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-reduction media, and alkaline materials, a silver ion barrier and high-density activated carbon block. This powerful system removes 99.9% of chlorine, rust, sediment, PFAS, organics and heavy metals, filters common impurities, alkalizes tap, well and lake water, improves taste and retaining health-essential minerals.
• 【Enjoy Healthy Alkaline Water】 This upgraded composite alkaline filter is expertly engineered to effectively raise the pH level of tap water, well water and lake water, delivering premium alkaline drinking water for daily life. It not only boosts overall bodily health and accelerates natural detoxification, but also effectively enhances bone density and optimizes digestive system function, meeting the daily healthy water needs of the whole family.
• 【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 : Activated Carbon, Silver Ion, Hollow Fiber UF Membrane
• Product Dimensions : 4"D x 6"W x 9"H
• Item Weight : 2.1 Pounds
• External Testing Certification : NSF
• Product Benefits : Acrylonitrile Butadiene Styrene(ABS), Polyester, Polypropylene, Reduce Chlorine,raise the pH level 8-9 Acrylonitrile Butadiene Styrene(ABS), Polyester, Polypropylene, Reduce Chlorine,raise the pH level 8-9