Thanks for the suggestions. The chemicals have been well and truly flushed through, as all the water has come out in the bathroom sink! I do agree that pressure may be the only solution. I have one of those water-jet type plungers, so my next attempt will involve attempting to seal off the...
I'm looking for suggestions for clearing a blocked drain in my house. I have already had a plumber round to unblock it without any success. The blockage is in a 40mm waste pipe which runs under the floor from my kitchen, via a downstairs bathroom sink, and then into the main drain. The pipe has...