Sagging Sewage Program Strains-- Dust modifications can develop your drain line to sag. When this occurs, the area which includes sunk accumulates paper and also waste bringing about a blockage.?? ? ??????????? ????? ???? ??????? ???? ??????????? ?????, ????? ?? ????? ??????? ??? ????????? ???, ?? ?????? ???? ?? ??? ?????????????.?? ???? ???? ???,