WATER-AIR FILTERING SYSTEM OF DUST PARTICLES The Water Air Filtering System is an exclusive DENTALFARM patent that, thanks to the combined action of water and air pressure, eliminates up to 99.8% of the dust particles originated during the blasting process. This model, entirely made of stainless steel, is to be installed on the floor beside the workbench and it is also suitable for blasting equipment not manufactured by Dentalfarm.