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Pentek® GAC Series 20" × 4½", 20 Micron Cartridge

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  In Stock
  •   Model # GAC20-BB
  •   Part # 155249-43
  •   UPC 051678249437
  •   Brand Pentek
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Filtered Water Benefits the Whole Family
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GAC Series cartridges effectively reduce unwanted tastes, odor and chlorine taste & odor from your drinking water.* They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption.

The construction of the cartridge allows water to enter at one end and pass through the entire length of the carbon bed before exiting the other end of the cartridge, while an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20-micron post filter helps reduce carbon fines and other suspended particles from the filtered water. The post-filter is permanently fastened to an innovative support basket ensuring that it is firmly secured and eliminating any potential for bypass.

GAC Series cartridges are available in a variety of sizes and flow rates, and effectively provide good general-purpose drinking water filtration.


  • Effective bad taste & odor and chlorine taste & odor reduction*
  • Designed for maximum adsorption
  • Post-filter to reduce carbon fines
  • Available in a variety of sizes and flow rates
Compare to Pentek® EP-20BB
Compare to GAC-20-BB-W
Model Maximum Dimensions Initial ΔP @ Flow* Chlorine Capacity @ Flow*
GAC-10 9-1/4" × 2-7/8" 7.0 psid @ 1.0 GPM >5,000 gal @ 1.0 GPM
GAC-20 20" × 2-7/8" 16.0 psid @ 2.0 GPM >10,000 gal @ 2.0 GPM
GAC-BB 9-1/4" × 4-1/2" 6.0 psid @ 2.0 GPM >12,500 gal @ 2.0 GPM
GAC-20BB 20" × 4-1/2" 5.0 psid @ 5.0 GPM >25,000 gal @ 4.0 GPM

* Based on manufacturer's internal testing.