Sagging Sewage System Traces-- Filth adjustments can build your drain line to sag. When this occurs, the section that has sunk accumulates paper in addition to squander bringing about a blockage.?? ????????????? ????? ??????? ?? ???????? ?? ?????? ???? ???, ??????????? ?????? ?????????? ????????? ??? ?????? ??? ????????????? ????????? ?? ??????, ??