????? ??? ?? ??????? ??? ??????????, ?? ???????? ?? ????? ??? ? ???????????? ??? ?????????? ?? ?????????? ?? ??