Sagging Sewage Technique Lines-- Filth alterations can build your drain line to sag. When this happens, the segment which includes sunk accumulates paper together with waste leading to a blockage.????????????? ???? ??? ???????? ??? ?????????? ???????????? ??? ???????? ??? ?? ????? ????? ??? ??? ??? ?????????? ????.??? ? ???????? ???? ???????????? ?