We may have found other answers which could help you.
Click here for Toilet Repair Replacement
Grohe 42181 toilet filler valve leaking?
grohe toilet cistern leasks ?
Short burst of water entering cistern ?
Have I been charged way to much for having a loo mended?
how do I change the bellows in the push button unit for the grohe cistern?
How do I remove the fitting for the flush on my hidden cistern toilet?