employs a twin media tank designed to achieve effective water treatment in 24-hour demand applications. The ATW twin system series offers 20,000- to 300,000-grain capacities with flow rates to 40 gpm, while providing iron, manganese and pH correction. Controls are fully adjustable with the choice of electronic or mechanical metered regeneration activation. The control valve features a Teflon-coated, solid brass piston and corrosive-resistant spacers and seals. Tanks are constructed of non-corrosive fiberglass. An in-line chlorine generator is available for automated removal of iron and sulfur bacteria from the media bed. Water-Right Inc.