Sagging Sewage Method Traces-- Dirt changes can make your drain line to sag. When this happens, the area which includes sunk accumulates paper together with squander leading to a blockage.????????? ?? ????? ??? ???????? ??? ??? ?????????? ?? ?????? ??? ????????? ??? ??????? ??? ?????? ???????? ????????.?? ?????? ???????? ??????? ??? ?????????? ????