Sagging Sewage System Strains-- Filth alterations can make your drain line to sag. When this occurs, the section which has sunk accumulates paper as well as squander bringing about a blockage.?? ? ??????????? ????? ???? ??????? ???? ??????????? ?????, ????? ?? ????? ??????? ??? ????????? ???, ?? ?????? ???? ?? ??? ?????????????.???? ??????? ??? ???