Sagging Sewage Program Strains-- Dirt changes can generate your drain line to sag. When this happens, the segment which has sunk accumulates paper as well as squander leading to a blockage.??????? ??? ?????? ???????????? ??????????, ?? ????? ??? ?? ??????????? ??? ?????????? ??? ?????? ???????? ??? ????????? ??? ???? ?????? ???.??????????? ????? ??