Sagging Sewage System Strains-- Dust adjustments can create your drain line to sag. When this occurs, the portion that has sunk accumulates paper and also squander leading to a blockage.?????????? ?????? ????? ??????????? ????????? ???????– ????? ????????? ???? ??????? ??? ??? ??? ??????? ????.?? ?????? ????????????? ??? ????? ??????????? ???????