--- product_id: 437623039 title: "Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20\" x 4.5\", 25 Micron, Pack of 6, White" brand: "pentek" price: "S$1163" currency: SGD in_stock: true category: "Pentek" url: https://www.desertcart.sg/products/437623039-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole store_origin: SG region: Singapore --- # 100,000 gallon capacity Radial flow tech <1 psi pressure drop NSF certified for safety & quality Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White **Brand:** pentek **Price:** S$1163 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your home’s hydration game with pro-grade, whole-house carbon filtration! ## Quick Answers - **What is this?** Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White by pentek - **How much does it cost?** S$1163 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/437623039-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole) ## Best For - pentek enthusiasts ## Why This Product - Trusted pentek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Pack Convenience:** Six-pack supply keeps your whole house filtration system running without interruption. - • **Long-Lasting Performance:** Filters over 100,000 gallons—up to a year of premium water before replacement. - • **Trusted Quality Assurance:** NSF/ANSI Standard 42 certified for reliable contaminant reduction and material safety. - • **Whole-House Purity, Every Tap:** Eliminates chlorine taste & odor for fresher water throughout your home. - • **Effortless Flow, Maximum Efficiency:** Radial flow design ensures ultra-low pressure drop (<1 psi at 4 gpm) for seamless water delivery. ## Overview The Pentair Pentek RFC-20BB is a heavy-duty 20" radial flow carbon water filter cartridge designed for whole-house use. Featuring granular activated carbon and a unique radial flow design, it reduces chlorine taste and odor with minimal pressure drop (<1 psi at 4 gpm). NSF certified and compatible with Big Blue housings, it delivers over 100,000 gallons of clean water—lasting up to a year. Sold in a convenient 6-pack, it’s engineered for high-flow systems and easy replacement every 6-12 months. ## Description The Pentair Pentek RFC-20BB is a 20-inch radial flow carbon cartridge that reduces chlorine taste and odor across your whole house. A bed of granular activated carbon (GAC) is held between a porous polyethylene outer shell and a spun polypropylene core, so water flows radially through the carbon for effective taste and odor reduction.The radial flow design keeps pressure drop very low, under 1 psi at 4 gpm, while significantly reducing the release of carbon fines that are common with standard GAC cartridges. With more than 100,000 gallons of chlorine taste and odor capacity, it is built for point-of-entry and other high-flow applications and can provide up to a year of service before replacement.The 20" x 4.5" cartridge fits Pentair Pentek Big Blue and other heavy duty housings and replaces most 20-inch carbon cartridges. The RFC-BB and RFC20-BB are tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements. Replace every 6 to 12 months or when chlorine taste and odor return. This listing is a Pack of 6. ## Features - CLEANER, BETTER-TASTING WATER - Reduces chlorine taste and odor throughout your whole house using a deep bed of granular activated carbon, delivering fresher water to every tap. - RADIAL FLOW TECHNOLOGY - Water flows radially through the carbon bed for a very low pressure drop, under 1 psi at 4 gpm, while significantly reducing the carbon fines common to standard granular carbon cartridges. - 100,000 GALLON CAPACITY - Delivers more than 100,000 gallons of chlorine taste and odor reduction at 4 gpm, providing up to a year of whole house filtration before replacement. - NSF CERTIFIED, FITS BIG BLUE - Tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements; fits any 20" x 4.5" Big Blue or heavy duty housing and replaces most 20-inch carbon cartridges. - BUILT FOR HIGH-FLOW SERVICE - Ideal as a point-of-entry filter for high-flow whole house systems; replace every 6 to 12 months or when you notice a return of chlorine taste and odor. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09MSWW43N | | Best Sellers Rank | #418,629 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,712 in Replacement Under-Sink Water Filters | | Brand Name | Pentek | | Customer Reviews | 5.0 5.0 out of 5 stars (7) | | External Testing Certification | NSF | | Global Trade Identification Number | 30051678247434 | | Included Components | Carbon Water Filter | | Item Dimensions D x W x H | 4.5"D x 4.5"W x 20"H | | Item Type Name | Carbon Water Filter | | Item Weight | 29.3 pounds | | Manufacturer | Pentair | | Manufacturer Part Number | 155247-43-APC | | Manufacturer Warranty Description | 30 day manufacturer | | Material Type | Polyethylene (PE), Polypropylene (PP) | | Model Number | RFC-20BB | | Number of Items | 6 | | Product Benefits | Removes Pollutants | | Set Name | Pack of 6 | | Unit Count | 6 Count | ## Product Details - **External Testing Certification:** NSF - **Item Weight:** 29.3 pounds - **Material:** Polyethylene (PE), Polypropylene (PP) - **Product Benefits:** Removes Pollutants - **Product Dimensions:** 4.5"D x 4.5"W x 20"H ## Images ![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Image 1](https://m.media-amazon.com/images/I/61yeSLMKuQL.jpg) ## Frequently Bought Together - Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20" x 4.5", 5 Micron, Pack of 6, White - Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/437623039-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole](https://www.desertcart.sg/products/437623039-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-05*