Sagging Sewage Program Traces-- Dirt changes can make your drain line to sag. When this happens, the section that has sunk accumulates paper along with squander leading to a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .????? ????? ????? ? ???????? ?