Sagging Sewage Process Lines-- Dust adjustments can produce your drain line to sag. When this happens, the portion which has sunk accumulates paper in addition to squander bringing about a blockage.?????????? ?? ????? ??????? ?????????? ??? ???????? ??? ??? ??????????? ?? ??? ?????? ?????????? ????????? ?????????? ?? ???? ??????? ???, ???? ??? ????