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$46.79
$43.99
$43.99
$80.29
$69.99
$26.29
$55.99
$109.99
$17.20
$35.39
$21.99
$144.29
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$12.89
iSpring F7-CTO 10"x2.5" Standard Reverse Osmosis Water Filter 1-year Replacement Cartridges, 7-piece (F7-CTO)
  • 1-year supply of replacement filters for 5-Stage RO systems
  • Includes 7 filters
  • Fits 10" standard filter housings, compatible to most RO systems, includes Watts Premier, Flowmatic, PuROLine, Crystal Quest, Apec, and etc.
  • Individually wrapped, fresh from factory
  • Use CTO in both 2nd and 3rd stages
  • $46.79
    iSpring F7-GAC 10"x2.5" Standard Reverse Osmosis Water Filter 1-year Replacement Cartridges, 7-piece (F7-GAC)
  • Tested by independent third-party to meet NSF/ANSI standard, replacement filters for 5-stage reverse osmosis systems
  • Standard sized 10" x 2.5"
  • Fits iSpring RCC7, RCC7P, and most other RO systems that use standard sized filter housings including Flowmatic, PuROLine, Crystal Quest, and Apec
  • Includes 2x FP15 sediment filters, 2x FG15 GAC filters, 2x CTO carbon filters, and 1x FT15 post carbon filter. (No RO membrane included)
  • Each filter is individually wrapped
  • $43.99
    iSpring F7RO 10"x2.5" Standard Reverse Osmosis Water Filter 1-year Replacement Cartridges, 7-piece (F7RO)
  • Tested by independent third-party to meet NSF/ANSI standard, replacement filters for 5-stage reverse osmosis systems
  • Standard sized 10" x 2.5"
  • Fits iSpring RCC7, RCC7P, and most other RO systems that use standard sized filter housings including Flowmatic, PuROLine, Crystal Quest, and Apec
  • Includes 2x FP15 sediment filters, 2x FG15 GAC filters, 2x CTO carbon filters, and 1x FT15 post carbon filter. (No RO membrane included)
  • Each filter is individually wrapped
  • $43.99
    iSpring F9D 10"x2.5" Standard 1-Year Water Filter Replacement Cartridges with Deionization Filters, 9-piece (F9D)
  • 9 pieces of 10" x 2.5" replacement water filters included, good for 1-year supply
  • Individually wrapped to keep freshness
  • Fits iSpring RO DI Systems and most other brand name RO DI systems
  • Reduces RO water's TDS level to 1ppm-0ppm; Works for aquarium, reef and fish tank
  • $80.29
    iSpring F9K 10"x2.5" Standard 6-Stage Alkaline Reverse Osmosis Water Filtration Systems 1-Year Filter Replacement Cartridges, 9-piece (F9K)
  • Tested by independent third-party to meet NSF/ANSI standard, replacement filters for 6-stage reverse osmosis systems
  • Standard sized 10" x 2.5"
  • Fits iSpring RCC7AK, RCC7P-AK, and most other RO systems that use standard sized filter housings including Flowmatic, PuROLine, Crystal Quest, and Apec
  • Includes 2x FP15 sediment filters, 2x FG15 GAC filters, 2x CTO carbon filters, 1x FT15 post carbon filter, and 2x FA15 alkaline filters
  • Each filter is individually wrapped
  • $69.99
    iSpring FA15 10-inch Inline 3-Layer Alkaline Replacement Water Filter Cartridge (FA15)
  • The RO membrane removes not only harmful pollutants but also minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7.0 or below. Alkaline filter produces pH8-9 alkaline water with restored minerals such as natural calcium and magnesium.
  • The Alkaline filter can be added to any under-sink water filter or RO system. 6 filters included.
  • Raises pH level to 8-9
  • Updated FA15 alkaline filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us
  • $26.29
    iSpring FA15X3 iSpring Alkaline Water Filter Replacement Cartridge, Pack of 3 (FA15X3)
  • The RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7.0 or below. Alkaline filter produces pH 8-9 alkaline water with restored minerals such as natural calcium and magnesium.
  • The Alkaline filter can be added to any under-sink water filter or RO system. 3 filters included.
  • Raises pH level to 8-9
  • Updated FA15 alkaline filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us
  • $55.99
    iSpring FA15X6 iSpring Alkaline Water Filter Replacement Cartridge, Pack of 6 (FA15X6)
  • The RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7.0 or below. Alkaline filter produces alkaline water with restored healthy minerals such as natural calcium, magnesium, and potassium ions, which ph-balances the RO water
  • Experience clean and good-tasting water every time you turn on the faucet
  • The Alkaline filter can be added to any under-sink water filter or RO system. 6 filters included.
  • Raises pH level
  • Updated FA15 alkaline filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us
  • $109.99
    iSpring FC15 Standard 10 inch CTO Carbon Block Water Filter Cartridge Replacement, 5 Microns (FC15)
  • Reduces fine sediment and chlorine taste and odor in residential and commercial drinking water
  • Rated at 5 microns
  • Bonded Pac media with polyolefin pre-filter and polyethylene netting
  • Initial pressure drop of 3.4 psi at a flow rate of 1 gpm
  • Water temperature range of 40 to 180 degrees F (4.4 to 82.2 degrees C)
  • $17.20
    iSpring FC15B 5-Micron Coconut Shell Activated CTO Carbon Block Water Filter Replacement Cartridge for Under Sink Water Filter and Whole House Water Filtration Systems, 4.5" x 10" (FC15B)

    Using quality coconut shell carbon and highly compact fabrication tech, this activated carbon block CTO(Chlorine, Taste, and Odor) filter cartridge is designed and produced to achieve filtration efficiency and long filter life for 10" Whole House and Undersink Water Filtration Systems. Free of surfactants, binders, and adhesives. No leaching carbon ash.

    Knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is effective on herbicides and industrial solvents and other contaminants like trihalomethanes. Steady flow and high absorption.

    Filters up to 50,000 gallons depending on the use and feed water quality. Replace the filter every 6 months or every 50,000 gallons of water for ideal performance, depending on the quality of source water and daily water consumption.

    Fits standard 10"x4.5" big blue whole house and undersink water filtration systems. Official 2nd stage Carbon Block replacement filter cartridge for iSpring Under Sink Water Filtration System US21B as well as Whole House Water Filtration System WGB21B; 1st stage replacement filter cartridge for WGB21BM and WGB21B-PB. Individually sealed for freshness.

    Your worry-free shopping experience is backed by a 30-day money-back guarantee, extended warranty upon registration, and lifetime tech support from iSpring in Atlanta, GA at (678) 261-7611.


    $35.39
    iSpring FC15US Universal Coconut Shell Activated Carbon Block CTO Filter Replacement Cartridge for Reverse Osmosis RO and Under Sink Water Filtration Systems, 10" x 2.5", Made in USA (FC15US)
  • Individually wrapped, universal sized 10” x 2.5”, activated carbon block (CTO, Chlorine, Taste, and Odor) replacement filter cartridge for iSpring PH100, RO100 and most industry standard 10” reverse osmosis RO and under sink systems.
  • Made in the USA. This activated carbon block filter traps and absorbs chemicals and chlorine from the water.
  • This activated carbon block CTO filter cartridge uses coconut shell carbon and compact fabrication tech.
  • Average Filter Life: 6 -12 months, depending on your source water and usage.
  • We offer tech and customer service support by phone or email from our Georgia, USA location. Contact our knowledgeable team for help with product selection that fits your specific water filtration needs and after-sale support to simplify your user experience. We are happy to be here to support our customers now and in the years to come.
  • $21.99
    iSpring FC15X25 Box of 25 CTO Carbon Block Water Filter Replacement Cartridge, Compare to KX Matrikx, Pentek, OmniWater Filter Replacement Cartridge, Hydronix (FC15X25)
  • Individually wrapped, packed in 25 pcs per carton
  • 5 micron Rating
  • Made from coconut shell carbon
  • Fits 10" standard filter housings
  • Removes Chlorine and Organic chemicals
  • $144.29
    iSpring FC25 20” x 2.5” Water Filter Replacement Cartridges - CTO Carbon Block - Fits WCB32C & WCB32O Whole House Water Filtration Systems and RCB3P Reverse Osmosis System (FC25)
  • Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25 carbon block filter is specially designed to remove up to 99% of chlorine from water as well as various other contaminants that cause unpleasant odors and tastes.
  • Standard Size: Our filter set fits standard 20” x 2.5” housings, including brand name models.
  • Our FC25 CTO Carbon Block filters are made of coconut shell carbon to increase filtration efficiency and extend filter life. They are tested by an independent third-party to meet NSF/ANSI standards. The filters have a capacity of 30,000 gallons of water, enough to supply a family of four with clean water for half a year. Water flow: up to 12 GPM.
  • Peace of Mind Customer Service: Register online to activate your extended manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
  • Please Note: The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS). If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $32.09
    iSpring FC25B 20” x 4.5” Water Filter Replacement Cartridges - CTO Carbon Block - Fits Standard 20” x 4.5” Whole House Water Filtration Systems - Reducing up to 99% Chlorine - Pack of 1 (FC25B)
  • Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block filter is specially designed to remove up to 99% of chlorine from water as well as taste and odor compounds.
  • Standard Size: Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • Our FC25B CTO Carbon Block filters are made of coconut shell activated carbon to increase filtration efficiency and extend filter life. Activated carbon is an effective adsorbent because it is a porous material and provides a large surface area to which contaminants may adsorb. They are tested by an independent third-party to meet NSF/ANSI standards. Water flow: up to 15 GPM.
  • Peace of Mind Customer Service: Register online to activate your manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
  • Please Note: The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS). If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $51.99
    iSpring FC25BX2 20” x 4.5” Water Filter Replacement Cartridges - CTO Carbon Block - Fits Standard 20” x 4.5” Whole House Water Filter Systems - Reducing up to 99% Chlorine - Pack of 2 (FC25BX2)
  • Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block filter is specially designed to remove up to 99% of chlorine from water as well as taste and odor compounds.
  • Standard Size: Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • Our FC25B CTO Carbon Block filters are made of coconut shell activated carbon to increase filtration efficiency and extend filter life. Activated carbon is an effective adsorbent because it is a porous material and provides a large surface area to which contaminants may adsorb. They are tested by an independent third-party to meet NSF/ANSI standards. Water flow: up to 15 GPM.
  • Peace of Mind Customer Service: Register online to activate your manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
  • Please Note: The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS). If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $75.99
    iSpring FCB500 Carbon Block Filter Replacement for RO500 Tankless Reverse Osmosis Water Filtration System (FCB500)
  • Dedicated last stage carbon block filter for iSpring RO500 tankless reverse osmosis system. 
  • Made with quality coconut shell activated carbon block.
  • Further polishes filtered water and enhances the taste of water. 
  • Experience clean and fresh water every time you turn on the real-time TDS monitoring faucet of your RO500.
  • Lasts for up to a full year, depending on the quality of source water and daily water consumption. 
  • Quick and easy filter change. No tools required.
  • Backed by a 30-day money-back guarantee with lifetime CS and tech support from Atlanta, GA USA.
  • $25.99
    iSpring FCRC15B Lead Reducing Replacement Water Filter, 10"x4.5" (FCRC15B)
  • This filter (FCRC15B) is specially designed for lead reducing. It features a filtration capacity of up to 80, 000 gallons of water, reducing lead level from 100 ppb to 15 ppb (the EPA standard for drinking water) and less.
  • Being the official 2nd stage filter for iSpring WGB21B-PB, FCRC15B also fits standard 10” x 4.5” housings from most brand name models.
  • The cartridge lasts up to 3 times longer than conventional media. It also has little impact on water flow (up to 15 GPM) and requires little maintenance.
  • Backed by a 30-day money-back guarantee and extended manufacturer warranty upon warranty registration at iSpring. Lifetime tech support(678-261-7611) from Atlanta, GA USA.
  • Unlike an RO system, this system will NOT reduce Total Dissolved Solids (TDS), and instead keeps minerals in your water. If you are interested in a filter that removes TDS, please consider our iSpring RO systems.
  • $85.99
    iSpring FCRC25B Big Blue 20” x 4.5” Water Filter Replacement Cartridge Lead Reducing (FCRC25B)
  • Protect Your Family and Household Appliance from Lead: Our filter (FCRC25B) is specially designed for reducing lead. This filter features a capacity of 15, 000 ppm for lead, reducing lead to below 15 ppb (the EPA standard for drinking water).
  • Standard Size: Our filter fits standard 20” x 4. 5” housings, including brand name models.
  • Peace of Mind Customer Service: Register online to activate your manufacturer and life-time free tech support from U. S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
  • Please Note: The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS). If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $149.99
    iSpring FD15 DI Deionization Filter RO/Aquarium 10" x 2.5", Clear (FD15)
  • Re-fillable DI filter for RO DI system
  • 2.5" x 10" inline filter
  • Fits most RO DI systems, including brand name models
  • Refill 0 ppm Ion DI(De-Ionized), remove hard water material from the water and create 0-1ppm
  • Reducing TDS level in the water
  • Easy to add-on
  • $26.29
    iSpring FDF1 Faucet Filter Replacement Cartridge for DF1/DF2 Series Water Filtration System, 500 Gallons (FDF1)
  • Replacement faucet filter for iSpring DF1/DF2 Faucet Mount Filter System. Get your filtered water right from your tap for drinking, cooking, and washing.
  • iSpring FDF1 faucet filter can reduce chlorine, chloramine, cysts, lead, mercury, lindane, atrazine, and many other contaminants in water from faucets in your kitchen sink, bathroom sink, or RV sink. 
  • Thanks to this filter cartridge, iSpring DF1/DF2 series sink water filter faucet can deliver up to 500 gallons of clean filtered water. This means that you will only need to change your faucet water filter once every 6-8 months. 
  • Up to 1.5 GPM filtration rate; nice and steady flow of water.
  • Easy tool-free change in a few minutes. 
  • 30-day money back guarantee; lifetime tech support from iSpring at (678)261-7611.
  • $12.89
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