The PuROLine series is a private label brand by wholesaler Good Water Warehouse and features 3, 4, and 5 stage RO systems in various flow rates. PuROLine reverse osmosis systems use semi-permeable membranes to rinse contaminants to the drain. High-quality, filtered drinking water is produced and conveniently stored in a sealed stank, and the lead-free faucet delivers an abundant supply of clear, clean, and fresh drinking water to you and your family.