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Reverse Osmosis Drinking Water System:
First filtration: 5u PP fiber filter element is spray-melted by polypropylene under high temperature. It mainly removes big granule sand, alga, iron rust and phosphor in water. We recommend it should be replaced every 3 months. Second filtration: granule activated carbon has strong absorption ability, it mainly absorb smells, remaining chlorine and chloride. We recommend it should be replaced every 6 months. Third filtration: sinter activated carbon further absorb the impurities and smell in water. We recommend it should be replaced every 6 months. The forth filtration: RO anti-infiltration membrane is the middle part of water purifier. Its aperture is only 10-6, it can filter heavy metal ion, bacterium, and small granule dissolves, chemical agents in water. We recommend it should be replaced every 12 months. The fifth filtration: post position activated carbon can adjust the taste of water, keep the freshness of purified water. We recommended it should be replaced every 6 months.
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