Sagging Sewage Program Strains-- Filth variations can develop your drain line to sag. When this occurs, the segment which includes sunk accumulates paper together with squander resulting in a blockage.?????????? ????????, ????????????? ??? ???????? ???? ?????, ???????? ? ???????:????? ????? ????? ? ???????? ????? (?.?. ?????? ???????????)). ?? ????