Sagging Sewage System Traces-- Filth alterations can build your drain line to sag. When this happens, the area which has sunk accumulates paper together with waste bringing about a blockage.??????? ????? ????????? ?? ????? ???????, ?????????? ??? ??????????? ??????, ??????? ??? ?? ????????? ??? ??? ???????? ??????????.? ???????? ??????????, ???????