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Pentek FloPlus-20BB Filter - 20" Big Blue Carbon

Retail: $109.95
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FiltersFast FF20CBB-.5 Replacement for Pentek FLOPLUS-20BB

Retail: $64.99
You Save: 43%
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0.5 Micron
Micron Rating
0.5 Micron
Carbon Block
Media Type
Coconut Carbon Block
NSF 42 Certified
NSF 53 Certified
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Product Information
Pentek FloPlus-20BB
FiltersFast FF20CBB-.5

This Pentek FloPlus-20BB Filter is a 20 inch Big Blue carbon block water filter for use in many water filter systems, especially whole house filter systems. The Pentek 455906-43 is a Big Blue filter (4 1/2" diameter) that features a much higher flow rate in gallons per minute than standard diameter filters (2 1/2" ). The Pentek FloPlus-20BB is specially made for high flow whole house applications where a low pressure drop is needed.

This advanced Pentek filter replacement cartridge is specifically made to reduce the bad taste and odor of chlorine and other chemicals in water. It also removes or reduces sediment, dirt, rust, and other common impurities. This filter also removes 99.95% of cysts such as cryptosporidium and giardia.

Pentek FloPlus-20BB Filter Replacement Specifications:

  • Connection: Drop in
  • Replaces WFP-20BBa
  • Micron Rating: 0.5 micron
  • Temp. Range: 40 - 180° F
  • Filter Media: Carbon block
  • Initial Pressure Drop: 4 PSID
  • Dimensions: 20" length x 4 1/2" diameter
  • Gallons Per Minute: About 4-5 GPM flow rate depending on specific filter system
  • Filter Life: About 6 months or 50,000 gallons depending on usage and water quality
  • NOTE: this cartridge should be flushed for about five minutes before using the water in order to remove all carbon fines

Compatible Part or Model Numbers
Pentek 455906-43
American Plumber WFP-20BBA, WFP-20BB, 555017-51
Pentek 455906-43
Compatible Systems & Housings:
Pentek FPS-20BB
American Plumber WFP1.5-20BBA FloPlus System (Part number: 152087)
Pentek 20" Big Blue filter housings (#20 Big Blue)
Most brands' 20" x 4.5" housings

This Pentek FloPlus-20BB water filter is also known by Pentek part number 455906-43. This filter has been tested and certified by NSF International to NSF / ANSI Standard 53 for the reduction of cysts.

prop 65 California Residents: Prop 65 Warning


Customer Reviews:

Total Reviews: 1 | Average Rating: 5 / 5.0

This filter on a water well system in Texas with hard water just works as defined extremely well. The pressure loss was only two pounds (PSI). Also, the Tech. at FilterFast explained that a UV light may not be necessary and after water tests, she was correct. This makes my third one, changed every six months. Highly recommend.

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