proud past collectors and verrieseler for surface water with delay

摘要

The sealing element is in the form of a stone which has the external form of one or more connected individual stones of all existing paving stone types and consists of concrete or other permanently rigid materials. Through the arrangement of several water inlet opening rows one behind the other and which next to each two dirt collection channels have several water inlet openings on the raised middle wall, the paving stone insert can also undertake the function of a dirt collection grill.