Sagging Sewage Method Strains-- Dust alterations can create your drain line to sag. When this happens, the part which has sunk accumulates paper and squander resulting in a blockage.????? ???? ????????? ?? ?????????? ???? ???????? ? ???????? ??? ??? ??????????, ?? ????????? ??? ??? ??? ???? ?? ?????????, ?? ??????? ?? ?????? ??? ?? ??????? ??? ?? ?