Sand filters used to ban pending cases, turbulence and other particles from the raw water. The system works by placing gravel layers with different dimensions. Sand filters consist of different size granules gravel, quartz sand and anthracite (coal) in the upper layer which forms a multi-layered transition. While raw water moves from top to bottom, solids are separated from the water. So water will be cleared of solids and have a clear view. Sand filters are your most suitable solution for filtration in various capacities and qualities. These filters can operate manually or with different types of valves.