While you wait for answers, we may have found some information which could help you.
Click here for Grohe Cistern RepairGroheEAU2 Dual flush cistern. The large flush button keeps breaking off?
Grohe seals 14.11.30 4 DAL?
How do I remove the fitting for the flush on my hidden cistern toilet?
how do I change the bellows in the push button unit for the grohe cistern?
Have I been charged way to much for having a loo mended?
Grohe 42181 toilet filler valve leaking?