EcoWater Systems | ERO175 Reverse Osmosis Drinking Water System Ultra-Pure, Bottled-Quality Drinking Water Direct from Your Tap Enjoy safe, refreshing, and pristine drinking water right at your kitchen sink with the EcoWater ERO175 Reverse Osmosis (RO) System. Engineered by EcoWater Systems of Eastern WA & Idaho, this compact, under-sink drinking water system forces tap water under pressure through an advanced semipermeable membrane, separating microscopic contaminants from your water and delivering crisp, great-tasting hydration on demand. Whether you rely on municipal water or a private well in Eastern Washington or Northern Idaho, the ERO175 acts as the ultimate point-of-use safeguard for your family’s health and wellness.