Established in 1977 by Rick Holder, Der-Kel has technical representatives serving the Southeastern United States and beyond, including office buildings, hospitals, schools, government buildings, manufacturing, lumber mills and more. Der-Kel facilities are located in Chattanooga, TN and Gastonia, NC.

Der-Kel provides a combination of experience, expertise, service and economy unmatched in the water treatment industry. We offer a full line of specially formulated scale and corrosion inhibitors, biocides and waste treatment products designed for a program specifically tailored to your systems.