The North Star 5-Year In-Line Refrigerator Filter is the logical choice for residential homes, offering a long-lasting option that''''s easy to install that delivers cleaner, great-tasting water and ice-cubes from your refrigerator. With NSF certification ensuring maximum quality and great tasting water, this system delivers convenient performance. North Star''''s 100 years of expertise in water treatment will ensure top-notch performance and a responsive, U.S.-based customer service team, will offer reliable assistance for any inquiries or needs.