The One Water Cartridge Tank is a revolutionary water filtration system that features easy-to-access top and bottom while offering several filtration connection options. The patented liner design allows for three optional opening connections which permits the use of a pressure release valve or control valve. This system is ideal for residential and small commercial applications. This Cartridge Tank is NSF 61 Listed and has been tested to 150 PSI operating pressure. Fresh Water System is proud to carry the NFS-PL20/10-HF replace cartridge.