Sagging Sewage Process Traces-- Filth modifications can make your drain line to sag. When this happens, the area that has sunk accumulates paper together with waste bringing about a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .??????? ??? ??? ?????