when i push button down on toilet it flushes contents away fine but doesnt finish the full flush,,after 30 seconds water starts to pour back into bowl from rim.it works after about 5 flushes.
could be a faulty siphon or the rods beneath ur push button are the wrong lenght
ahplumb
May 2010
sounds like the valve is sticking open for some strange reason. have a little chat to steve at toiletspares.co.uk he'll do his best to solve your mystery.
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Try fixfault.com to fix toilets.