Sagging Sewage Method Strains-- Dirt changes can generate your drain line to sag. When this occurs, the segment which has sunk accumulates paper and waste resulting in a blockage.??? ????? ???????????? ??????????? ?????? ?? ??????????? ??? ????? ??????? ?? ??? ???? ??? ????????? ??? ?????? ?? ??????????.??? ? ???????? ???? ???????????? ?????? ?????