Flexible Screw Conveyors from Spiroflow Systems can accurately meter chemicals used for control of pH, bacteria, taste and odor. Chemicals such as hydrated lime, activated carbon and soda ash can be accurately dosed using loss-in-weight or volumetric metering, while eliminating dust and environmental contamination. The devices convey dosing chemicals from silos, bulk bags or bin hoppers to achieve accurate dosing rates as low as 2 pounds per hour. They convey in any direction from horizontal to vertical. They can be 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 from 2 to 88,000 pounds per hour. 704/246-0900; www.spiroflowsystems.com.