Sagging Sewage Program Strains-- Dirt improvements can develop your drain line to sag. When this happens, the portion which includes sunk accumulates paper as well as waste leading to a blockage.?????????? ???????? ???????? ???????????? ????????????????? ??? ??? ????? ???? ????? ????? ? «?????????? ????????» ????? ? ???????? ??? ????.? ???????? ?