Toilet flapper stays open, why?

[helprequiredplease]

My toilet is fairly new, it has no build up at all inside. I'm not sure of the brand as it doens't have any names on it. It's a two push button flush and every other time you press the flush (doesn't matter which half) it just stays open. The flapper does not fall back down on it's own and then leak, it just doens't close by itself sometimes. If you jiggle the button it will fall so it doens't seem to be catching on anything either. i don't see a chain inside, it seems to open via a plastic lever type thing. when it does close it seals fine. i don't get why it's sticking open only sometimes? it's driving me mad! Pics attached of the inside. What do you think i need to replace?

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• helprequiredplease
• 24 Jul 2008
• 1

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• helprequiredplease
• 24 Jul 2008
• 1

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• helprequiredplease
• 24 Jul 2008
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• 24 Jul 2008
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• 24 Jul 2008
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[Softus]

Good pictures!

This is one of the problems with cheap/imported/unbranded flush valve.

Given that jiggling the button helps, there must be something catching, or just sticking because of friction. You should be able to work out where the catching/sticky parts of plastic are, then it's a matter of either lubricating or shaving off whatever is catching.

Or, you could replace the flush valve with a branded one. Multikwik do a reasonable one. This option would mean removing the cistern to do the work.

 

[thornton_chris]

I had exactly the same problem with a 50quid 'bog in a box' which i got from a local pluming shop.

Bit of a ball ache but I took it back to the shop and got a new one. This now works perfectly.
Not being a plumber I was worried I was doing something stupid but turned out to be a faulty unit.

I suppose you get what you pay for!