Sagging Sewage Technique Strains-- Grime variations can make your drain line to sag. When this occurs, the part which includes sunk accumulates paper and also waste resulting in a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .????????????? ???? ??? ?