Most reputable filtration systems, replacement cartridges and plumbing products intended for use in potable water systems are certified by NSF—an independent not-for-profit organization that is committed to public health, safety and protection of the environment. The NSF has developed national standards for food, water, air and consumer goods, all of which are recognized world-wide. This certification, which is displayed on a product’s label, provides assurance that the system has been independently evaluated to confirm it will perform as intended and is safe for contact with drinking water.  Great caution should be used when considering a product that is not NSF certified.  At best, without NSF certification, there is no way to validate that product’s claims, at worst the product could actually be harmful.  For these reasons West Carolina Water Treatment only carries products and components that are NSF  certified.  For further information on NSF certification please visit the NSF Web site at www.nsf.org.