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Comment: Item will come repackaged. Minor cosmetic imperfection on top, front or sides of item (affecting less than 1% surface area). Minor cosmetic imperfection on bottom or back of item (affecting less than 1% surface area).
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  • Omni CB3 Carbon Block Undersink Replacement Water Filter Cartridge
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Omni CB3 Carbon Block Undersink Replacement Water Filter Cartridge

by Omni

List Price: $41.94
Price: $38.96 & FREE Shipping. Details
You Save: $2.98 (7%)
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Ships from and sold by Amazon.com. Gift-wrap available.

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2 offers from $125.00
  • 6 months or 400 gallons
  • Reduces lead, cryptosporidium and giardia cysts
  • Removes Mercury
  • Reduces odor,chlorine,rust and sediment
  • This filter will not fit any Omni canisters built over 11 years ago. The factory recommends that any canister over 10 years old be changed in general for safety and performance reasons. Model no OT32, USM2, and the OB1 are ones this filter does fit.
See more product details
12 new from $34.99 6 used from $19.99

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$38.96 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Omni CB3 Carbon Block Undersink Replacement Water Filter Cartridge + Omnifilter RS2-SS24-05 Fine Sediment Filtration Cartridge + Omni Corporation CB1 Carbon Block Undersink Replacement Cartridge
Price for all three: $68.47

Buy the selected items together

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  • Buy Used and Save: Buy a Used "Omni CB3 Carbon Block Undersink Replacement Water ...” from Amazon Warehouse Deals and save 26% off the $41.94 list price. Product is eligible for Amazon's 30-day returns policy and Prime or FREE Shipping. See all Used offers from Amazon Warehouse Deals.

Product Description

Product Description

FLOTEC WATER FILTER NSF certified Reduces cryptosporidium and giardia cysts Improves taste, reduces odor and chlorine Reduces rust and sediment 0.5 micron rating

From the Manufacturer

Omni CB3-SS6-05 Carbon Block Undersink Replacement Water Filter Cartridge removes sediment/rust particles, taste/order, lead, chlorine, cryptosporidium and Giardia Cysts, VOC's, Mercury and Asbestos. This will give you bottled water quality for pennies!

Product Information

Technical Details
Part Number CB3-R
Item Weight1 pounds
Product Dimensions2.8 x 2.8 x 9.8 inches
Item model numberCB3-SS
Item Package Quantity1
Warranty Description1 Year
  
Additional Information
ASINB0002YU70M
Best Sellers Rank #22,214 in Home Improvement (See top 100)
Shipping Weight1.1 pounds (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableJuly 13, 2004
  
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Customer Questions & Answers

Customer Reviews

Great tasting water from the tap.
R. Savage
I have a old Omni twin under sink filter system, I have had problems with other brands cartages not fitting correctly,These fit as expected & work well.
Mark J
The filter has thicker o-rings (the rubber seals on either end) and doesn't fit my pre-2008 system.
mail order girl

Most Helpful Customer Reviews

26 of 31 people found the following review helpful By BW on January 6, 2009
Verified Purchase
I purchased this cartridge to replace the original cartridge in my Omni CBF3 undersink filter unit. The new filter assembly is 0.0125" taller than the original assembly. The new filter uses thicker gaskets on the top and bottom surfaces. The taller filter will not allow the top and bottom halves of the canister to screw together sufficiently to compress the filter unit sealing o-ring.

As a result the canister now leaks.

Several emails to Omnifilter prompted a half-hearted response from a lady named Linda. The conversation follows:

Me: Explanation of the problem...

Linda: Please remove the gasket on the cartridge and re-insert the cartridge. This should stop the leaking.

Me: If I remove the gaskets there will be no sealing surface to force the water through the filter. The water will bypass the filter.

Linda: The water will still go through the filter without the gasket.

Me: Are you indicating that, without the use of the gaskets, the filter will make a WATERTIGHT seal with the upper and lower halves of the filter housing?

Linda: Yes.

The less-than-enthusiastic response led me to keep the old, thinner washers in the unit. So far, no leaks.

P.S. If my research is correct, this filter removes particles larger than 0.5 micron, whereas Brita filter pitchers only remove particles larger than 30 micron...60 times larger. My old socks filter water better than a Brita pitcher.

***************
Edit 02/03/2015
***************

Edited title to clarify that the fit issue is with the new washers. Save the old washers or purchase Grainger part number 4PAG9.
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5 of 5 people found the following review helpful By Ghost on August 7, 2014
If you have the old style Omni OB1 housings, the ones with the blue vent button on the inlet side then this filter will not fit. My filter housings are probably 15 years old. This is not a seal problem. The old housings are more narrow and the filter is too wide to reach the bottom of the housing. I would say it makes it 2/3rds of the way down and that's it. I'm sure it's a good filter, it's just too big for the old housings.
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3 of 3 people found the following review helpful By mail order girl on October 19, 2013
Verified Purchase
The filter has thicker o-rings (the rubber seals on either end) and doesn't fit my pre-2008 system. Having seen another review, I knew what to expect, but ordered it anyhow because there aren't any other choices. I salvaged the o-rings off of the old filter, trimming the outside edge to make it fit side to side. It is working. See the previous review titled "Filter Does Not Fit" and all comments for more info.

Update: The filter has been working well with the modification, and since it seems to be the only one available for my system, I am now satisfied. Updating from 2 to three stars because it really should fit without all this hassle, right?
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7 of 10 people found the following review helpful By Dewey R. Myers on December 12, 2007
Verified Purchase
The Omni CB3 is an under sink filter replacement cartridge. I use it as the second stage of a dual filter system, a generic carbon filter is used in stage one. My experience over several years of use with this setup has been outstanding. I rely on surface water coarse filtered through a swimming pool sand filter as my only source of water. From a cistern it is pumped to a whole house system. A bar tap faucet at the kitchen sink is connected to the under sink filters and provides all my drinking water. The CB3 provides safe drinking water for 4 to 5 months. The flow rate drops as the filter reaches capacity. The CB3 takes out volatile chemicals, lead, chlorine, sediment, and its 0.5 micron rating traps cysts from animal waste. My wife tells me daily that we have the best drinking water she has ever tasted. I agree. I highly recommend this filter for safe and tasty water.
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1 of 1 people found the following review helpful By L. Russo on February 8, 2013
Verified Purchase
The filters I received do not look like the one pictured in the description (and not the cb3 that I need to use in my water filter).

The original cb3 has only one opening to the inside cylindrical channel and the filter I received is open on both ends. As a result not all the water will not be forced through the filter as is necessary.
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1 of 1 people found the following review helpful By Robert O Erickson on February 20, 2014
Verified Purchase
Filter was all right. I paid almost twice the price of the "0" rings as the price they cost, Plus paid shipping on filter? will go to Lowe's or home Depot next time. Not a good value with shipping.
Lesson Learned Bob Erickson
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3 of 4 people found the following review helpful By Derrick on July 31, 2008
Got the hard to find Kenmore 34451 from ebay and put this filter in it.. cheap setup that delivers great tasting drinking water that is on par or exceeds reverse osmosis units, the best I've ever tasted aside from water from natural springs.
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1 of 1 people found the following review helpful By greg70ny on December 3, 2012
Verified Purchase
This is an older model with lower flow rate. You want the Series B. The description of this should be more accurate or at least state it's a Series A. Overall though, it still fits and works.
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Omni CB3 Carbon Block Undersink Replacement Water Filter Cartridge
This item: Omni CB3 Carbon Block Undersink Replacement Water Filter Cartridge
Price: $41.94 $38.96
Ships from and sold by Amazon.com

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