Nephros, Inc. Common Stock, also called Nephros, is a medical device company, which engages in developing and selling liquid purification filters and an on-line mid dilution hemodiafiltration system. Read More The company operates in two segments: Water Filtration and Renal Products. The Water Filtration segment includes both the medical device and commercial filtration product lines. The Renal Products segment comprises of SRP, which is focused on the development of medical device products for patients with renal disease, including a second-generation HDF system for the treatment of patients with ESRD. Its ultrafilters are used in dialysis centers for the removal of biological contaminants from water, bicarbonate concentrate and blood. The company was founded on April 3, 1997 and is headquartered in South Orange, NJ.