I have fed a wire spring thing,into the stack via the basin waste pipe,
it has gone down a fair way and hit nothing as far as I can tell.With
the kitchen sink draining ok into the same stack about 8 ft below ,I
cant understand why I havent hit the blockage with my 15ft wire.
I can flush away liquids and it drains slow ( 5 mins for water to go
down) with lots of gurgling from bath plughole.