The Growonix GX400 is designed to flow 17 gallons per hour of pure RO water, with an astounding 2:1 ratio. High flow rates and water savings have never before been seen in a package so affordable and durable. Utilizing the most efficient membrane technology in the world, built with dual o-ring fittings, wrapped in our patented GX Series bracketing system, and equipped with a stainless steel liquid filled pressure gauge, the GX400 is a staple in every garden. Dual High Flow Cold Water membrane elements 2:1 system ratio - The most efficient in the industry! Electrogalvanized powder coated steel brackets Membrane flush kit 2.5" stainless steel liquid filled gauges One Eco Green Coconut Carbon filter rated for 16,000 gallons for chlorine reduction. Chloramine removal requires KDF85/CAT carbon filter High Flow pleated sediment filter, completely wash-able and reusable Auto Shutoff Valve: for positive automatic shutoff when using a float valve No additional pre-filters needed!