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PUREPLUS 20 X 4.5 inch Big Blue CTO Solid Carbon Filter Water

(4 customer reviews)


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  1. PUREPLUS CTO20BB filter can reduce up to 99% of residual Chlorine, sand, rust, sediment, taste, and color. Recommended for tap water filtration.
  2.  Made of 100% coconut shell activated carbon block to filter most sediments. Innovative sintering technology ensures high absorbing capacity and offers a much finer filtration of suspended particles and dirt.
  3.  Each filter is produced under the ISO9001 standard and inspected under strict quality control. Each filter is produced through 34 production processes, 400PSI pressure tests, 10,000 water hammer tests, and 6 independent tests.
  4. Able to filter up to 30000 gallons depending on water quality. Suggest replacing it every 3-6 months for the average household for optimal performance depending on daily water consumption.
  5.  This filter can be used in any standard 20x 4.5 inch heavy duty filter housings and is compatible with models of ClearChoice 84642, 84641, Pelican CB-20, Pentek 155783-43, EPM-20, CBC-20, Trojan CB-20, iSpring FC25B, Hydronix CB-45-2005, CB-45-2010, Watts WCBCFF20, etc.

Efficient Filtration & Safe Materials

High Grade Carbon Block: Chlorine reduction rate >99%
Recognized by Australia Water Mark: food grade material
NSF/ANSI 42 certification information: Certificate W-11150, by IAPMO, 2021.
High Grade Carbon Block: Chlorine reduction rate >99%
Recognized by Australia Water Mark: food grade material

Strict Quality Control

  • Filter Life: Replace every 3-6 months or 30000 gallons depending on water quality.
  • Micron Rating: 5 Micron
  • Flow Rate: 2.5-5GPM
  • Length: 20 inch
  • Diameter: 4.5 inch
  • Operating Temperature: 4-52℃/39-126℉ Max.
  • Operating Pressure: 100psi
  • Using working pressure: 60psi

    4 reviews for PUREPLUS 20 X 4.5 inch Big Blue CTO Solid Carbon Filter Water

    Based on 4 reviews
    5 star
    4 star
    3 star
    2 star
    1 star
    1. @RickNakama

      Tried these charcoal versions out because they are priced less than the regular OEM filter. It’s working as expected and if anything changes during use, I will update it. The only thing I foresee is I won’t be able to see how dirty and brown the filter is when I go back to change it the next time like the way the white ones show.

    2. Renee Jones

      I have two filters in parallel feeding the house. I’ve been using filters for about 25 years or so and these seem to be the best quality filters so far. I used to buy mine at either of the two big box stores and they were never this “dense” and substantial. The flow through them appears to be great and I use them mainly for sediment/calcium removal along with removal of a rust particulate and they seem to work great.

    3. afaGV

      Update: I’m adding 2 stars for customer service. After I posted my review, PUREPLUS reached out to me. While there was no technical solution, they were concerned and very responsive and did what they could to keep the customer happy. I sent photos so they could see the issue and feedback has been shared with their engineering team. Very responsive customer support.

    4. fabric freak

      Very hard well water. High iron and calcium content. Easy to change them. Some of my neighbors have very expensive water systems. And their water still tastes nasty. I also use a water pitcher with a filter. No heavy bags of salt to carry up and down stairs.

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    PUREPLUS 20 X 4.5 inch Big Blue CTO Solid Carbon Filter Water