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Is it possible to put the caustic stuff past the trap, assuming you feel like taking it off again? Also do you have access to the other end? My mums flat has very poor (i.e. uphill) runs to the main drain, but we have an end-cap outside that you can get to to try and rod it out from there
branwen-
Might be able to if I get a bottle I can angle in there once I have the trap off? I'll try that if a beefier plunger doesn't shift it.
Unfortunately we don't have access to the other end, or at least I wouldn't feel safe having a look as we're in an attic flat and I'd have to climb out of a skylight and squat precariously on the roof.
squidink
Pretty basic problem for the DIY thread but: Our kitchen sink has gone from freely draining to totally blocked in the space of a day. I've taken the trap out and checked that and the pipe immediately below the sink for blockages and they're both completely clean. My wife wants me to buy some caustic unblocker gel and fling it down there which is always her nuclear solution to any slow-running sink but I'm pretty reluctant to risk having it just sit there in the trap and burn the shit out of whoever opens it up the next time since we've established there's nothing immediately obvious there for it to dissolve. I'm a bit of a plumbing idiot, is there anything else I can do that might have an effect? Our landlady hasn't responded to my email about our malfunctioning hot water pump so I can't imagine she'll exactly jump on this.