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