iSpring F2US21B Direct Connect 4.5"x10" Undersink Water Filtration CTO Carbon Block and GAC+KDF Water Filter Replacement Cartridge Pack Set

  • As the official replacement filter set for iSpring direct connect undersink water filtration system US21B, this economical filter pack consists of one 10"x4.5" CTO carbon block filter(FC15B) and one 10"x4.5" GAC+KDF water filter(FG15B-KS). 
  • 1st stage FG15B-KS 10” x 4.5” compound filter is designed to remove chlorine, lead, iron, mercury, hydrogen sulfide, THMs, chloride, chloramines, herbicides, nitrate, odors, and other contaminants.
  • Using high quality coconut shell carbon and highly compact fabrication tech, 2nd stage CTO filter FC15B knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on Organic Compounds like herbicides and industrial solvents and other contaminants like trihalomethanes.
  • Individually sealed for freshness. Depending on source water quality, replace the filters every 8-12 months to achieve optimal performance. Please refer to our manual and our helpful YouTube videos for filter change tips if needed.
  • The under counter water system this filter pack works for is NOT designed to reduce Total Dissolved Solids(TDS) removal and instead keeps essential minerals in your water. If you are interested in a filter that removes TDS, please consider our iSpring Reverse Osmosis (RO) systems such as RO500, RCC7, RO100 and more.
  • Your risk-free shopping experience is backed by a 30-day money-back guarantee, extended manufacturer warranty, and lifetime tech support from iSpring in Atlanta, GA.
  • $65.99
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    As the official replacement filter set for iSpring heavy-duty direct connect undersink water filtration system US21B, this replacement filter pack F2US21B consists of one 10"x4.5" CTO carbon block filter(FC15B) and one 10"x4.5" GAC+KDF water filter(FG15B-KS), making iSpring US21B a great water filtration system to provide you and your loved ones with a continuous on-demand supply of refreshing water whenever your kitchen faucet is on.
    • Availability: In Stock
    • Model: F2US21B

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