The vortex fine filter 300 is installed below ground or indoors in the horizontal rainwater pipe. It filters the rainwater that flows in at the side of the filter unit and releases the filtered rainwater to the storage tank. The filter insert is made of a fine stainless-steel mesh with a mesh size of only 0.38 mm. Leaves, moss and other debris entrained in the rainwater are reliably filtered out and flushed away to the soak-away or drain.

See a link to a video on the operation of the filter
Rainwater cleansed by this filter is in a perfect condition for tank storage and for subsequent use on any property. It is also ideal for use in sports or equestrian facilities where large playing or riding surfaces need to be irrigated, or where large quantities of soft water are needed for cleaning purposes.
All WISY's vortex fine filters are perfect for filtering process water. They are already successfully deployed in the paper, textile and food industries.
The WFF 300 can process a water flow of up to 80 liters per second. This corresponds to the drainage volume for a projected roof area of 3,000 m² (32,292 sq.ft.) (for typical rainfall levels in Germany).
As with all WISY filters, the cross-sectional area for rainwater flow does not change at any point inside the filter, i.e. to ensure the free flow of water, the cross section is not restricted at any point. There is no risk of blockage even during torrential rainfall events which may flush large quantities of debris into the filter.
The vortex fine filter meets the requirements defined by EN 12056 / EN 752 and also conforms to DIN 1989.
All WISY filter inserts are designed for very low maintenance. It is virtually impossible for debris or dirt to stick to their smooth, stainless-steel surface. As a result, the filter inserts have a long service life. When necessary, the filter insert can easily be lifted out of the housing by means of the supplied lifting handle for cleaning by a high-pressure cleaner or in the dishwasher.
The filtering process by the vortex fine filter produces oxygen-rich water. The high oxygen content further enhances the water quality and inhibits the growth of undesirable organisms.
All WISY's vortex fine filters are perfect for filtering process water. They are already successfully deployed in the paper, textile and food industries.