Sagging Sewage Method Traces-- Grime changes can build your drain line to sag. When this happens, the area that has sunk accumulates paper in addition to waste leading to a blockage.????????????? ?? ?? ?????????? ?????? ??? ?????????? ???????? ??? ??????? ???? ???????? ???????? ?? ????? ??? ???? ??? ??? ?? ??? ????????????.) ????? ????, ????? ??? ?