Flexible Screw Conveyors from Spiroflow Systems can help accurately meter chemicals used for pH, bacteria, taste and odor control. Chemicals such as hydrated lime, activated carbon and soda ash can be accurately dosed using either loss-in-weight or volumetric metering, while eliminating dust and environmental contamination. They easily convey dosing chemicals from silos, bulk bags or bin hoppers to achieve accurate dosing rates as low as 2 pounds per hour. They are flexible and can convey in any direction from horizontal to vertical, routed around fixed obstacles and equipment, and from one room to another through small wall openings. They require minimal maintenance, are easy to clean and dust-free, and can operate at rates of 2 to 88,000 pounds per hour. 704/246-0900; www.spiroflowsystems.com.