Nephros, Inc. (Nephros) is a commercial-stage medical device and commercial products company that develops and sells high performance liquid purification filters and hemodiafiltration (HDF) systems. The Company's filters, ultrafilters, are primarily used in dialysis centers for the removal of biological contaminants from water and bicarbonate concentrate, and used in hospitals for the prevention of infection from water borne pathogens, such as legionella and pseudomonas. The Company has approximately two product lines: HDF Systems and Ultrafiltration Products. Its products in HDF modality deliver therapy for End Stage Renal Disease (ESRD) patients. It offers ultrafilters for customers in hospitals and other healthcare facilities for filtration of water to be used for patient washing and drinking as an aid in infection control. The filters also produce water that is suitable for wound cleansing, cleaning of equipment used in medical procedures and washing of surgeons' hands.