20" BB Carbon Block
The AMPAC USA 20" BB Carbon Block (CB-520-BB) is a jumbo activated carbon block cartridge built for Big Blue 4.5" x 20" filter housings, designed to reduce chlorine, chloramines, unpleasant tastes and odors, and volatile organic compounds (VOCs) from residential and commercial water supplies.
- Reduces chlorine and chloramines
- Removes unpleasant tastes and odors
- Reduces volatile organic compounds (VOCs)
- Compressed carbon block matrix for uniform flow and no channeling
- Fits standard Big Blue 4.5" x 20" filter housings
Unlike loose granular activated carbon cartridges, the CB-520-BB uses a compressed carbon block matrix that forces water through a uniform flow path, maximizing contact time with the activated carbon media. That consistent structure prevents channeling — the common failure mode in granular filters where water bypasses the media — so every gallon that passes through gets thorough, consistent treatment.
In residential whole-house systems, it delivers better-tasting drinking water, clearer water for cooking, and chlorine-free showering and bathing at every fixture. Commercial operations like restaurants, hotels, and schools use it as a cost-effective, high-capacity option for general water quality improvement or as a pre-filtration stage in larger purification systems.
The CB-520-BB is built from premium activated carbon media with precision engineering behind the compressed block construction, giving it the performance and durability AMPAC USA products are known for.
At AMPAC USA, we take pride in delivering not just industry-leading water purification solutions but also unmatched technical support to ensure seamless operation and customer satisfaction. Our dedicated support team comprises highly trained professionals who bring together deep engineering expertise and a commitment to exceptional service. Whether you require troubleshooting assistance, product guidance, installation support, or maintenance recommendations, our team is here to help.
How We Support You:
✔ Expert Consultation – Need help selecting the right reverse osmosis system, desalination unit, or water treatment solution? Our specialists will guide you based on your unique requirements.
✔ 24/7 Technical Assistance – We understand the urgency of water purification needs. Our support team is readily available to resolve issues and keep your operations running smoothly.
✔ Installation & Setup Guidance – Whether it’s a commercial, industrial, or residential system, we provide step-by-step assistance to ensure optimal installation and efficiency.
✔ Troubleshooting & Repairs – Facing operational issues? Our experts will diagnose problems quickly and recommend the best solutions, including spare parts, system optimizations, and repairs.
✔ Preventive Maintenance Support – Extend the lifespan of your equipment with routine maintenance guidelines and service schedules tailored to your system.
Phone: 909-548-4900 | Email: info@ampac1.com
Frequently Asked Questions
What does the 20" BB Carbon Block remove from water?
It reduces chlorine, chloramines, unpleasant tastes and odors, and volatile organic compounds (VOCs).
How is a carbon block different from a granular carbon filter?
The CB-520-BB uses a compressed carbon block matrix that creates a uniform flow path and maximizes contact time with the media, preventing the channeling that can reduce effectiveness in loose granular filters.
What size housing does this filter fit?
It's built for standard Big Blue 4.5" x 20" filter housings, common in whole-house and high-flow filtration systems.
Is this filter suitable for commercial use?
Yes. Restaurants, hotels, schools, and other businesses use it for general water quality improvement or as a pre-filtration stage in larger systems.
Will this filter improve the taste of my drinking water?
Yes. By reducing chlorine, chloramines, and VOCs, it directly addresses the contaminants most responsible for off-tastes and odors in tap water.