The key component is the flow regulator, which is installed in an inspection chamber and connected to the sewer system. It makes sure that only the permissible volume of water is released into the public sewer system. Excess water is retained in a local reservoir designed to promote infiltration and positioned so that, in the event of flooding, the excess water flows into an area which minimises the consequences, such as lawns, beds and parking areas.
The Statement from Ishøj Forsyning (public utility) is concerning a project using this solution.
The company uses a patented, specially designed flow regulator. The flow regulator itself is type CEV , but due to a concern that some property owners would remove the flow regulator if it was removable, like the type CEV with wedge coupling, the flow regulators for this specific purpose are permanently installed and equipped with a flushing hose which can be connected to a garden hose and flush away any clogged material.