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I have a roca dual flush that constantly runs?

The problem seems to be with the central column. Is it just a case or tightening something or do i need a replacement column?
Mark, June 2007
It is a small valve at the bottom of the column that needs replacing. You need to order the part from Roca.

Paul, July 2007
rubber at the bottom is not closing fully. hold the valve half way down and turn it, it will come apart and on the bottom is a rubber ring take it off and turn it round and clean any scale off then replace.

hi-spec plumbing, June 2007