Thanks for your reply.
It's not the overflow but searching other posts I'm guessing it could be tiny bubbles in the seal as it seems to be a problem with these units whether it's the Geberit 230, 240 or 260 which mine appears to be.
I'll isolate the cistern and give it a look this weekend and...
Hi
I have a patently quite old RAK slimline cistern and aged Geberit flush and fill assemblies, and one of these is leaking permanently into the pan. Occasionally causing the fill to trigger too.
I don't know which part to replace and assume (due to the fact I have a newer model of the same in...
Look I know this has been logged a hundred times but I can't find a solution that matches my RAK toilet.
Usual problem, won't stop filling, the blue "plunger" on the left does not reset.
What do I do please (other than isolate the water which I've already done)?
It was installed all of 6...