1. Rainwater is led onto the filter cartridge.
2. The filter cartridge cleans the rainwater. The cleaned rainwater is led through the calmed flow inlet into the rainwater tank.
3. Because of the smooth surface structure of the filter the dirt is quickly rinsed away into the sewer.
Due to the horizontal position of the filter cartridge, the filter gets dirtier more rapidly as a filter cartridge with steep inclination. We therefore recommend using the 3P Backwashing Device and constant cleaning with detergent and brush in order to degrease the filter sieve. Pollen are containing much grease thus the water rolls off on the surface.