Filtec - Filter Sand

Filter sand is hard grained quartz or silica sand having no constituent and is not friable or liable to mechanical breakdown when subject to pressure. The sand contains no carbonaceous matter, clay or silt and the loss on acid washing and ignition in each case is less than 2% by weight. Its specific gravity is not less than 2.2 or more than 2.5, and is within the size range of 0.6 mm to 2 mm.