Ontario, Calif.-based Vertex Water Products announces a new five-stage reverse osmosis system, which has been specifically designed with the premium features customers want and dealers appreciate. The EasyPur RO system features easy twist-off filter cartridges, encapsulated RO membrane and postfilter designed to make installation and replacement quick, easy and sanitary. The EasyPur has five stages of filtration to ensure premium water quality yet easily fits in the space of a four-stage system.