While you wait for answers, we may have found some information which could help you.
Click here for Cistern Leaks FlushThe push button on my Grohe Adagio stopped flushing ?
Grohe push button toilet attached to saniflow ?
How do I remove the fitting for the flush on my hidden cistern toilet?
grohe toilet cistern leasks ?
Replacement of bellows in Grohe air button?
Grohe 42181 toilet filler valve leaking?