Filters Fast Logo Header
Free Shipping on orders over $75 | FREE 365-DAY RETURNS

Product Availability

Please provide your e-mail address below to receive a notification when this product becomes available:


Thanks! We'll send you a notification when this product is available!

Compare & Save

Pentek CFB-Plus20BB 20" Big Blue 5 Micron Filter

Retail: $79.99
You Save: 21%
Buy 1 - 5 for $62.95 ea.
Buy 6+ for $58.95 ea.
Sorry, this is no longer available. guarantee

FiltersFast FF20CBB-5 Replacement for Pentek CFB-PLUS-20BB

Retail: $52.99
You Save: 28%
Out Of Stock
Notify me when this is available! guarantee
Compare & SaveUse the table below to compare
5 Microns
Micron Rating
5 Microns
Carbon Block
Media Type
Coconut Carbon Block
NSF 42 Certified
NSF 53 Certified
Sign up for the Home Filter Club during checkout.
You choose how often you want your filter, and we take care of the rest.
Are you a purchasing agent? Purchasing for a business?
Contact [email protected] to gain access to case quantity discounts, account management and terms!
Product Information
Pentek CFB-Plus20BB
FiltersFast FF20CBB-5

The Pentek CFB-Plus20BB Water Filter Cartridge is a 20-inch Big Blue carbon block water filter replacement for use in many water filter systems, especially whole house filter systems. It is an enhanced version of the basic Pentek CFB-20BB filter that offers even more chlorine and sediment reduction. The Pentek CFBPlus20BB is a large diameter Big Blue filter (4 1/2") which features a higher flow rate and reduces or removes more chlorine and sediment than standard diameter (2 1/2") water filter cartridges. It also has a longer filter life compared to other similarly sized filter cartridges.

This Pentek filter replacement cartridge uses advanced Fibredyne carbon block technology for up to two times the chlorine taste and odor reduction and dirt holding capacity of standard carbon block filters. It removes or reduces sediment, dirt, sand, rust, and other impurities.

Pentek CFB-Plus20BB Filter Specifications:

  • Part Number: CFB-Plus20BB (255678-43)
  • Weight: 3 pounds
  • Connection: Drop in
  • Temp. Range: 40 - 180°F
  • Micron Rating: 5 nominal
  • Filter Media: Carbon block
  • Cap Material: Polypropylene
  • Gaskets: Santoprene
  • Inner/Outer Wraps: Polypropylene
  • Netting: Polyethylene
  • Initial Pressure Drop: 2.5 PSI @ 4GPM
  • Exact Dimensions: 20" length x 4 5/8" diameter
  • Reduces: Chlorine, sediment, dirt, rust, sand, and more
  • Gallons Per Minute: About 4 GPM flow rate depending on specific filter system
  • Filter Life: About 12 months or 50,000 gallons depending on usage and water quality
  • NOTE: This cartridge should be flushed for a few minutes prior to first use in order to remove excess carbon fines

Pentek CFB-Plus Series water filter cartridges are manufactured entirely from FDA approved materials and can be used for numerous in-home, undersink, commercial, food service, and light industrial uses.

This Pentek CFBPlus-20BB filter is also known by Pentek part number 255678-43 / 25567843.

prop 65 California Residents: Prop 65 Warning