Effective Taste & Odor Reduction
The Pentair Pentek GAC-20BB carbon filter uses granular activated carbon (GAC) to effectively reduce chlorine taste, odor, and unpleasant smells, delivering better-tasting, cleaner drinking water for everyday use.

Universal Big Blue Fit (20″ × 4.5″)
Designed to fit all 20″ Pentair Pentek Big Blue housings and other standard 20″ × 4.5″ heavy-duty filter housings. Ideal replacement for any comparable Big Blue carbon cartridge.

Post-Filter for Cleaner Output
Includes a built-in post-filtration layer that helps reduce carbon fines and suspended particles, ensuring clearer water and protecting downstream plumbing and appliances.

NSF Certified Quality
NSF International tested and certified, providing confidence in safety, performance, and material quality.

High Capacity & Long Service Life
Rated for up to 25,000 gallons of water. Recommended replacement every 6 months or sooner if you notice a decline in water pressure or water quality.

Product Specifications:

• Model: Pentair Pentek GAC-20BB

• Filter Type: Granular Activated Carbon (GAC)

• Size: 20″ × 4.5″

• Capacity: 25,000 gallons

• Application: Whole-house or point-of-entry filtration

Ideal For:
Whole-house water filtration, taste and odor reduction, chlorine removal, residential and light commercial water systems.

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