Sagging Sewage Technique Strains-- Dirt changes can build your drain line to sag. When this happens, the area which includes sunk accumulates paper in addition to squander leading to a blockage.) ????? ?????? ??????. ?? ?????????? ??????????? ?? ????? ???? ?????? ???? ??????? ? ???? ???????????, ???? ?? ??????? ? ???? ??? ?? ??????.?? ?? ???? ?????