Sagging Sewage Program Traces-- Dust alterations can generate your drain line to sag. When this occurs, the portion which includes sunk accumulates paper and also waste resulting in a blockage.??????????? ????? ??? ??? ??? ?????????? ?????? ??? ???????????? ?? ????? ????? ??? ????????, ??? ????????? ??? ??? ??????? ????????? ?????? ??? ????????????