Sagging Sewage Method Traces-- Dirt variations can generate your drain line to sag. When this happens, the area that has sunk accumulates paper along with squander leading to a blockage.??????, ?? ??? ??? ?????? ? ???? ?? ?????? ?? ????? ??? ?? ??????? ??? ??????????, ?? ???????? ?? ????? ??? ? ???????????? ??? ?????????? ?? ?????????? ?? ?????????