Whole House Reverse Osmosis by Crystal Quest Our Whole House Reverse Osmosis System is the highest performing RO System on the market backed by more than 25 years of experience. It has been designed and engineered to provide purified water throughout your entire home for many years if properly maintained. As long as the prefilters and membranes are changed regularly, these systems should last from 15-20 years. All our RO systems are designed to be modular, require little operational maintenance, and be economical. For added protect