Nilfisk VL500 dual filter demonstration video
The Nilfisk VL500 wet & dry vacuum cleaner has a special filter design which enables the separate wet and dry filters to operate at the same time, for maximum performance without the need to change filters. This video demonstrates the filter operation. Choose from the 55 litre or 75 litre tank options.
See product information for the Nilfisk VL 500-55 here