My wc overflows into the bowl about every 20 flushes and can be stopped if I press the button again.
The system is 5 years old and has a dual flush mounted on the wall.
How can I stop this from happening?
I am worried as I am on a water meter.

  • Hello, and welcome to Home Improvement. It's hard to understand what you mean. Would you add a picture of the setup, and indicate more clearly what the problem is? Thanks. – Daniel Griscom May 11 at 14:38

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