TheHydranautics ESNA1-LF-LD Low Fouling Nanofiltration Membraneis a high performance nanofiltration membrane for softening applications and the removal of pesticides, bacteria and viruses. The ESNA1-LF-LD is 8″ in diameter and 40″ in length. It provides 50-90% salt rejection with ultra-low pressure operations, increased energy savings, and significantly lowering installation and operating costs. It uses a patented 34 mil thickness feed spacer that prevents colloidal fouling and increases the effectiveness of membrane cleaning.