Ideal H2O Premium 3 Stage RO System w/Upgraded Catalytic Carbon Pre Filter + PSI Gauge - 200 GPD Reverse osmosis is one of the most cost effective and efficient ways to remove the majority of all contaminants from your water Ideal H2O Catalytic Reverse Osmosis Water Filtration Systems produce up to 200 gallons per day of ultra-pure, low parts per million (PPM) water These 3 Stage RO systems remove up to 98% of chlorine, 80% of chloramine, and 90% of sediment, silt and rust