CenTROL conventional gravity filters may be applied wherever cost-effective, space-saving conventional gravity filters are desired. CenTROL furnishes its own backwash water supply from in-service cells, so in most cases, backwash supply pumps are eliminated. CenTROL filters are used in hundreds of plants. They are preferred for their compact arrangement and simple operation. The CenTROL system reduces operating and installation costs, and they provide efficient, low-cost alternatives to conventional gravity filter designs.