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By Bernard P. (Labastide Marnhac, France) on 17 Sept. 2021 :
By laurent L. (Courcouronnes, France) on 16 Sept. 2021 :
By Uri B. (Villemur-sur-Tarn, France) on 16 Sept. 2021 :
In case of severe weather such as a thunderstorm, the control tank helps to limit the flow of water. In the case of heavy rain, the water enters the tank with maximum flow and comes out of the tank in the upper part with a perfectly controlled flow.