Sagging Sewage Program Traces-- Dust adjustments can create your drain line to sag. When this occurs, the area which includes sunk accumulates paper together with squander leading to a blockage.????? ?? ???????? ???????? ??? ????? ????????? ? ????? ??????????.?? ??? ????? ????????? ??????????? ?????????? ??????, ??????????? ?????????????? ??? ?? ??