Sagging Sewage Program Lines-- Filth changes can produce your drain line to sag. When this happens, the part which has sunk accumulates paper along with waste bringing about a blockage.?? ? ??????????? ????? ???? ??????? ???? ??????????? ?????, ????? ?? ????? ??????? ??? ????????? ???, ?? ?????? ???? ?? ??? ?????????????.???? ?? ???????? ??? ??????