Sagging Sewage Process Strains-- Filth adjustments can produce your drain line to sag. When this occurs, the portion that has sunk accumulates paper and waste leading to a blockage.????????????? ????? ?????????? ???? ?????????? ????????????? ???? ???????? ??? ??? ??? ??????, ???? ??? ??????? ?????? ??? ????????????? ?????????? ??? ??? ?? ??????????