Sagging Sewage Method Strains-- Filth changes can make your drain line to sag. When this happens, the portion that has sunk accumulates paper along with waste resulting in a blockage.?????????? ?? ????? ??????? ?????????? ??? ???????? ??? ??? ??????????? ?? ??? ?????? ?????????? ????????? ?????????? ?? ???? ??????? ???, ???? ??? ???? ????? ???????