Sagging Sewage Process Traces-- Filth alterations can develop your drain line to sag. When this occurs, the area that has sunk accumulates paper and waste bringing about a blockage.??????? ??? ?????? ???????????? ??????????, ?? ????? ??? ?? ??????????? ??? ?????????? ??? ?????? ???????? ??? ????????? ??? ???? ?????? ???.?? ?????? ???????? ??????? ?