The iSpring SF1S and SF1W replacement cartridge combines KDF-55, calcium sulfite, and activated coconut shell carbon with two layers of micro-filtratration to provide pure water in any temperature.First layer of micro-filtration removes sediment, rust, sand, and other solids.KDF removes up 99% of chlorine, heavy metals, and inhibits the growth of bacteria, algae, and fungi.Calcium sulfite further removes chlorine and heavy metals such as iron, copper.Activated Carbon is effective at removing organic materials, THMs, and even further reduces chlorine.Final layer of micro-filtration captures any remaining solids and carbon grains.Please Note: You may experience reduced water flow if your source water has high levels of sediment or if you are on well water. It's recommended that you flip the filter cartridge over, flush with hot water to remove sediment and put it back to the original position whenever you notice a reduced flow.
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