We recently installed a Grohe Rapid SLX frame/cistern and connected it to a Grohe Sensia Arena wc/bidet.
We found out too late (after everything was tiled in and operational) that the 'pre-flush' and 'auto-flush' functions rely on Grohe part 46944001 (auto-flush kit).
Grohe have been rather...
I am Jeff Hammersley, someone who has gotten through 68 years without learning anything about plumbing or heating work.
Instead I spent my time as a 'professional button pusher' developing some of the largest databases in Europe.
Finally retired and trying to get the house which we left empty...