Rajesh, 38, Mumbai, high sediment water causing frequent clogging in filters
Replaced with GAC-20BB, improved flow and taste, lasts 6 months, saving frequent replacements and improving water quality.
You save 5,330 (25%)
Estimated doorstep delivery by 20 Nov - 22 Nov from USA






Reliable Heavy Duty Water Filtration
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.
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.
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.
Rajesh, 38, Mumbai, high sediment water causing frequent clogging in filters
Replaced with GAC-20BB, improved flow and taste, lasts 6 months, saving frequent replacements and improving water quality.
| Active Ingredient | Granular Activated Carbon |
| Capacity | 25,000 gallons |
| Material Safety | Food-grade materials |
| Recommended Replacement Interval | Every 6 months or 25,000 gallons |
| Flow Rate | 4 gpm |
| Shelf Life | Unopened: 5 years |
| Reapplication Math | 4 gallons/minute, lasts 6 months |
| Support | High sediment, high flow applications |
| Feature | Pentair Pentek GAC-20BB | Others |
|---|---|---|
| Capacity | 25,000 gallons rated, lasts 6 months at 4 gpm | Indian filters typically rated for 10,000-15,000 gallons, need replacement every 3-4 months |
| Material Certification | NSF/ANSI 42 certified for safety and performance | Many Indian filters lack NSF certification, performance varies |
| Fit & Compatibility | Fits all 20" Big Blue housings, universal design | Most Indian filters are size-specific, less universal fit |
| Flow Rate | Rated for 4 gpm for continuous use | Indian filters often rated for lower flow rates, less suitable for high demand |
| SKU | xak9400 |
| GTIN | 00051678249437 |
| Brand | Pentek |
| Model | GAC-20BB |
| Size | 20" x 4.5" |
| Color | Blue |
| Material | Pleated 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
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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

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%) Extra3 items selected
3 items
30,500You save 12,310 (29%) Extra
| Attributes | Current ![]() | ![]() | ![]() | ![]() | ![]() | ||
|---|---|---|---|---|---|---|---|
| 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 Name | Pentek | Waterdrop | Waterdrop | Waterdrop | Waterdrop | Bilstein | Samsonite |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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