I have a Gerberit Dual Flush (see image attached) which is running very slightly into the pan at all times. I have changed the bottom silicon washer for a new one, but it continues to run slightly. Is there anything I can check, perhaps on the siphon?
There may be a seal under the flush valve to cistern that needs replacing ,or it may just need tightening up. Does the valve move on the cistern a little ?
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