Answer: the filtering layer located at the bottom of the sump must be replaced twice a year, and also remove the debris and repair the cracks.
The sump, which is in fact an infiltration well, is a covered pit to prevent water infiltration into the ground. It therefore channels the small volumes of water in sloping ground and can be used, in certain cases, to recover the water which would be on your terrace. In theory, your sump can easily last four years without maintenance. But to ensure a certain longevity, there are a few little tips. Make sure your sump is far from high traffic areas and try to maintain it twice a year, replacing the filtering layer which is located at the bottom of the well. Also remove any debris and repair any cracks that may be on the berm and the well beds. Our practical garden videos