The 600 GPD Reverse Osmosis System by Ecoviva is a high-quality under sink water filter system that offers pure water with a 2.5:1 pure to drain ratio. This system includes 8 stages of filtration, utilizing RO and PCT methods to remove over 1,000 substances from your water. With a maximum flow rate of 0.42 gpm and a capacity of 600 GPD, this tankless system is suitable for both commercial and household use. Made of durable plastic, this water filter is designed to last for 1-2 years and provides clean water for your daily needs.