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The WGB21BM whole house water filter system is a great “point of entry” filtration system and an excellent alternative to the larger WGB22BM (4.5″ x 20″) for smaller homes or where limited space may be a concern. Unlike “point of use” systems, the WGB21BM filters water directly from your source. This means that water from every outlet in your home will have passed through this filter, providing up to 50,000 gallons of clean water for the entire family. The first stage of this whole house water filtration system houses the 5-micron CTO coconut shell carbon block filter (FC15B). Block carbon is more effective than other forms of carbon in that it is finely ground carbon packed into a solidified block. This means it has a higher density than other types of carbon filters and is therefore more effective in removing targeted contaminants. The carbon block filter knocks out bad tastes and odors, removes up to 99% of chlorine from the water, and is highly effective on industrial chemicals. Our second stage (FM15B) iron and manganese reducing filter is specially designed to reduce iron (maximum 3.0 ppm down to 0.01 ppm) and manganese (maximum 1.0 ppm down to 0.01 ppm).


  • Two-stage effective whole house water filter system: Our featured second stage filter (FM15B) is specially designed for iron and manganese removal, reducing iron (maximum 3.0 ppm down to 0.01 ppm) and manganese (maximum 1.0 ppm down to 0.01 ppm). The first-stage CTO filter (FC15B) knocks out cloudiness, bad tastes, and odors, removes up to 99% of chlorine, and is highly effective on industrial solvents
  • 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. These filters have a filtration capacity of up to 50,000 gal. of water, enough to supply a family of four with clean water for up to half a year
  • Easy installation and filter change: This whole house water filter system comes pre-assembled onto the mounting bracket for a streamlined, DIY installation. Filter wrench is included to make routine filter changes quick and easy. A pressure release valve allows for the release of built-up pressure when changing filters
  • Refer to our manual and/or YouTube videos to Install this point-of-entry (POE) whole house water filtration system at the main water supply to get clean and healthy water for the entire family
  • Tech support via call: 678-261-7611 (M-F, 8:30 – 5:30 EST)
  • Tech support via text: 470-560-0012 (M-F, 8:30 – 5:30 EST)
  • TDS note: Unlike an RO system, this whole house water filter 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, consider our iSpring reverse osmosis (RO) systems


  • Brand: iSpring
  • Color/Finish: Iron and Manganese Reducing
  • Chlorine reduction (%): 99
  • Contaminants Filtered: Chlorine, Iron
  • Copper Reduction (%): 0
  • Filtration Method: Carbon Block, KDF, Sediment
  • Includes: Filter, Installation kit
  • Iron Reduction (%): 95
  • Lead reduction (%): 0
  • Maximum feed water pressure (psi): 80
  • Maximum feed water temperature (F): 100
  • Maximum filtered water flow (gallons per min.): 15
  • Minimum feed water pressure (psi): 40
  • Minimum feed water temperature (F): 40
  • Number of filters included: 2
  • Number of Stages: 2 Stage

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