Wisy wff 100 vortex filter (wff 150/300 also available)

WWF 100/150

For cleaner rainwater for use in the house

·        For connecting to the drainpipe in the ground

·        The unique construction of the vertically placed fine filter washes out the large and fine dirt. Moss, leaves and insects are automatically washed into the drain.

·        Absolutely safe function

·        Over 90% of the rainwater is collected

·        Meets DIN 1986

·        Extension pipe (500 mm) is included.

·        The WFF, that is connected to a horizontal drain, filters the rainwater from the roof which is then led to a cistern.

·        The rainwater coming from the roof runs into the side of the WFF and is widely spread over the cylinder-shaped filter mesh. The rainwater from the roof is drawn through the vertically placed fine filter there, by exploiting the natural adhesion forces (surface tension), and is led through the outlet to the storage cistern, whilst the dirt is washed into the drain with the remaining water. Over 90% of the rainwater entering the WFF is filtered by this principle. 

·        The full cross-section of the rainwater drainages system remains continuously open in the WFF

·        There are no reductions in the cross-section of this appliance in which dirt and water can collect. This is especially important with torrential rainfalls where large quantities of water enter. In such cases over 50% of the filtered water is still led to the storage cistern. Excess rainwater is led directly into the drain.

·        The filter mesh largely cleans itself because practically nothing can remain on the vertical mesh.

·        Pitched roofs of slate, clay or concrete tiles are most suitable for collecting rainwater. Planted roof areas are less suitable because of the low water-collection efficiency. Non-sealed asbestos cement roofs are unsuitable. They not only cause environmental and health problems but their fibres tend to block the fine filter mesh. 

·        With the help of the blind insert the collection and filtering of the appliance can be stopped. The rainwater from the roof then flows directly into the drain (stopping the rainwater system, winter operation).