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Omnifilter CB3 Comparable Carbon Block Whole House Water Filter by Tier1

$17.99 List Price $25.99 Save 30%
Availability: In Stock
Choose a quantity
  • 1Filter$17.99 
  • 2Filters $17.45 each
  • 3Filters $16.93 each
  • Reduces contaminates such as bad taste and odor as well as sediment
  • Convenient and cost effective
  • Has the ability to reduce particles down to 0.5 microns in size
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The Omnifilter CB3 Comparable Carbon Block Whole House Water Filter by Tier1, is easy to install, simply place in your water filter housing (Omnifilter U30) and you're ready for great tasting water. If you have both sediment and bad taste and odor, the TIER1-US-D30 will take care of both. Rated at 0.5 microns, very small particles will be reduced ensuring the best in water quality. Order your TIER1-US-D30 today!

Experience the Tier1 Difference

Tier1 manufactures high-quality filtration and household products. We take creating and maintaining a healthy home seriously. Products must undergo rigorous testing and meet demanding quality expectations in order to earn the Tier1 badge. Every purchase is backed by the Tier1® Guarantee:

  • Guaranteed Fit
  • Guaranteed Quality
  • Guaranteed Price
Package Qty1
Used In BrandsCulligan, GE, Pentek, ReplacementBrand, Tier1
Manufacturer's IdUS-D30
Advertised Size (in)10 x 2-1/2
Actual Size (in)9 3/4 inches (length) x 2-5/8 inches (diameter)
MediaRadial Flow Activated Carbon Block
Filter Life (gallons)600
Filter Life (liters)2,271.25
Filter Life (months)6 months
Micron Rating (Nominal)0.5
Flow Rate (gpm)1
Warranty GuaranteeUnconditional Guarantee for Life of the Product

Reduced Contaminants

The TIER1-US-D30 reduces the following contaminants:

  • Chlorine Taste & Odor
  • Sand
  • Sediment
  • Silt
  • Soil

The TIER1-US-D30 is comparable with the following part numbers


The TIER1-US-D30 fits the following model numbers



  1. Turn off water supply. Press red pressure-relief button (if present)
  2. Unscrew housing. Remove large o-ring, wipe clean and set aside
  3. Discard used filter cartridge. Wash housing with dish soap and warm water using a nonabrasive sponge or cloth. Rinse thoroughly
  4. Fill 1/3 with water. Add about 1 tablespoon of bleach and scrub to disinfect. Rinse thoroughly
  5. Lubricate o-ring with clean silicone grease. Change o-ring if any damage cuts or degradation are present. Insert o-ring in groove
  6. NOTE: This step is important to ensure a proper housing seal. Make certain the o-ring is seated level in the groove
  7. Insert new filter cartridge
  8. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge
  9. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation