While you wait for answers, we may have found some information which could help you.
Click here for Trickle Water CisternSlow fill of toilet cistern?
Grohe push button toilet attached to saniflow ?
Grohe 42181 toilet filler valve leaking?
how to take unit apart?
The push button on my Grohe Adagio stopped flushing ?
Grohe seals 14.11.30 4 DAL?