Our 75 GPD membrane fits most standard residential style membrane housings. Your purchase includes one 75 GPD Thin Film Composite membrane with a 1 year Warranty. In other words if your membrane fails within 1 year we will replace it at no cost to you!FILMTEC reverse osmosis membrane elements for home drinking water are the industry’s most reliable. Advanced membrane technology and automated fabrication allow these elements to deliver consistent performance that equipment suppliers, water treatment dealers, and residential customers can rely on. FILMTEC elements are shipped dry for convenient handling and long shelf-life. These elements are NSF/ANSI Standard 58 listed. Equipment suppliers can take advantage of FilmTec’s Standard 58 listing and participation in the NSF Data Transfer Protocol to reduce costs for reduction claims for their systems. FILMTEC home drinking water elements are rated at 50 psi and will purify about 20% more water than competitive elements rated at 60 psi1 75 GPD TFC membrane (Dow Filmtec)