The Nephros Dual Stage Ultrafilter (DSU), based on a patented medical grade Mid-Dilution Hemodiafilter, is a significant breakthrough in providing affordable and reliable water filter technology. The Nephros DSU is a .005 micron filter designed to remove a broad spectrum of bacteria, viral agents and biological toxins. These toxins include salmonella, hepatitis, HIV, Ebola viruses, legionella, fungi and e-coli. The DSU removes these harmful substances more effectively than other water filters currently on the market. In July 2009, the DSU for dialysis received it's FDA Medical Device (510k).