Sagging Sewage Process Lines-- Filth improvements can generate your drain line to sag. When this happens, the section which includes sunk accumulates paper and also squander leading to a blockage.????? ???? ????????? ?? ?????????? ???? ???????? ? ???????? ??? ??? ??????????, ?? ????????? ??? ??? ??? ???? ?? ?????????, ?? ??????? ?? ?????? ??? ?? ??