Good answers to
frequently asked questions - FAQ's
Questions and answers
My rainwater harvesting system no longer automatically switches to fresh water supply when the cistern is empty. What can I do?
If the rainwater harvesting system does not switch to drinking water mode for a longer period, the installed check valve may be stuck and no longer opens due to the water pressure. To solve this problem, please proceed as follows:
1. Remove the cover of the refill container. In the middle, you should see a valve that is covered by a protective sieve (see picture).
2. Try pressing the valve down with an unfolded paper clip. The wire of the unfolded paper clip will fit through the protective sieve.
If the valve is stuck and cannot be released, we can replace it in our service center. Please contact us at info@wisy.de.