changing a concealed flush valve

[233sqn]

Hi all

I have a loo that doesn't flush unless i remove the panel and lift the flush valve manually. I guess i need to swap it out, but how do you get it out of a concealed cistern without pulling the unit apart? Is it a bayonet fitting that just comes out through access panel?

 

[mcmoby69]

Check the bellows, button and tubes are ok before you start faffing about with that.

 

[233sqn]

Thanks...I have checked it as best I can (ie visually) and it does work most of the time, but probably 1 in 20 flushes fails and i need to remove the cover and manually lift the valve. After this its ok again. I guess this rules out the bellows and button?