Onto my 2nd loo that’s currently turned off as it’s constantly flowing into the pan. Grohe concealed but with no flush plate. Flush panel removed. I attempted to pull out the flush valve to source a replacement but the stupid previous owner put the countertop on too low down and it won’t come out! Is it even worth chopping the unit up for just that? Should I look at replacing the whole cistern instead.. it looks like pneumatic flush button assembly isn’t made anymore. Going to need a plumber to come in that one as my isolation valve is leaking too. Head.. desk.. wallop.