Infiltration shafts and chambers from Finger-Beton support the underground infiltration of rainwater. Type B infiltration shafts are assembled from standard civil engineering products - with porous, water-permeable infiltration rings, shaft cones and shaft covers. Our infiltration shafts are perfect for smaller connected areas and/or with well-drained soil. They can be used to avoid bottlenecks in the sewer network and reduce the rainwater charge.