Why a close coupled toilet cistern leaks?

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A problem many people encounter is that, the first time they flush a newly fitted close coupled toilet cistern, it leaks. This is such a common problem and 99% of the time the answer is the same. The cistern needs to be fitted at exactly 90 DEGREES to the toilet pan. This allows the large rubber ring washer, or doughnut as it is called, to be squashed flat between the two parts of the toilet. If the cistern is leaning over, even a little, one side of the doughnut lifts and, with a lot of water pressure, the leak is exposed.

If necessary box out the back of the cistern wall to make sure the unit is square.

The close coupling kit below shows the doughnut and the fixing bracket underneath. Make sure, having sat the doughnut on square, that you tighten the bracket nuts equally otherwise you will get the same problem.


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