My Grohe air pressure flush toilet seems to lose pressure and occassionally won't flush at all via air pressure. I have checked the air flow lines and they appear clear. Any ideas on what it could be?

Annie Fulton, June 2009

I have exactly the same problem, also with a Grohe internal integrated cistern. I have tried de-scaling the unit and this did not help. I am coming to the conclusion that there is a lack of pressure in the hose, but am wary of taking it apart as it has been installed behind a wall!!

I eagerly await to see the answer to this question

Steve, June 2009