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By alain B. (LE PORGE, France) on 17 Sept. 2020 :
By - C. (Flers en escrebieux, France) on 17 Sept. 2020 :
By alain D. (Hericourt, France) on 17 Sept. 2020 :
In case of severe weather such as a thunderstorm, the control tank can limit the flow of water. In the case of heavy rainfall, the water enters the tank with a maximum flow and leaves the tank at the top with a perfectly controlled flow.