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$49.99
$193.99
iSpring F2US21B Direct Connect 4.5"x10" Undersink Water Filtration CTO Carbon Block and GAC+KDF Water Filter Replacement Cartridge Pack Set (F2US21B)
  • 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
    iSpring FG15B-KS GAC and KDF Carbon Filter Replacement Cartridge for Direct Connect Undersink Water Filtration System US21B, 10” x 4.5” (FG15B-KS)
  • 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.
  • Teaming up with carbon filters like iSpring FC15B, this filter removes the unpleasant taste or odor left in chlorinated water. They also tackle problems like turbidity, cloudiness, colors, bad taste, and odors like hydrogen sulfide that smells like rotten eggs.
  • Official 1st stage replacement filter cartridge for iSpring direct connect Point-of-Use(POU) undersink water filtration system US21B. Fits standard 10" big blue undercounter or whole house water filtration systems. Individually sealed for freshness.
  • Based on the contaminant levels in source water and your water use, we suggest that you change your filters every 8-12 months for ideal filtration performance. Hassle-free filter cartridge replacement is a breeze!
  • Please be noted that the system for which this filter works is NOT designed to reduce Total Dissolved Solids(TDS) removal and instead keeps minerals in your water. If you are interested in a filter that significantly reduces TDS, please consider our iSpring Reverse Osmosis (RO) systems RCC7 series or tankless RO500.
  • We offer tech and CS support via phone and email from Atlanta, GA. Contact our responsive and professional team for product selection to suit your water filtration needs and after-sale support to maximize your user experience. Now, and years to come, we will be right here and ready to help.
  • $49.99
    iSpring US21B Heavy Duty 2-Stage Undersink Water Filtration System with 10” x 4.5” GAC+KDF and CTO Carbon Block Filters, 1” Ports, Direct Connect Hoses Included (US21B)
  • [Heavy Duty Water Filter System] Made of quality material for all components and equipped with big blue 10” x 4.5” filters, this heavy duty undercounter water filter system is designed to provide you and your loved ones with a continuous on-demand supply of refreshing water whenever your kitchen faucet is on. No waste water. No tank taking up your under sink space.
  • [10"x4.5" Filters] 1st stage KDF plus GAC carbon filter(FG15B-KS) and 2nd stage CTO carbon block filter(FC15B) can remove up to 99% of contaminants, including chlorine, lead, mercury, and many other heavy metals. They also tackle problems like turbidity, cloudiness, colors, bad taste, and odors(e.g. hydrogen sulfide that smells like rotten eggs). A true shield that protects you and your family from ingesting harmful chemicals or contaminants in your tap water.
  • [Steady Water Flow] Thanks to the system’s connection design and its 1” inlet and outlet ports, you will experience less waiting time when filling up your glasses, pitcher, coffee pot, or cooking pots as the peak water flow rate is up to 15 GPM. Based on the contaminant levels in source water and your water use, we suggest that you change your filters every 6-12 months for ideal filtration performance.
  • [Easy DIY Installation] Comes with two 24-inch DIRECT CONNECT hoses that connect the system to the existing under sink incoming water supply and the cold water line of your kitchen faucet. Unlike reverse osmosis systems, you don’t need to spend time drilling a hole on your countertop for a RO faucet. Tool free. No mess. System installation and filter cartridge replacement are a breeze!
  • [TDS Note] Please be noted that the system 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 significantly reduces TDS, please consider our iSpring Reverse Osmosis (RO) systems RCC7 series or tankless RO500.
  • [Peace-of-Mind Support] We offer tech and CS support via phone and email from Atlanta, GA. Contact our responsive and professional team for product selection to suit your water filtration needs and after-sale support to fully enjoy your user experience. Now, and years to come, we will be right here and ready to help.
  • $193.99
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