While you wait for answers, we may have found some information which could help you.
Click here for Replacement Washer SmallReplacement of bellows in Grohe air button?
how do I change the bellows in the push button unit for the grohe cistern?
Grohe seals 14.11.30 4 DAL?
How do I remove the fitting for the flush on my hidden cistern toilet?
Grohe 42181 toilet filler valve leaking?
grohe toilet cistern leasks ?