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iSpring F2WGB22BM 4.5” x 20” Whole House Water Filter Replacement Set - One Carbon Block Cartridge and One Iron & Manganese Reducing Cartridge - Fits WGB22BM (F2WGB22BM)
  • [Protect Your Family and Household Appliance from Iron, Manganese, and More] Our filter (FM25B) is specially designed for iron & manganese removal, reducing iron (MAX 3.0 ppm down to 0.01 ppm) and manganese (MAX 1.0 ppm down to 0.01 ppm). It lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process. The filter pack also removes sediment, chlorine, rust, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. It is tested by an independent third-party to meet NSF/ANSI standards. The filter has a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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. For well/pond water with very high iron/manganese please contact us for customized solutions. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $119.99
    iSpring 4.5x10 in. 5 micron Big Blue Carbon Block (CTO) Water Filter Replacement Cartridge for Whole House Water Filtration Systems, Pack of 4 (FC15BX4)

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

    [Exceptional Filtration Performance] 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. Steady flow and high absorption.

    [Long Filter Life] Each cartridge 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 optimal performance, depending on the quality of source water and daily water consumption.

    [Great Compatibility] Fits standard 10"x4.5" big blue whole house water filtration systems. Official 2nd stage Carbon Block replacement filter cartridge for iSpring whole house water filtration system WGB21B and 1st stage replacement filter cartridge for WGB21BM and WGB21B-PB. All 4 cartridges in the pack are individually sealed for freshness.

    [Peace-of-mind Customer Support] Your risk-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.


    $109.99
    iSpring F2WGB21B Whole House 4.5"x10" Water Filtration Big Blue High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B (F2WGB21B)
    • [Premium Quality Material and Multi-Layer Density Tech] Complying strictly with FDA standard (CFR-Part 177) and tested by independent third party against NSF/ANSI standard((NSF/ANSI 42) for material safety and water quality, iSpring premium 5-micron polypropylene sediment filter (FP15B) captures dirt, sand, silt, dust, rust, and scale particles and extends the life of CTO carbon block filter. The polypropylene construction provides superior chemical resistance and is not prone to bacterial attack.

    • [Highly Activated Carbon Block CTO Filter] Using high quality coconut shell carbon and highly compact fabrication tech, iSpring 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.

    • [Exceptional Filter Life] This filter pack can filter up to 50,000 gallons depending on the use and feed water quality. Replace the filters every 3-6 months to achieve optimal performance. Fine PP sediment filter and premium quality CTO filter not only bring clean and refreshing water to every faucet in your home, but also help prolong the lives of your water-using appliances and protect plumbing from sediment and scale buildup.

    • [Great Compatibility] This filter pack consists of 1x 10"x4.5"Sediment Filter(FP15B) and 1x 10"x4.5" CTO filter(FC15B). Fits standard 10" big blue whole house water filtration systems. Individually sealed for freshness.

    • [Peace-of-mind Customer Support] 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 at (678) 261-7611.

    $49.99
    iSpring F2WGB22B 4.5” x 20” Whole House Water Filter Replacement Set - One Sediment Cartridge and One Carbon Block Cartridge - Fits WGB22B - Reduces up to 99% Chlorine (F2WGB22B)
  • [Protect Your Family and Household Appliance from Sediment, Chlorine, and More] Say goodbye to smelly, bad tasting water! Our filters are specially designed to remove up to 99% of chlorine from water as well as sediment, rust, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 microns. The second stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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. For well/pond water with very high iron/manganese please contact us for customized solutions. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $89.99
    iSpring F2WGB22BPB 4.5” x 20” Whole House Water Filter Replacement Set - One Carbon Block Cartridge and One Lead Reducing Cartridge - Fits WGB22B-PB (F2WGB22BPB)
  • [Protect Your Family and Household Appliance from Lead and More] Our filter (FCRC25B) is specially designed for reducing lead. This filter features a high capacity of 15,000 ppm for lead, effectively reducing lead to below 15 ppb (the EPA standard for drinking water). Together with the carbon block filter, the filter pack also removes sediment, chlorine, rust, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. Our 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. It is tested by an independent third-party to meet NSF/ANSI standards. The filter has a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [Peace of Mind Customer Service] Register online to activate your manufacturer warranty and life-time free tech support. 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. For well/pond water with very high iron/manganese please contact us for customized solutions. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $169.99
    iSpring F3WCB32 2.5” x 20” Whole House Water Filter Replacement Set - One Sediment Cartridge and Two Carbon Block Cartridges - Fits WCB32C & WCB32O - Reduces up to 99% Chlorine (F3WCB32)
  • Protect Your Family and Household Appliance from Sediment, Chlorine, and More: Say goodbye to smelly, bad tasting water! Our filters are specially designed to remove up to 99% of chlorine from water as well as sediment, rust, herbicides, industrial solvents, and various other contaminants.
  • DIY Installation and Maintenance: Refer to our manual and our helpful YouTube videos for easy DIY installation. Our filter set fits standard 20” x 2.5” housings, including brand name models.
  • Top-Notch Quality: The first stage high capacity sediment filter is able to achieve filtration down to 5 microns. The second and third stage CTO Carbon Block filters are made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 30,000 gallons of water, enough to supply a family of four with clean water for half a year (depending on your water quality)
  • 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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • Out of Stock
    $67.99
    iSpring F3WGB32B 4.5” x 20” 3-Stage Whole House Water Filter Replacement Pack Set with Sediment and Carbon Block Cartridges Reduces up to 99% Chlorine (F3WGB32B)
  • [Protect Your Family and Household Appliance from Sediment, Chlorine, and More] Say goodbye to smelly, bad tasting water! Our filters are specially designed to remove chlorine from water as well as sediment, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 micron. The second and third stage CTO Carbon Block filters are made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $109.99
    iSpring F3WGB32BM 4.5” x 20” 3-Stage Whole House Water Filter Set Replacement Pack with Sediment, CTO Carbon Block, and Iron & Manganese Reducing Cartridges Fits WGB32BM (F3WGB32BM)
  • [Protect Your Family and Household Appliance from Iron, Manganese, and More] Our filter (FM25B) is specially designed for iron & manganese removal, reducing iron (MAX 3.0 ppm down to 0.01 ppm) and manganese (MAX 1.0 ppm down to 0.01 ppm). It lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process. The filter set also removes sediment, chlorine, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 micron. The second stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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. For well/pond water with very high iron/manganese please contact us for customized solutions. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $139.99
    iSpring F3WGB32BPB 4.5” x 20” 3-Stage Whole House Water Filter Replacement Pack Set with Sediment, Carbon Block, and Lead Reducing Cartridges Fits WGB32B-PB (F3WGB32BPB)
  • [Protect Your Family and Household Appliance from Lead and More] Our filter (FCRC25B) is specially designed for reducing lead. This filter features a high capacity of 15,000 ppm for lead, effectively reducing lead to below 15 ppb (the EPA standard for drinking water). Together with the sediment filter and carbon block filter, the filter set also removes sediment, chlorine, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. Our 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. The filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 micron. The second and third stage CTO Carbon Block filters are made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [Peace of Mind Customer Service] Register online to activate your manufacturer warranty and life-time free tech support. 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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $199.99
    iSpring F4WGB21B Whole House 4.5"x10" Water Filtration Big Blue High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B (F4WGB21B)
    • [Premium Quality Material and Multi-Layer Density Tech] Complying strictly with FDA standard (CFR-Part 177) and tested by independent third party against NSF/ANSI standard((NSF/ANSI 42) for material safety and water quality, iSpring premium 5-micron polypropylene sediment filter (FP15B) captures dirt, sand, silt, dust, rust, and scale particles and extends the life of CTO carbon block filter. The polypropylene construction provides superior chemical resistance and is not prone to bacterial attack.

    • [Highly Activated Carbon Block CTO Filter] Using high quality coconut shell carbon and highly compact fabrication tech, iSpring CTO filter(FC15B) knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on VOCs(Volatile Organic Compounds like pesticides, herbicides, and industrial solvents) and other contaminants like trihalomethanes.

    • [Exceptional Filter Life] This filter pack can filter up to 100,000 gallons depending on the use and feed water quality. Replace the filters every 3-6 months to achieve optimal performance. Fine PP sediment filters and premium quality CTO filters not only bring clean and refreshing water to every faucet in your home, but also help prolong the lives of your water-using appliances and protect plumbing from sediment and scale buildup.

    • [Great Compatibility] This filter pack consists of 2x 10"x4.5"Sediment Filters(FP15B) and 2x 10"x4.5" CTO filters(FC15B). Fits standard 10" big blue whole house water filtration systems. Individually wrapped for freshness.

    • [Peace-of-Mind Customer Support] 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 at (678) 261-7611.

    $89.99
    iSpring F4WGB22B 4.5” x 20” Whole House Water Filter Replacement Set - Two Sediment Cartridges and Two Carbon Block Cartridges - Fits WGB22B - Reduces up to 99% Chlorine - Pack of 2 Sets (F4WGB22B)
  • [Protect Your Family and Household Appliance from Sediment, Chlorine, and More] Say goodbye to smelly, bad tasting water! Our filters are specially designed to remove up to 99% of chlorine from water as well as up to 95% of sediment, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 microns. The second stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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.
  • $149.99
    iSpring F4WGB22BM 4.5” x 20” Whole House Water Filter Replacement Set - Two Carbon Block Cartridges and Two Iron & Manganese Reducing Cartridges - Fits WGB22BM - Pack of 2 Sets (F4WGB22BM)
  • [Protect Your Family and Household Appliance from Iron, Manganese, and More] Our filter (FM25B) is specially designed for iron & manganese removal, reducing iron (MAX 3.0 ppm down to 0.01 ppm) and manganese (MAX 1.0 ppm down to 0.01 ppm). It lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process. The filter pack also removes sediment, chlorine, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. It is tested by an independent third-party to meet NSF/ANSI standards. The filter has a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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. For well/pond water with very high iron / manganese please contact us for customized solutions.
  • $189.99
    iSpring F4WGB22BPB 4.5” x 20” Whole House Water Filter Replacement Set - Two Carbon Block Cartridges and Two Lead Reducing Cartridges - Fits WGB22B-PB - Pack of 2 Sets (F4WGB22BPB)
  • [Protect Your Family and Household Appliance from Lead and More] Our filter (FCRC25B) is specially designed for reducing lead. This filter features a high capacity of 15,000 ppm for lead, effectively reducing lead to below 15 ppb (the EPA standard for drinking water). Together with the carbon block filter, the filter pack also removes sediment, chlorine, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. Our 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage CTO Carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. It is tested by an independent third-party to meet NSF/ANSI standards. The filter has a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [Peace of Mind Customer Service] Register online to activate your manufacturer warranty and life-time free tech support. 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.
  • $299.99
    iSpring F6WGB32B 4.5” x 20” Whole House Water Filter Replacement Set - Two Sediment Cartridges and Four Carbon Block Cartridges - Fits WGB32B - Reduces up to 99% Chlorine - Pack of 2 Sets (F6WGB32B)
  • [Protect Your Family and Household Appliance from Sediment, Chlorine, and More] Say goodbye to smelly, bad tasting water! Our filters are specially designed to remove up to 99% of chlorine from water as well as sediment, rust, herbicides, industrial solvents, and various other contaminants.
  • [DIY Installation and Maintenance] Refer to our manual and our helpful YouTube videos for easy DIY installation. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance. Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • [Top-Notch Quality] The first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 microns. The second and third stage CTO Carbon Block filters are made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both are tested by an independent third-party to meet NSF/ANSI standards. Both filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year.
  • [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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $199.99
    iSpring FC15B 5-Micron Universal Premium Coconut Shell High Capacity Activated CTO Carbon Block Water Filter Replacement Cartridge for Whole House Water Filtration Systems, 4.5" x 10" (FC15B)

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

    [Exceptional Filtration Performance] 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. Steady flow and high absorption.

    [Long Filter Life] 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 optimal performance, depending on the quality of source water and daily water consumption.

    [Great Compatibility] Fits standard 10"x4.5" big blue whole house water filtration systems. Official 2nd stage Carbon Block replacement filter cartridge for iSpring whole house water filtration system WGB21B and 1st stage replacement filter cartridge for WGB21BM and WGB21B-PB. Individually sealed for freshness.

    [Peace-of-mind Customer Support] Your risk-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 FC25 High Capacity 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.
  • Top-Notch Quality: Our FC25 CTO Carbon Block filters are made of high-quality coconut shell carbon for maximum filtration efficiency and 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. The 20” x 2.5” filter cartridges have a minimum impact on water flow (up to 12 GPM) and require minimum maintenance.
  • 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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • Out of Stock
    $32.09
    iSpring FC25B High Capacity 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 various natural organic compounds, taste and odor compounds, and synthetic organic chemicals.
  • Standard Size: Our filter set fits standard 20” x 4.5” housings, including brand name models.
  • Top-Notch Quality: Our FC25B CTO Carbon Block filters are made of high-quality coconut shell activated carbon for maximum filtration efficiency and filter life. Activated carbon is an effective adsorbent because it is a highly 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. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance.
  • 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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $51.99
    iSpring FC25BX2 High Capacity 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.
  • Top-Notch Quality: Our FC25B CTO Carbon Block filters are made of high-quality coconut shell activated carbon for maximum filtration efficiency and filter life. Activated carbon is an effective adsorbent because it is a highly 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. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance.
  • 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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $75.99
    iSpring FCRC15B Lead Reducing Replacement Water Filter, Ultra High Capacity, 10"x4.5" (FCRC15B)
  • [Protect Your Family and Household Appliance from Lead] Our filter (FCRC15B) is specially designed for reducing lead. It features a high capacity of 80, 000 gallons of water, effectively reducing lead level from 100 ppb to 15 ppb (the EPA standard for drinking water) and less.
  • [Great Compatibility] Being a perfect 2nd stage filter for iSpring WGB21B-PB, FCRC15B also fits standard 10” x 4.5” housings from most brand name models.
  • [Easy to Maintain] The cartridge lasts up to 3 times longer than conventional media. It also has a minimum impact on water flow (up to 15 GPM) and requires minimum maintenance.
  • [Top-Notch Customer Service] Backed by a 30-day money-back guarantee and extended manufacturer warranty upon warranty registration at iSpring. Lifetime tech support(678-261-7611) from Alpharetta, GA USA.
  • [TDS Note] Unlike an RO system, this system will NOT reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, please consider our iSpring RO systems.
  • $85.99
    iSpring FCRC25B Lead Reducing Replacement Water Filter, Ultra High Capacity 4.5" X 20" Big Blue, white (FCRC25B)
  • Protect Your Family and Household Appliance from Lead: Our filter (FCRC25B) is specially designed for reducing lead. This filter features a high capacity of 15, 000 ppm for lead, effectively 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.
  • Easy to Maintain: The cartridge lasts up to 3 times longer than conventional media. It also has a minimum impact on water flow (up to 15 GPM) and requires minimum maintenance.
  • 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), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.
  • $149.99
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