FILMTEC HSRO-4040-FF Membrane Elements FILMTEC HSRO heat sanitizable reverse osmosis membrane elements deliver outstanding quality water with the added capability to withstand sanitization with hot water. HSRO elements, manufactured on advanced automated equipment, have the highest active membrane area in the industry. This high area allows system designs with either lower operating flux or cost savings from fewer membrane elements. The full-fit configuration minimizes stangnant areas and is optimal for applications requiring a sanitary design. All components comply with FDA standards.