Translations:Versickerung und Retention/51/en
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Vortex throttle
A spiral stream of variable strength with a central rotating air core is formed by the tangential feed in the vortex throttle depending on the water level. However this does not lead to a continuous throttle outflow. The vortex throttle has the advantage of requiring less space and lower risk of blockages due to the larger remaining cross-section compared to the other throttle types. These advantages are rarely relevant with decentralized rainwater retention.
