Save with Auto-Ship

Get the product you need, exactly when you need it, delivered right to your door. No more searching for the right part number, we've got you covered. Plus, you'll save $$ on every order and shipping is on us. Learn more

Save Money

Free Shipping*

Choose Frequency

*Free Shipping available in the contiguous US

CBC-20BB Pentek Replacement Filter Cartridge by Tier1

Price $80.99 List Price Price $115.99 Save 30%
Availability: In Stock - Free Shipping
Fits filtration system housings that accepts 20 x 4.5 inch cartridges
Choose a quantity
  • 1Filter$80.99 
  • 2Filters Price $78.56 each
  • 3Filters Price $76.20 each
  • Ships fast!
  • Reduces sediment as small as 0.5 micron from your water
  • For best results, replace every 3 - 6 months, based on your water quality
› See more product details
  • Ships fast!
  • Reduces sediment as small as 0.5 micron from your water
  • For best results, replace every 3 - 6 months, based on your water quality
A replacement cartridge for systems that accept 20 x 4.5 filters, the CBC-20BB-WF Tier1 water filter cartridge helps you maintain quality water in your home by capturing particles as small as 0.5 micron. For three to six months after installation, based on your existing water quality, this cartridge will help to ensure you serve great water while protecting your appliances from the risk of sediment corrosion. Order the CBC-20BB-WF Tier1 water filter cartridge your system needs 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 Brands3M, Aqua-Pure, Culligan, Pentek, Tier1
Manufacturer's IdCBC-20BB
Advertised Size (in)20 x 4-1/2
Actual Size (in)19 3/4 inches (length) x 4 1/2 inches (outside diameter)
Actual Size (cm) 50.165 x 11.43
Outside Diameter (inches)4.5
Primary Filter MediaActivated Carbon Block
Filter Life (gallons)100,000
Filter Life (months)6 months
Micron Rating (Nominal)0⋅5
Operating Temperature (°F)40 - 180
Operating Temperature (°C)4.4 - 82.2
Flow Rate (gpm)2
Flow Rate (lpm)7.57
Warranty GuaranteeUnconditional Product Guarantee for Life of the Product
IncludesOne 20 X 4.5 inch Carbon Block Replacement Filter by Tier1
Primary Filter MediaCarbon Block

Reduced Contaminants

The TIER1-CBC-20BB reduces the following contaminants:

  • Bad Taste and Odor
  • Chlorine Taste & Odor
  • Cysts
  • Dirt
  • Sand
  • Sediment
  • Silt

The TIER1-CBC-20BB is comparable with the following part numbers

33004002 155312-43 CBC-20BB


  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