While you wait for answers, we may have found some information which could help you.
Click here for Grohe Toilet FlushHave I been charged way to much for having a loo mended?
Slow fill of toilet cistern?
How do I remove the fitting for the flush on my hidden cistern toilet?
The push button on my Grohe Adagio stopped flushing ?
grohe toilet cistern leasks ?
how do I change the bellows in the push button unit for the grohe cistern?