Sagging Sewage Procedure Strains-- Dust changes can create your drain line to sag. When this occurs, the section which includes sunk accumulates paper together with waste leading to a blockage.?????????? ?? ????? ??????? ?????????? ??? ???????? ??? ??? ??????????? ?? ??? ?????? ?????????? ????????? ?????????? ?? ???? ??????? ???, ???? ??? ???? ????