Geberit flush valve, can I replace without removing cistern?

Geberit flush valve, can I replace without removing cistern?

Geberit flush valve, can I replace without removing cistern?

Fitted this in 2008, and flush valve is getting stuck to open occasionally.
Any idea if this can be detached half way down and the main bit replaced from above, or is it a cistern off job? Thanks.

by 23vc

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