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Shower100 Replacement Cartridges (2-pack) are simple and quick to change. Independently tested and certified by NSF International against NSF/ANSI Standard 177 for the reduction of free available chlorine.
Rated capacity: 7,000 gallons each (14,000 gallons per 2-pack). For optimum results, cartridge should be changed every 5-6 months (based on an average of two 10-minute showers per day).
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