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Mine just has a random tube flopping about like that from the top of the syphon.
Where does it "flop"? I think this might be critical!
As far as I can tell, the tube is the only connection between the flush button and the cistern. It appears to be some sort of bellow valve and I think it's supposed to connection to something inside to "flush".
However, the access is pitiful. Added to that I have no clue what I'm doing.
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