Filters Fast® FF20GAC-20 Replacement for Pentek GAC20-BB
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Filters Fast® FF20GAC-20 Replacement for Pentek GAC20-BB

Retail: $63.99
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Pentek GAC20-BB 20" Big Blue GAC Filter, 155249

Retail: $96.06
You Save: 5%
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25000 Gallons
30000 Gallons
Media Type
Micron Rating
Reduces Sediment
Reduces Bad Taste
Reduces Odor
Reduces Chlorine Taste
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Product Information
Filters Fast FF20GAC-20
Pentek GAC20-BB

The Pentek GAC20-BB fits most whole house filter housings that require a 20 inch filter including the following systems:

  • Cuno
  • 3M Aqua-Pure
  • Omni
  • American Plumber
  • GE
  • Flotec
  • Honeywell
  • Sears 

This double length filter also fits #20 Big Blue housings.

The Pentek GAC20-BB 20" Big Blue Granular Activated Carbon (GAC) Filter Cartridge effectively reduces chlorine taste and odor and bad taste and odor from your drinking water. The GAC-20BB features a 20 micron post filter that captures suspended carbon fines before they exit the filter.

Pentek GAC-20BB, GAC20BB Specifications:

  • Part Number: GAC-20BB
  • Filter Media: Granular Activated Carbon (GAC)
  • 20 Micron Rating
  • Reduces Chlorine, Taste and Odor
  • Dimensions: 4 1/2 inches x 20 inches 
  • Capacity: 25,000 gallons - 6 months
  • Flow Rate: 4 GPM @ 5 psi
  • Temp Range: 40 - 125°F
  • NSF 42 Certified for Material Requirements

prop 65 California Residents: Prop 65 Warning


Customer Reviews

Total Reviews: 3 | Average Rating: 5 / 5.0

Julie B.2022-03-25

Easy online ordering and fast delivery! Will definitely use them again!

Collected by
Marsha Busto2021-06-11

Been using Pentek filters for years and never had any problems at all. Great product!

Collected by

Excellent quality filter! Does the job and less expensive on

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