Usually used as the second stage for 20 in. Big Blue whole house filters. The carbon block filter is manufactured using a continuous extrusion process. It consists of a high quality virgin premium performance Activated Carbo...

Buy Now From Amazon

Usually used as the second stage for 20 in. Big Blue whole house filters. The carbon block filter is manufactured using a continuous extrusion process. It consists of a high quality virgin premium performance Activated Carbon. It is effective in reducing free chlorine, bad taste, odor THM, Organics, hazardous chemicals, and pesticides. Depending on the inlet water quality or flow rate, it needs to be replaced every 6 months or 100,000 Gal. of water.

  • Individually wrapped for freshness
  • Lower pressure drop, no release of carbon fines, great physical strength, highly porous, high adsorption, steady flow, highly uniform, and solid structure integrity
  • Length: 20 in., O.D. = 4.5 in., I.D.= 1 in.
  • 1/4 in. fitting


    • Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block water filter is specially designed to remove up to 99% of chlorine from water as well as taste and odor compounds, cloudiness, and chemicals.
    • Standard Size: Our FC25B whole house water filter fits standard housings that requires 20” x 4.5” water filter cartridges, including brand name models. The 20” x 4. 5” water filter cartridge has a minimum impact on water flow (up to 15 GPM) and require minimum maintenance
    • 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. This whole house water filter is tested by an independent third-party to meet NSF/ANSI standards.
    • 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 water filters please reach out to us immediately. We are happy to help!
    • Please Note: The water filter 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.
    • Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block water filter is specially designed to remove up to 99% of chlorine from water as well as taste and odor compounds, cloudiness, and chemicals.
    • Standard Size: Our FC25B whole house water filter fits standard housings that requires 20” x 4.5” water filter cartridges, including brand name models. The 20” x 4. 5” water filter cartridge has a minimum impact on water flow (up to 15 GPM) and require minimum maintenance
    • 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. This whole house water filter is tested by an independent third-party to meet NSF/ANSI standards.
    • 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 water filters please reach out to us immediately. We are happy to help!
    • Please Note: The water filter 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.

    Similar Products

    iSpring FP25B 20iSpring FM25B Iron Manganese Reducing Big Blue High Capacity Replacement Water Filter 4.5iSpring FP25BX2 Water Filters 20 x 4.5iSpring FCRC25B Lead and Iron Reducing Replacement Water Filter, Ultra High Capacity 4.5iSpring FP25BX4 20iSpring WSP-50 WSP-50-Reusable Spin Down Sediment Water Filter-50 Micron, 20 GPM, 1iSpring O-Ring for Big Blue Water Filter Housing Pack of 2#ORBx2, Black 2 PieceiSpring WKB32B WGB32B 3-Stage Whole House Water Filtration System w/ 20-Inch Big Blue Sediment and Carbon Block Filters