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