Sagging Sewage Program Traces-- Dirt alterations can develop your drain line to sag. When this occurs, the section which has sunk accumulates paper as well as squander resulting in a blockage.??? ????? ???????????? ??????????? ?????? ?? ??????????? ??? ????? ??????? ?? ??? ???? ??? ????????? ??? ?????? ?? ??????????.???? ??????? ??? ??? ????? ?????