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OmniFilter CB3 Undersink Carbon Filter (Series B)


OmniFilter CB3 Undersink Carbon Filter (Series B)
You Save: 22%

in stock
Ships by Tomorrow 3/30/2015

Note: As of August 2014, the diameter of the CB3 has been changed from 2.72" (Series A) to 2.87" (Series B). The larger diameter CB3 (Series B) may not fit some older Omnifilter housings. Omni recommends housings over 10 years old should be replaced for general safety and performance reasons. If your current housing is not compatible with the new CB3 (Series B), we recommend purchasing a OmniFilter CBF3 Undersink Filter System (Series B).

The current CB3 (Series B) is NOT compatible with the following housings:

  • OB3
  • SFM2, SFM2 Series A
  • CBF1
  • CBF3, CBF3 Series A
  • CBF20
  • OT32 Series A
  • OT2/U600
  • UC2/U500-OmniDeluxe
  • OT5/U700
  • SMF-5/U400 OmiSuper
  • RO2000/RO2000TDS

The alternative OmniFilter GAC1 Undersink Carbon Water Filter is a correct size filter compatible with the previously listed models. NOTE: The GAC1 has a micron rating of 20 compared to the CB3 micron rating of .5.

The OmniFilter CB3 Undersink Carbon Filter (Series B) boasts being one of the most effective carbon block cartridges available to consumers today. This under sink filter removes chlorine and odors, harmful bacteria like Giardia and Cryptosporidium, lead, and volatile organic compounds like Atrazine (a herbicide) and Lindane (a pesticide), as well as 32 other contaminant, to give you great tasting, safe drinking water right from the tap or dedicated faucet. This is the correct replacement filter for the following filtration systems only:

  • USM2
  • CBF1 Series A
  • CBF1 Series A
  • CBF3 Series B
  • OT32 Series B, OT32 Series E
  • RO2000 Series B
  • RO2050

This filter will also fit Ametek, Teledyne, Ace, Master Plumber, Flotec, Honeywell, GE, American Plumber and most standard size under sink water filters and Whirlpool WHCF-DB2. The CB3 also fits the Nutrition For Life Nutri-Flow HL-250 and the HL-300.

Note: The OmniFilter CB3 is NOT for sale in California.

This filter meets NSF / ANSI standard 42 for the reduction of:

  • 97.5% of Chlorine
  • Particulates Class I

This OmniFilter CB3 Undersink Carbon Block Water Filter meets NSF / ANSI standard 53 for the reduction of:

  • 98.60% of Lead
  • 99.99% of Cysts
  • 99.60% of Volitale Organic Chemicals (VOCs)
  • 99.19% of Asbestos
  • Chloramine Taste and Odor
  • Mercury
  • Lindane
  • Atrazine
  • MTBE


  • Micron Rating: 0.5
  • Dimensions: 2 5/8" x 9 3/4"
  • Flow Rate: 0.5 Gallons per minute
  • Filter Life: 400 Gallons or 6 months
  • Genuine OEM Part.


OmniFilter CB3 Undersink Carbon Filter (Series B) Product Reviews :

Average rating :
Number of reviews : 4
Write a review
  •   Ideal Replacement for Nutri-Flow units
    Bruce - Henderson/Las Vegas, NV  

    Original filters for the NutriFlow systems cost $75, but NFLI went out of business. I ordered two of the CB3's, and was blown-away by the quality of the water! If you still have any Nutrition For Life HL-250 or HL-300 filtration units, you can now replace the old blue KDF filters for half the original cost of replacement when NFLI was in their heyday, and get the most-amazing water quality that would've made both Bertram and Mitcham green with envy!! THANK YOU!

  •   CB3 Filter Life
    Bryan - Detroit, MI  

    Stenn from Baltimore is right when he says to not wait for the flow rate to decrease before changing the filter, but you shouldn't use the same filter for 3 years! Carbon block filters remove chlorine taste and odor far longer than they remove lead, chemicals, MTBE, and other nasty contaminants. After several years, the filter may still be removing 95% of the chlorine, but little or none of the other contaminants, most of which you can't taste or smell.

    Also, after 6 months, no matter how many gallons have gone through the filter, 'bacteria farming' starts to occur. Before 6 months, the cartridge looks relatively clean, but after 6 months, pink stuff starts to grow on it. So, carbon block filters should be changed every 6 months or sooner, period.

    By the way, I've never used this particular filter cartridge, but based on the performance data, it's one of the best carbon blocks on the market.

  •   CB3 H2O Filter
    Daryl - SW Arkansas  

    The filters received are original Omni filters. Delivery was excellent and the filters were the best price found anywhere.

  •   Excellent, and lasts
    Stenn - DC/Baltimore area  

    I've used these for years, and wouldn't consider being without it, after moving up from the 1-micron powdered carbon filter (which was fine too) when I found these carbon-blocks on sale for $27!!..I bought 3 of them. But you can't listen to the '3-6 months' estimate, and on city water don't wait for the flow to slow down as the sign you need to change it, I've been using the same one for almost 3 years, and the taste is just now starting to change, telling it needs to be changed, but flow is still full-strength. So even at $36 it's well worth it, considering how long they last. The difference making coffee with and without carbon filtering is like gourmet and military coffee! :)

  • CB3 is used in the following Models
     OmniFilter U600
     OmniFilter OT32
     OmniFilter Total 2
     OmniFilter Total Plus
     OmniFilter U500
     OmniFilter CBF3
     OmniFilter OB3
     OmniFilter Omni Deluxe
     OmniFilter OT2

    OmniFilter CB3 Undersink Carbon Filter (Series B) More Information:

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