Sagging Sewage Technique Lines-- Dust changes can build your drain line to sag. When this occurs, the part which includes sunk accumulates paper and squander bringing about a blockage.???? ????????? ??? ????????, ???? ??? ?????????, ???? ??? ???????????????? ???????? ??????????, ???????? ???? ??? ??? ?? ?????? ????? ???? ???? ????? ? ??? ????? ???