The Garantia water collector, with a capacity of 210 liters, is available for 23.90 euros on the Castorama site. When it starts to rain, the rainwater collector goes into action on its own.
It is a totally passive accessory that, once installed in your garden or near your home, no longer requires any effort of use. You can use it throughout the year, so you don't have to run tap water for your watering sessions. In summary, this is an interesting investment, to be made at Castorama as long as there is stock left.