--- product_id: 510577798 title: "Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20\" x 4.5\", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4" brand: "pentek" price: "¥119268" currency: JPY in_stock: true category: "Pentek" url: https://www.desertcart.jp/products/510577798-pentair-pentek-gac-20bb-big-blue-granular-activated-carbon-water store_origin: JP region: Japan --- # 25,000 gal chlorine reduction 20" x 4.5" Big Blue drop-in fit NSF/ANSI Standard 42 certified Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 **Brand:** pentek **Price:** ¥119268 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your hydration game with Pentair’s powerhouse filtration! ## Quick Answers - **What is this?** Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 by pentek - **How much does it cost?** ¥119268 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/510577798-pentair-pentek-gac-20bb-big-blue-granular-activated-carbon-water) ## 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 - • **Seamless Compatibility:** Direct drop-in replacement for Pentair Pentek Big Blue 20" housings—easy upgrade, no hassle. - • **Pure Water, Zero Compromise:** Granular activated carbon slashes chlorine, taste, and odor for refreshingly clean water. - • **Long-Lasting Filtration Power:** Each cartridge filters up to 25,000 gallons at 4 gpm, minimizing reorder frequency. - • **Certified Safety You Can Trust:** NSF/ANSI Standard 42 certification guarantees premium material quality and safety. - • **Built to Last, Engineered to Perform:** Internal polypropylene pad prevents channeling, ensuring every drop is filtered evenly. ## Overview The Pentair Pentek GAC-20BB is a 20" granular activated carbon water filter cartridge designed for Big Blue housings. Certified by NSF/ANSI Standard 42, it effectively reduces chlorine, taste, and odor, delivering up to 25,000 gallons of cleaner water at a steady 4 gpm flow rate. Its internal polypropylene expansion pad and post-filter ensure consistent filtration performance and structural integrity, making it a reliable, long-lasting solution for whole-house or commercial water filtration needs. ## Description The Pentair Pentek GAC-20BB delivers reliable granular activated carbon filtration for whole-house and commercial systems equipped with Big Blue 20-inch housings. Each cartridge reduces chlorine, taste, and odor using a proven GAC media bed, providing cleaner water at a steady flow rate with only 10 psi of pressure drop at 4 gpm.Engineered for consistent performance, the GAC-20BB features an internal polypropylene expansion pad that minimizes channeling and bypass, ensuring water passes evenly through the carbon bed. A spun polypropylene post-filter captures carbon fines before they reach your tap. Polystyrene end caps and outer casing provide structural integrity, while Buna-N and Santoprene gaskets ensure a secure, leak-free seal.Each cartridge is NSF/ANSI Standard 42 certified for material requirements and delivers up to 25,000 gallons of chlorine reduction capacity at 4 gpm. This 4-pack provides extended coverage for households and facilities that depend on dependable water filtration year-round. ## Features - CLEANER, BETTER-TASTING WATER - Granular activated carbon effectively reduces chlorine, unwanted taste, and odor for improved water quality throughout your home or facility - MINIMIZED CHANNELING AND CARBON FINES - Internal polypropylene expansion pad prevents water from bypassing the carbon bed, while a spun polypropylene post-filter traps loose fines - NSF/ANSI STANDARD 42 CERTIFIED - Tested and certified by NSF International for material requirements, giving you confidence in the safety and quality of every cartridge - FITS 20" PENTAIR PENTEK BIG BLUE HOUSINGS - Designed as a direct drop-in replacement cartridge (4.50" x 20") for Big Blue filter systems; operates at 40-125 degrees F - 25,000-GALLON CHLORINE REDUCTION CAPACITY - Extended filter life at 4 gpm flow rate; this convenient 4-pack keeps your system running with fewer reorder interruptions ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BMFGX9JR | | Best Sellers Rank | #7,946 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #57 in Replacement Under-Sink Water Filters | | Brand Name | Pentek | | Customer Reviews | 4.6 4.6 out of 5 stars (1,310) | | External Testing Certification | NSF | | Global Trade Identification Number | 30051678249438 | | Item Dimensions D x W x H | 4.5"D x 4.5"W x 20"H | | Item Type Name | GAC Carbon Water Filter | | Item Weight | 20 pounds | | Manufacturer | Pentair | | Manufacturer Part Number | 155249-43 | | Material Type | Activated Carbon,Carbon | | Model Number | GAC-20BB | | Number of Items | 4 | | Product Benefits | Reduces Chlorine | | Set Name | 4 | | Unit Count | 4 Count | ## Product Details - **External Testing Certification:** NSF - **Item Weight:** 20 pounds - **Material:** Activated Carbon,Carbon - **Product Benefits:** Reduces Chlorine - **Product Dimensions:** 4.5"D x 4.5"W x 20"H ## Images ![Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 - Image 1](https://m.media-amazon.com/images/I/71OBYDaBmAL.jpg) ![Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 - Image 2](https://m.media-amazon.com/images/I/81Nl6X4thyL.jpg) ![Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 - Image 3](https://m.media-amazon.com/images/I/81HxErBaqGL.jpg) ![Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 - Image 4](https://m.media-amazon.com/images/I/61aHZKgvv3L.jpg) ![Pentair Pentek GAC-20BB Big Blue Granular Activated Carbon Water Filter, 20" x 4.5", Chlorine Taste Odor Reduction, NSF Certified, Pack of 4 - Image 5](https://m.media-amazon.com/images/I/71ZZBSPbwML.jpg) ## Available Options This product comes in different **Size, Style** options. --- ## 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.jp/products/510577798-pentair-pentek-gac-20bb-big-blue-granular-activated-carbon-water](https://www.desertcart.jp/products/510577798-pentair-pentek-gac-20bb-big-blue-granular-activated-carbon-water) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-14*