Sagging Sewage Technique Strains-- Filth alterations can produce your drain line to sag. When this happens, the area which includes sunk accumulates paper and also waste resulting in a blockage.?????????? ?????? ????? ??????????? ????????? ??????????? ??????? ??? ??? ????? ????????????? ???????? ??????, ???????? ??? ??????????? ??? ????? ?????? ???