Sagging Sewage Technique Lines-- Grime variations can build your drain line to sag. When this occurs, the part which includes sunk accumulates paper together with squander leading to a blockage.?? ?????? ??? ?????????????, ???????????? ????? ??????????? ??? ??? ?? ???? ????????? ???, ???? ??? ??????? ???? ????? ????????? ?????? .??? ? ???????? ????