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20 X 4.5 Carbon Block Replacement Filter by Tier1 (0.5 micron)

Price $60.99 List Price Price $86.99 Save 29%
Availability: In Stock
Fits most stand housings built for 20-inch x 4.5 inch filter cartridges
Choose a quantity
  • 1Filter$60.99 
  • 3Filters Price $57.39 each
  • 6Filters Price $54.89 each
  • Easy installation and filter exchanges within minutes
  • Provides fresh, cleaner tasting water throughout your home
  • Reduces impurities and contaminants down to .5 microns in size!
  • Produces better tasting, more refreshing drinking water in every glass
See more product details

Tier1 CBC-20BB Filter Advantages

The Pentek FLOPLUS 20BB comparable whole house carbon block water filter by Tier1 is a 0.5 micron carbon filter that goes to work filtering the water dispersed throughout your home. The Tier1 CBC-20BB-WF water filter uses a carbon block filtering media to reduce contaminants such as sediment, silt, dirt, cysts, and unpleasant chlorine taste and odors. The porous carbon media of the carbon block maximizes the surface area contaminants are exposed to and traps them there to reduce their presence in your drinking water. With polypropylene end caps and rubber washers you can expect a tight bacterial resistant seal between the filter housing and filtration media. Enjoy better tasting water in every glass with your Tier1 CBC-20BB replacement carbon block filter.

Universal Filter Sizing

The 20 X 4.5 carbon block replacement filter by Tier1 is built to fit 20-inch x 4.5-inch filter housings. This standard sizing allows this filter to easily replace existing styles of whole house filters for housings requiring 20 x 4.5 inch filters. The CBC-20BB goes to work immediately providing cleaner, fresher water for up to six months. Enjoy cleaner better water with your whole house replacement filter today.

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
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