Sagging Sewage Program Lines-- Dirt changes can create your drain line to sag. When this happens, the section which has sunk accumulates paper in addition to waste resulting in a blockage.?? ? ??????????? ????? ???? ??????? ???? ??????????? ?????, ????? ?? ????? ??????? ??? ????????? ???, ?? ?????? ???? ?? ??? ?????????????.?? ????????????? ????? ?