Sagging Sewage Process Strains-- Dust variations can create your drain line to sag. When this occurs, the part that has sunk accumulates paper and also squander leading to a blockage.???? ????????? ??? ????????, ???? ??? ?????????, ???? ??? ???????????????? ???????? ??????????, ???????? ???? ??? ??? ?? ?????? ????? ???? ???? ????? ? ??? ????? ??? ?