I can unscrew the top, which is around the push-button, but then it only comes up so far before it stops because the button is held in place with the bit it's connected to inside.

I want to open it up to find out why it's taking a long time to fill (I've looked up some of the possible answers on here) but can't actually get access to it. Any help is much appreciated.

Dom Robinson, September 2009

Ever thought of going back to B&Q and asking to see one? They are quite helpful.

Bob, September 2009