My bath is draining very slowly, it has a shallow drop off. The sink is just along the pipe from the bath and when emptying the sink it gurgles up and often comes up the bath plug.
I've chucked loads of bleach down it which gives temporary relief.
Oh wise ones come forth with your suggestions.
so then the immediate tub drain is clear, but they share a drain
is there access to that?
there must be a cleanout / trap somewhere close by
what is the floor below the bathroom? basement? can you go down there & look up & see if you have access to anything
never heard of bleach clearing a clogged drain. baking soda & vinegar, maybe, but that's not as strong as a gel type drain cleaner
if you try drain cleaner, dump a big bottle down the drain & wait 30 minutes then flush it w/ buckets of hot water
let that drain & repeat
when I do my tub drain, I do it manually with a plastic thing & a coat hanger & then 1/2 bottle of drain cleaner, hot water, then repeat w/ the 2nd 1/2 of drain cleaner & hot water. I usually only wait 20 minutes. so if yours is killer, then I was suggesting a whole bottle & 30 minutes (done twice)