An RO (Reverse Osmosis) water purifier uses advanced membrane filtration to remove dissolved salts, heavy metals, chemicals, fluoride, nitrates, and other dissolved impurities from water. Water is forced through a semi permeable membrane that blocks contaminants while allowing purified water to pass through. Combined with filters such as a sediment filter, activated carbon filter, and UV or UF purification, an RO system delivers healthier, better tasting water for homes and businesses.