Grohe cistern, fix or replace?

[Gem1983]

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

 

[Ben-gee]

If it’s grohe adagio you can get all the parts still, has it got a plastic cradle straddling the top of the cistern?

 

[Gem1983]

If it’s grohe adagio you can get all the parts still, has it got a plastic cradle straddling the top of the cistern?

Hi yes I think that’s the one it is. It does have the cradle part. I can get that out and fight to get the flush valve released but there’s not a big enough gap between the top of the cistern and the counter to remove it!!
I now can’t do anything now if I turn the isovalve on, that leaks!
🤦🏻‍♀️

 

[Ben-gee]

Is it possible to remove the worktop?

In a similar situation I hacksawed a section from the side of the cistern, just enough to allow removal of flush valve and obviously keep it well above the water level!

You will most likely just need a new discharge piston, but get a whole flush valve if you don’t really know what you’re doing. Also check the condition of the bellows.

Tricky but not impossible when the cistern is too high, the alternative of course is to remove the pan - then remove the cistern for easy access to everything. When you put it back put it a little lower in the unit so future maintenance is easier.

 

[Shower Engineer]

The cistern hooks onto a bracet that sits on the wall at the top back of the cistern. You should be able to loosen the flush pipe nut, it is actually round and should only be hand tight, and then undo the mains supply. You can then lif the cistern off as long as you have around 20mm clearance. Repair the cistern, I think most parts are still available, and pop it back on. A bit fiddly but easier than renewing the entire cistern.

 

[Gem1983]

Thank you guys Think I need to get the plumber in for that one. I think all 3 loos need new flushes as the other 2 are doing it to a lesser extent.