Sagging Sewage Method Strains-- Filth improvements can make your drain line to sag. When this occurs, the part that has sunk accumulates paper and waste leading to a blockage.??????? ????? ????????? ?? ????? ???????, ?????????? ??? ??????????? ??????, ??????? ??? ?? ????????? ??? ??? ???????? ??????????.?????? ??? ??? ?????????, ?????? ??? ??? ????