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Purcooflow 20" x 4.5" 5 Micron GAC Granular Activated Carbon Filter - High-Flow Coconut Shell Replacement Cartridge
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Superior Adsorption Surface: Packed with premium, lab-tested Granular Activated Carbon (GAC) derived from high-quality coconut shells. Its porous structure provides an expansive surface area for maximum absorption of chlorine and organic chemicals.
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Enhanced Water Taste & Clarity: Specifically engineered to eliminate the "rotten egg" smell (hydrogen sulfide), metallic tastes, and cloudy appearances. Enjoy crisp, refreshing water directly from every tap in your home.
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Optimal High-Flow Performance: The granular design allows water to flow freely through the media with minimal pressure drop. It is the ideal choice for large households and commercial sites that require high volumes of water without compromising on purity.
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Universal Big Blue Compatibility: Standard 20-inch x 4.5-inch dimensions ensure a perfect fit for all major brands of "Big Blue" (BB) whole-house filter housings. Easy to install and replace for DIY maintenance.
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Built-in Protection Layers: Features an integrated internal 5-micron spun polypropylene post-filter. This prevents carbon fines (black dust) from escaping into your water line, ensuring clean water and protecting your plumbing fixtures.
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Tech Specs - GAC Granular Carbon
Activated Granular Carbon
Chlorine, Taste & Odor Removal
Standard 20" x 4.5"
15 GPM
104°F (40°C)
5 Micron
Up To 100,000 Gallons
90 psi
5 - 10
Fits Standard 20" x 4.5" Housings
Compatible with Most 20" × 4.5" Big Blue Housings
Designed to fit most standard 20" × 4.5" Big Blue filter housings used in whole-house water filtration systems. Easy replacement, dependable performance, and broad compatibility.
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| Primary Filtration Focus | |||
| Primary Focus | Chlorine, Taste & Odor | Advanced Chemical Reduction | Sediment Removal |
| Best at Removing | |||
| Best at Removing | Chlorine, Bad Taste & Odor | Chlorine, VOCs & Organic Chemicals | Sand, Silt, Rust & Dirt |
| Filtration Precision | |||
| Filtration Precision | 5 Micron | 5 Micron | 5 Micron |
| Filter Media | |||
| Filter Media | Premium Coconut Shell GAC | High-Density Carbon Block | 100% Melt-Blown Polypropylene |
| Filter Life | |||
| Filter Life | 6–12 Months | 6–12 Months | 3–6 Months |
| Recommended Water Source | |||
| Recommended For | Municipal / City Water | Municipal / Treated Tap Water | Well Water & Sediment-Rich Water |
| Best For | |||
| Best For | Improving Water Taste & Removing Odors | Enhanced Chemical Reduction & Daily Drinking Water | Removing Dirt & Protecting Downstream Filters |
| Typical Installation | |||
| Typical Stage | Stage 2 | Stage 3 | Stage 1 |
FAQs
Learn how Purcooflow's high-flow granular activated carbon technology improves water taste, reduces odors, and delivers reliable whole-house filtration performance.
Contact SupportThe Purcooflow GAC filter is designed to reduce chlorine, unpleasant tastes, odors, hydrogen sulfide (rotten egg smell), VOCs, and other common organic contaminants. It helps deliver cleaner, fresher, and better-tasting water throughout your home.
Granular Activated Carbon (GAC) offers exceptionally low pressure drop and high flow performance. It is an excellent choice for whole-house systems where maintaining strong water flow and improving taste and odor are top priorities.
No. The open granular carbon structure is specifically designed for high-flow applications. With flow rates up to 15 GPM, most households can enjoy effective filtration without sacrificing water pressure.
Most households should replace the GAC cartridge every 6–12 months. Replacement frequency depends on water quality, chlorine concentration, and household water usage. The filter is rated for up to 100,000 gallons of filtration capacity.
The integrated 5-micron post-filter helps capture fine carbon particles before they enter your plumbing system. This design helps ensure cleaner water and minimizes the possibility of carbon fines reaching faucets and fixtures.
Yes. The cartridge is manufactured to standard 20" x 4.5" Big Blue dimensions and is compatible with most major whole-house filter housings that accept standard BB replacement cartridges.