EDEN 5-Stage Alkaline Reverse Osmosis Water System - Removes contaminants, adds minerals and raises pH (100 GPD) 100 gallon per day TFC Reverse Osmosis (RO) membrane Automatic Shut-Off Valve and NSF listed 3.2 gallon storage tank Chrome finish Upgraded Faucet included with its mounting hardware. Non air Gap type. Brine to Pure Water Ration 3:1 ratio (flow restrictor 800 mL) alkaline-mineral cartridge is stage 5 to raise pH and improve taste