About This

• 【Universal Compatible Models】 Purewell square activated carbon filter is a direct replacement for ProOne Big+ / Big II and Berlkey BB9-2 black filters. Compatible with Berlkey Travel, Big, Royal, Imperial, Light, and Crown Series, as well as the Purewell Gravity-Fed Water Filter System. Precision-engineered tight seal ensures leak-free installation and connects easily with Fluoride or Alkaline Filters for multi-stage purification. Note: Not affiliated with or sponsored by Berlkey or ProOne. Purewell is an independent water purification brand.
• [Advanced 5-Stage Filtration] Certified by NSF/ANSI 53 & 42 & 372, our composite filter features advanced 5-stage filtration technology, including a 0.01μm hollow fiber ultrafiltration membrane, PFAS, and Fluoride removal media, a silver ion barrier and high-density activated carbon block.This multi-layer design delivers efficient purification. This design removes 99.9% of chlorine, rust, sediment, organic compounds, and heavy metals, plus 90% fluoride. Compliant with lead-free standards, it ensures safety and reliability for everyday use.
• 【Innovative Fluoride Removal Technology】This black composite filter combines high-quality activated carbon and fluoride removal material (not harmful alumina). It effectively removes up to 90% of fluoride while ensuring safe use. Additionally, the filter features an ultra-fine pore size of 0.01 microns, a significant improvement over the typical 0.2 microns found in other brands, effectively removing 99.99% of contaminants, providing safer drinking water and significantly reducing health risks.
• 【Extended 2-Year Lifespan】 Designed for long-term, reliable performance, each square activated carbon filter delivers up to 10,000 gallons of purified water, while a pair provides up to 20,000 gallons total—lasting up to 2 years depending on water quality and daily use. With a filtration surface area over 2 larger than standard carbon filters, it maximizes water-media contact for more efficient purification, stable flow, and longer-lasting, high-performance filtration with fewer replacements.
• 【Cost-Effective Hydration Solution】 Each Purewell replacement water filter can replace up to 75,000 single-use plastic water bottles, helping you significantly reduce bottled water expenses over time. Designed for long-lasting performance and consistent filtration, it delivers reliable, high-quality water for the whole family. Enjoy dependable daily hydration with a durable filter built for efficiency and professional-level purification. Note: TDS levels do not fully reflect water quality, and this filter is not designed to reduce TDS.

Overview

• Material : Acrylonitrile Butadiene Styrene (ABS), Activated Carbon, Polyester, Polypropylene (PP)
• Product Dimensions : 4"D x 6"W x 9"H
• Item Weight : 2.1 Pounds
• External Testing Certification : NSF, ANSI
• Product Benefits : Reduce Fluoride, Reduces Chlorine