Sagging Sewage System Traces-- Grime variations can develop your drain line to sag. When this occurs, the segment that has sunk accumulates paper along with squander leading to a blockage.????????????? ?? ?? ?????????? ?????? ??? ?????????? ???????? ??? ??????? ???? ???????? ???????? ?? ????? ??? ???? ??? ??? ?? ??? ????????????.) ????? ????, ?????