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I have a toilet that was converted, using a conversion kit, to a dual flush (push button) toilet. In order to get a complete flush you have to hold the button in for the entire flush cycle until the tank empties. This applies for both the large and small flush.

What is happening? Is there any adjustment for these kits?

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It matter what model and some pictures would help. Educated guess, the flapper is not lifted high enough to keep itself open. Different dual flushes can work significantly different from each other, you may have even purchased a model that requires that. –  Jason Aug 4 '13 at 13:56

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