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Purcooflow WHF2045B301 Replacement Filter Set – 20" x 4.5", 3-Stage PP + GAC + CTO Cartridges
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Advanced 3-Stage Whole Water Filtration: Combines 5-micron PP sediment filtration, GAC granular activated carbon, and a premium CTO carbon block to reduce particulates, chlorine, odors, and common chemical contaminants in one complete filtration set.
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Stage 1 Sediment Protection (5-Micron PP Filter): Captures rust, sand, dirt, and suspended particles while helping protect downstream carbon filters for longer-lasting filtration performance.
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Dual Carbon Filtration for Enhanced Chlorine Reduction: The GAC + CTO dual-carbon configuration increases contact time and adsorption efficiency to help reduce chlorine, chloramine taste and odor, VOCs, and unwanted chemical impurities.
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Universal 20" Filter Compatibility: Compatible with most standard 20" x 4.5" filter cartridges, including sediment and carbon filters—giving you flexible replacement options without being locked into proprietary filters.
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Premium Materials for Reliable Performance: Made with 100% coconut shell activated carbon and virgin polypropylene for dependable filtration performance using food-grade, BPA-free materials you can trust.
- Free Shipping On all orders
- 30-Day Return No worries
- 2 Year Warranty Hassle-free
Tech Specs - PP+GAC+CTO Filter Set
PP Cotton + Activated Carbon + Granular Carbon
15 GPM
>95% Efficiency
20" x 4.5" (Big Blue)
104°F (40°C)
90 psi
Up To 100,000 Gallons
Food Grade PP / EPDM
90 psi
Universal 20" BB Fitment
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.