Sagging Sewage Method Strains-- Dirt variations can generate your drain line to sag. When this occurs, the area which has sunk accumulates paper along with waste bringing about a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .???????????? ????????? ??