Sagging Sewage Technique Strains-- Filth alterations can generate your drain line to sag. When this happens, the segment which has sunk accumulates paper and squander leading to a blockage.????????? ?? ????? ??? ???????? ??? ??? ?????????? ?? ?????? ??? ????????? ??? ??????? ??? ?????? ???????? ????????.??????????????? ?? ??????? ??? ??????????? ??