Reverse Osmosis (RO) system with holding tanks Loose Component Reverse Osmosis (RO) and Deionization (DI) System Potable Water Treatment System With Sulfur Removal and Reverse Osmosis (RO) Duplex Alternating Softeners Shipping Container with Potable Water Treatment System Skid Packaged Reverse Osmosis (RO) and Deionization (DI) System Triplex progressive flow softeners with re-circulation