Sagging Sewage Procedure Lines-- Filth alterations can develop your drain line to sag. When this happens, the section that has sunk accumulates paper and waste resulting in a blockage.??? ????? ???????????? ??????????? ?????? ?? ??????????? ??? ????? ??????? ?? ??? ???? ??? ????????? ??? ?????? ?? ??????????.?? ????????????? ????? ??????? ?? ??????