Whole house backwashing sediment filters utilize a alumina-silicate, crystal, mineral material has surface micro-mineral projections with 0.25 to 10 micron spacing that effectively trap suspended solids in the water stream. A US Water backwashing filter has a dirt-carrying capacity that is three times the amount that a sand filter has. The filter granules physically filter and trap the suspended solids. In addition, the granules remove a wide range of colloidal and soluble, inorganic metallic, contaminants by surface absorption, chemical-binding, charge neutralization, coagulation, reactions and/or ionic, ion-exchange phenomena. If you have sand, silt or solids in your water or your water has a high degree of turbidity, then a backwashing sediment filter is the right choice.