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Replacement Under-Sink Water Filters
  1. Home
  2. Tools & Home Improvement
  3. Kitchen & Bath Fixtures
  4. Water Filtration & Softeners
  5. Replacement Water Filters
  6. Replacement Under-Sink Water Filters
  7. Pentair Pentek GAC-20BB…
Pentek

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use - main product image
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₹16,090₹21,420

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Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use — Blue
Blue
₹16,090
₹21,420
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Estimated doorstep delivery by 20 Nov - 22 Nov from USA

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Reliable Heavy Duty Water Filtration

About this item

Pentair Pentek GAC-20BB is a 20" x 4.5" heavy-duty granular activated carbon filter designed for high-capacity water purification in Indian households. It effectively reduces chlorine taste & odor, improving water quality and taste. The cartridge allows maximum contact between water and carbon, ensuring optimal adsorption. Its construction ensures water passes through the entire carbon bed, minimizing channeling and bypass. The built-in post-filter reduces carbon fines and suspended particles, providing cleaner water. Compatible with all 20" Big Blue housings, it offers a rated capacity of 25,000 gallons at 4 gpm, suitable for high sediment and flow applications. Delivered via ExpressBox, with all duties included, it supports safe, clean drinking water in Indian kitchens.

Many Indian consumers report improved water taste and odor reduction, especially in high sediment areas. The cartridge's design ensures consistent performance over its lifespan. For best results, pair with a Fibredyne or Carbon Block pre-filter. Replacement is recommended every 6 months or when taste/flow declines, with a typical usage of 4 gallons per minute. The filter's NSF/ANSI 42 certification guarantees material safety and performance.

Order your Pentair Pentek GAC-20BB today for reliable, heavy-duty water filtration. Enjoy fast delivery, all duties paid, and a 14-day Smile Guarantee. Perfect for homes seeking high-capacity, effective chlorine removal, and improved water taste in India.

Key Features

  • CLEANER, BETTER-TASTING WATER - Reduces bad taste and odor, including chlorine taste and odor, for good general-purpose drinking water throughout your home.
  • FULL CARBON-BED CONTACT - Water travels the entire length of the granular activated carbon bed, and an internal expansion pad minimizes channeling and bypass for consistent, optimal adsorption.
  • NSF/ANSI 42 CERTIFIED WITH POST-FILTER - Tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements, with a built-in post-filter that reduces carbon fines and suspended particles.
  • FITS ALL 20-INCH BIG BLUE HOUSINGS - Measures 20" x 4.5" and fits any 20" Pentair Pentek Big Blue or other heavy-duty housing, replacing any 20" x 4.5" carbon cartridge.
  • 25,000-GALLON CAPACITY - Rated for up to 25,000 gallons of chlorine taste and odor reduction at 4 gpm and temperatures to 125°F. Replace about every 6 months or when taste or flow declines.

Why choose this product

Advanced Granular Activated Carbon Technology

The GAC-20BB uses a high-quality granular activated carbon bed that maximizes contact with water, effectively reducing chlorine, odors, and improving taste. Certified by NSF/ANSI 42, it ensures safe, reliable performance for Indian households seeking cleaner drinking water.

Ideal for High Sediment & Flow in Indian Homes

Designed to handle high sediment loads and flow rates common in Indian water supplies, this cartridge offers long-lasting performance with minimal channeling. Suitable for high-demand applications, it supports continuous, good-tasting water with minimal maintenance.

How to use

  • Turn off water supply — Switch off the water inlet to the housing unit. Unscrew the housing carefully using a filter wrench.
  • Remove old cartridge — Take out the used filter cartridge, dispose of it properly. Clean the housing with water and a mild detergent.
  • Insert new cartridge — Place the new GAC-20BB cartridge into the housing, ensuring proper alignment. Screw the housing back tightly.
  • Flush and restart — Turn on water, flush the system for 5-10 minutes to remove air and carbon fines. Ready for use.

Example scenarios

Typical situations where Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

Rajesh, 38, Mumbai, high sediment water causing frequent clogging in filters

How this product helps

Replaced with GAC-20BB, improved flow and taste, lasts 6 months, saving frequent replacements and improving water quality.

Material, capacity & care

Material & capacity

Active IngredientGranular Activated Carbon
Capacity25,000 gallons
Material SafetyFood-grade materials

Use & care

Recommended Replacement IntervalEvery 6 months or 25,000 gallons
Flow Rate4 gpm
Shelf LifeUnopened: 5 years
Reapplication Math4 gallons/minute, lasts 6 months
SupportHigh sediment, high flow applications

How we compare

FeaturePentair Pentek GAC-20BBOthers
Capacity25,000 gallons rated, lasts 6 months at 4 gpmIndian filters typically rated for 10,000-15,000 gallons, need replacement every 3-4 months
Material CertificationNSF/ANSI 42 certified for safety and performanceMany Indian filters lack NSF certification, performance varies
Fit & CompatibilityFits all 20" Big Blue housings, universal designMost Indian filters are size-specific, less universal fit
Flow RateRated for 4 gpm for continuous useIndian filters often rated for lower flow rates, less suitable for high demand

Product details

SKUxak9400
GTIN00051678249437
BrandPentek
ModelGAC-20BB
Size20" x 4.5"
ColorBlue
MaterialPleated Carbon-Impregnated

About Pentek

Pentair is a global leader in water filtration, known for reliable, NSF-certified products designed for safe drinking water worldwide.

Compliance & Legal

This is a dietary supplement; not intended to diagnose, treat, cure or prevent any disease.

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FAQ, See What Others Asked

How often should I replace this water filter?
Replace every 6 months or after filtering 25,000 gallons, whichever comes first. Actual lifespan depends on water quality and usage in Indian homes.
What contaminants does this filter reduce?
This filter reduces chlorine taste & odor, suspended particles, and improves water taste, certified by NSF/ANSI 42 for material safety.
Is this filter compatible with all 20" Big Blue housings?
Yes, it measures 20" x 4.5" and fits all standard 20" Big Blue housings used in Indian water filtration systems.
Does this filter remove fluoride?
This granular activated carbon filter primarily reduces chlorine, odors, and organic compounds. It does not effectively remove fluoride.
How do I install the replacement cartridge?
Turn off water, unscrew housing, remove old cartridge, insert new one, and flush for 5-10 minutes as per instructions. Supports Indian water systems.

Frequently bought together

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use

This item:

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use

₹16,090

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use

This item

Pentair Pentek GAC-20BB Big Blue Carbon Water Filter 20" x 4.5" | Heavy Duty Granular Activated Carbon for Home Use

₹16,090

Total price:

₹30,500

You save ₹12,310 (29%) Extra

3 items selected

3 items

₹30,500

You save ₹12,310 (29%) Extra

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Spec
Price
₹16,090
₹21,420
₹6,830
₹9,680
₹7,580
₹11,710
₹7,580
₹11,470
₹7,580
₹9,140
₹35,620
₹48,310
₹6,130
₹8,270
Brand NamePentekWaterdropWaterdropWaterdropWaterdropBilsteinSamsonite
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹16,090₹21,420

You Save ₹5,330

Estimated doorstep delivery by 20 Nov - 22 Nov from USA
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₹48,270+ (3× the price)
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