is a metallic (copper/zinc) filter medium used to remove free chlorine, lead, iron, and hydrogen sulfide. It is usually mixed with granular activated carbon. KDF cartridges are expensive, but they usually last a long time. Another advantage is that KDF is mildly "bacteriostatic," meaning that it inhibits the growth of bacteria within the cartridge.
A copper/zinc alloy that, when incorporated into filter media, renders the media bacteriostatic. Safer and more benign than other compounds used for this purpose.
The trade name for a patened medium composed of high purity copper and zinc granules. KDF is capable of removing chlorine, soluble heavy metals, and other inorganic contaminents from water through the chemical reduction/oxidation (redox) process.