Both 3-stage and 4-stage reverse osmosis (RO) systems produce high-quality filtered water, but the 4-stage system includes an additional level of purification. In a 3-stage system, water passes through a PAC sediment filter (polypropylene and carbon) that removes sand, dirt, and other suspended solids and reduces chlorine. The water then moves through the RO membrane, which removes most contaminants, including dissolved solids such as lead and arsenic. Finally, the carbon rod filter provides a final polish by removing residual impurities, further improving the taste.
A 4-stage RO system is similar, but it adds an additional pre-carbon filter that removes chlorine, unpleasant tastes and odors, and VOCs. It also performs the final polish with a coconut carbon block filter to improve taste and odor. This post-filtration step enhances water clarity and helps eliminate any trace elements.
The main difference is the added layer of refinement. A 3-stage system is effective for most households, while a 4-stage system is ideal for those who want the cleanest, best-tasting water possible. Brio offers both systems to meet your water needs and preferences.
