Sagging Sewage Technique Strains-- Grime improvements can build your drain line to sag. When this occurs, the area that has sunk accumulates paper and waste leading to a blockage.??????????? ????? ??? ??? ??? ?????????? ?????? ??? ???????????? ?? ????? ????? ??? ????????, ??? ????????? ??? ??? ??????? ????????? ?????? ??? ?????????????, ?? ???????