Sagging Sewage Procedure Lines-- Dirt changes can produce your drain line to sag. When this happens, the section which includes sunk accumulates paper and waste leading to a blockage.????????????? ???? ??? ???????? ??? ?????????? ???????????? ??? ???????? ??? ?? ????? ????? ??? ??? ??? ?????????? ????.????? ?????? ??? ?????????? ?? ?????? ??? ?????