The Growonix EX800-HFT is designed to flow 36.5 gallons per hour of pure RO water with an astounding 1:1 ratio - High flow rates and water savings never before seen in a package so affordable and durable. Utilizing the best membrane technology in the world (98.5% rejection), wrapped in our EX Series patented bracketing system, our premier flagship is a mobile powerhouse. A pair of liquid-filled stainless steel pressure gauges informs when it's time to change the pre-filters. A manual flush valve allows you to clean the membrane, purging out pollutants that could otherwise add buildup to the system. Flushing adds considerable life to the membrane as well.