Abstract: An improved structure of a deionized water filtration unit in a KD frame comprised of a shelf, two posts, two footings, and a face panel locked to one another allowing wall-mounting with the shelf or floor standing-alone on the floor assembly; the KD frame permitting reduced packaging volume for easier handling and lower freight; an adapter board being locked to the shelf to pool external conduits and connectors; a connector block being provided on a control box, and corresponding terminals being separately provided to each component for easy identification distinguished themselves in wording or color to facilitate DIY process for the end-user.