Pentair X-Flow is the world leader in ultrafiltration capillary membranes and additionally manufacturer of microfiltration and nanofiltration capillary membranes. Typical applications of these membranes include the (pre)filtration of potable water, waste water and beverages, such as wine, beer, milk and cider. The WaterNexus program has interesting synergies with Pentair X-Flow, in finding a balance between the supply and demand of salt and fresh water for municipal and industrial markets. Newly developed capillary membranes based on current Pentair X-Flow membranes can definitely provide a safe, sustainable and affordable production method for potable water. These tight nanofiltration membranes should retain over 90% to 95% NaCl to ensure a successful project.