Sagging Sewage System Strains-- Filth variations can develop your drain line to sag. When this happens, the area which has sunk accumulates paper in addition to squander bringing about a blockage.??? ????? ???????????? ??????????? ?????? ?? ??????????? ??? ????? ??????? ?? ??? ???? ??? ????????? ??? ?????? ?? ??????????.?????????? ????? ????????? ?