CTO Carbon Block - 5 Micron

Grouped product items
10" - 5 Micron MATRIKX CTO Carbon Block

SKU: 200056

In stock


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20" - 5 Micron MATRIKX CTO Carbon Block

SKU: 200153

In stock


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Kx Technologies MATRIKX brand carbon blocks are the most trusted and widely used carbon blocks in the world. The 10” size is the industry standard and will fit our systems, as well as virtually every brand of RO system that use similar looking carbon blocks and the 20" size works in our legacy BRS Spartan unit along with other 20" RO systems.

Most common filter arrangements

  • If your system utilizes one carbon block we recommend installing the 5 Micron CTO in the second stage after your sediment filter.*
  • If your system utilizes two carbon blocks, we recommend installing the 5 micron CTO in the second stage after your sediment filter and the 1 micron CTO Plus in the third stage.

Available in 10" and 20"

*You may use a 1 micron CTO PLUS in a single block arrangement, however, depending on pre-filtration and sediment content of your home's water, it may clog faster than you would like.


Matrikx CTO Data Sheet


Matrikx CTO 5 Micron Carbon Block

  • Most widely used carbon block in the world
  • NSF Certified and WQA Gold Seal Certified
  • Manufactured using FDA-compliant materials
  • Optimized for chlorine and organic chemical treatment
  • 5 Micron rated filter – Nominal*
  • 10 Micron – Absolute**
  • Rated for 6,000 of water @ 1/GPM***

*Nominal rating will remove >85% of particulate of given size from water with single pass filtration

**Absolute rating will remove >99.9% of particulate given size from water with single pass filtration

*** This is a total of all water processed and includes product water as well as waste water. If you find you are not getting the full life out of the carbon block it is likely due to a large volume of sediment in your homes water supply.  Please try our ROSAVE.Z premium line of sediment filters for optimal performance.

More Information
Filter Dimensions 10 in. x 2.5 in. (Standard)
Carbon Block Type Chlorine
Micron Rating 1, 5
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Product Questions

How does this carbon block compare to Pentek CBC-10? Have any technical comparisons been made?
Question by: Drew Young on Jan 23, 2023, 6:56 AM
Answer by: James Johnson (BRS Staff) on Feb 9, 2023, 10:30 PM
Are these 4.5 or 2.5 " ?
Question by: John on Nov 27, 2016, 7:46 AM
These are 2.5" :-)
Answer by: Randy on Nov 27, 2016, 8:53 AM
How often, on average, do both of these filters need to be replaced?
Question by: laine lawless on Jun 10, 2016, 6:56 PM
Great question!
Typically the filters will last between 6-9 months however the time may vary depending on water quality. to test, you can use a standard chlorine test strip to ensure chlorine is not getting through. Feel free to let us know if you have any further questions!
Answer by: Connor on Jun 14, 2016, 4:02 PM