I have two dual flush Grohe toilets in my flat. Both are about 5 years old. Neither of these will flush (either long or short) unless you continue to hold the button in. I have taken the button panel off the front and the two 'vacuum' tubes appear to be connected correctly. Does anyone have any idea how to fix this? thanks!

Matt, November 2008

Any response to this? I have an identical problem. What needs to be replaced?

Paul Howland, January 2009

try National shower spares, they are grohe spares stockists and should be able to help 0845 126 4141 or visit www.showerspares.com, cheers

Gary, December 2008