I currently have a cistern that is gradually losing water to the bowl. When sufficient water has been lost then the 'fluidmaster' kicks in as the float has dropped enough within the cistern to instigate a flush. This happens every 20-25 minutes. Couple this with a touch of water hammer and its get's a bit annoying.

s martin, May 2006

I had the same problem. I took out the flush unit and reversed the rubber seal I found on the bottom. It had worn and was not flat but funnel like into the hole, so turning it the other way around made it flatten the funnel when in place on the bottom seal. I also found there was a small loose end of PTFE tape from the pipe joint connecting into the bowl. This was about 1.5 inches long and was sitting across the bottom seal of the cistern. This meant the rubber washer did not make an effective seal. I removed easily by cutting off this loose end.

Everything now works as intended. This may help you.

SimonP, June 2006

yes it is a push button.

s martin, June 2006

is it a push button???

mark, June 2006