Sagging Sewage Program Lines-- Filth alterations can create your drain line to sag. When this occurs, the portion which has sunk accumulates paper in addition to squander resulting in a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .?? ???????????? ??