I have a Duravit toilet with a Geberit flushing mechanism. I have recently discovered a continual hissing sound coming from the cistern. It will stop occasionally when I flush the toilet but always restarts when I switch on a tap, shower or the washing machine. I have 3 toilets iin the house and the sound only occurrs in the main bathroom.
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hi i would suggest your ball valve in the cistern needs ajusting remove the top of the cistern you will see the ajustment screw at the end fo the ball **** arm hope this helps
Hi
I have exactly the same problem, in fact it could have been me writing this - 3 toliets fine, main bathroom hisses.
The Geberit flushing ciphen on the left (the smaller one) has been replaced and there is still a problem. If you look carefully,the water level needs to come up over the lip of an opening on the Geberit part and this causes the valve mechanism to shut off and stop the hissing. It is fine for about 40 minutes and then the hissing starts again if you don't flush it. The reason is that the water level has gone down but there is no obvious signs of where the water is going. It could be that the central flush mechanism is leaking slightly. I am going to replace this part next.
If I were you I'd see if you are getting any water leakage into the pan when toilet not in use to see if the water level in the cistern is going down
James T
The cistern lid is held down by the chrome assembly (which includes the two buttons that you press to make the toilet flush) sticking up in the middle of the lid. You need to unscrew that (anticlockwise) to be able to lift the lid off, to get to the inlet valve, etc.
If the water is running in very slowly, chances are high that the small screen filter under the inlet valve is partially blocked. Working inside the cistern, you need to unscrew the inlet valve assembly (noting the order in which the various parts come out!), then unscrew the cranked fitting just under that, to get the screen/filter.
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