Sagging Sewage Method Lines-- Dust improvements can create your drain line to sag. When this happens, the section which has sunk accumulates paper and waste resulting in a blockage.????? ???? ????????? ?? ?????????? ???? ???????? ? ???????? ??? ??? ??????????, ?? ????????? ??? ??? ??? ???? ?? ?????????, ?? ??????? ?? ?????? ??? ?? ??????? ??? ?? ??