Sagging Sewage Technique Traces-- Dirt variations can make your drain line to sag. When this occurs, the part that has sunk accumulates paper in addition to waste bringing about a blockage.????????????? ???? ??? ???????? ??? ?????????? ???????????? ??? ???????? ??? ?? ????? ????? ??? ??? ??? ?????????? ????.???????????? ????????? ??? ?????????? ???