Sagging Sewage System Lines-- Dust alterations can build your drain line to sag. When this occurs, the part that has sunk accumulates paper along with waste bringing about a blockage.????????????? ?? ?? ?????????? ?????? ??? ?????????? ???????? ??? ??????? ???? ???????? ???????? ?? ????? ??? ???? ??? ??? ?? ??? ????????????.???? ? ?????????? ??? ??