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Purcooflow 20" x 4.5" 5 Micron CTO⁺ Specialized PFAS Removal Filter - Whole House Carbon Block for PFOA/PFOS & Chlorine
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Specialized PFAS (PFOA/PFOS) Defense: Reduces PFAS (PFOA & PFOS) with advanced adsorption media designed to target “forever chemicals” that standard filters may not address. Third-party SGS Test Teport available.
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Superior 2-in-1 CTO⁺ Filtration: Combines premium chlorine reduction carbon with specialized media to help reduce synthetic chemicals, VOCs and other unwanted contaminants.
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Premium Coconut Shell Carbon: Made with high-iodine-value coconut shell activated carbon for extensive surface area and efficient contaminant adsorption.
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Whole-House Big Blue Compatibility: Designed for standard 20" x 4.5" Big Blue housings to support high-flow whole-house filtration applications.
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5-Micron Precision & Certified-Safe Materials: Rated at 5 microns for fine sediment reduction and made from BPA-free, food-grade materials for safe water contact.
- Extended 100,000-Gallon Capacity: Provides up to 100,000 gallons or 6–12 months of filtration, depending on water quality and usage.
- Free Shipping On all orders
- 30-Day Return No worries
- 2 Year Warranty Hassle-free
Why PFAS Filtration Matters
The "Forever" Chemical Threat
PFAS (PFOA/PFOS) have extremely strong carbon-fluorine bonds, meaning they never fully break down naturally. They accumulate in the environment and human organs day after day, year after year.
The Standard Filter Carbon Gap
Standard carbon filters are not specifically engineered to target PFAS molecules, allowing them to pass through untreated. Microscopic PFAS chemical chains easily pass straight through standard systems, entering your kitchen and bathroom.
Molecular-Level Interception
Standard filtration stops at physical debris. Our Stage 3 features an advanced, active specialized media engineered to attract and permanently bind microscopic carbon-fluorine chains, ensuring heavy-duty chemical protection before water enters your home.
PFAS Contamination Is Closer Than You Think
Recent nationwide laboratory tests reveal that "forever chemicals" have heavily contaminated the water grid. PFAS do not stay at industrial waste sites—they flow into local rivers and pass straight through aging municipal water treatment facilities into your home.
*Source: EWG (Environmental Working Group) PFAS Interactive Contamination Map Database. Click search to view certified contamination zones in your state.
Whole-Home Water Protection
Better Shower Water
Reduces chlorine and unwanted impurities that may affect your skin and hair, helping you enjoy a fresher, more comfortable shower.
Better Cooking & Drinking Water
Helps reduce sediment and common contaminants, supporting better-tasting water for cooking and food preparation.
Help Extend Appliance Life
Helps minimize buildup in pipes and water-using appliances, supporting long-term performance and efficiency.
Tech Specs - CTO⁺ Specialized PFAS Removal Filter
PFAS, PFOA, PFOS & Chlorine
Specialized Ion-Exchange Carbon Block
5 Micron
Standard 20" x 4.5"
Up to 98% Reduction of PFAS
104°F (40°C)
80,000 - 100,000 Gallons
90 psi
Meets NSF/ANSI 53 Standards
Universal 20" BB 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.
FAQs
Learn how Purcooflow's advanced CTO⁺ technology helps reduce PFAS, chlorine, and other unwanted contaminants for cleaner, safer whole-house water.
Contact SupportPFAS, including PFOA and PFOS, are man-made chemicals often referred to as "forever chemicals" because they can persist in the environment and water supplies for long periods. Many homeowners choose specialized filtration to help reduce potential PFAS exposure from household water.
Unlike standard carbon block filters that primarily target chlorine, taste, and odor, the Purcooflow CTO⁺ cartridge combines premium coconut shell carbon with specialized PFAS-reduction media engineered to target PFOA, PFOS, and other persistent contaminants that ordinary filters may not effectively address.
Yes. In addition to PFAS reduction, the CTO⁺ carbon block helps reduce chlorine, unpleasant tastes, odors, VOCs, and other common chemical contaminants, providing broader water quality improvement throughout the home.
For most households, replacement is recommended every 6–12 months depending on water quality and usage. The cartridge is designed for extended whole-house filtration performance with a rated capacity of up to 80,000 gallons.
Yes. The cartridge is manufactured to standard 20" x 4.5" Big Blue dimensions and is compatible with most industry-standard BB filter housings used in whole-house filtration systems.
For households concerned about emerging contaminants, a specialized PFAS filter provides an additional layer of protection beyond standard sediment or chlorine filtration. The advanced adsorption media is specifically engineered to target PFAS compounds while maintaining reliable whole-house water flow.