Sagging Sewage Program Lines-- Dust variations can build your drain line to sag. When this happens, the part which includes sunk accumulates paper along with squander bringing about a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .????? ????? ????? ?