--- product_id: 445347303 title: "Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20\" x 4.5\", 5 Micron , Black" brand: "pentek" price: "549.71 DT" currency: TND in_stock: true reviews_count: 13 category: "Pentek" url: https://www.desertcart.tn/products/445347303-pentair-pentek-c1-20bb-big-blue-carbon-water-filter-20 store_origin: TN region: Tunisia --- # 40,000 gallon capacity Fits all 20" Big Blue housings Dual-purpose filtration Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20" x 4.5", 5 Micron , Black **Brand:** pentek **Price:** 549.71 DT **Availability:** ✅ In Stock ## Summary > 💧 Elevate your home’s water game with the ultimate Big Blue filter! ## Quick Answers - **What is this?** Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20" x 4.5", 5 Micron , Black by pentek - **How much does it cost?** 549.71 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/445347303-pentair-pentek-c1-20bb-big-blue-carbon-water-filter-20) ## 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 - • **Heavy-Duty Build:** Carbon-impregnated cellulose media with external netting ensures durability and superior dirt-holding capacity. - • **All-in-One Purity Shield:** Filters sediment, chlorine, taste & odor in a single cartridge for crystal-clear water. - • **Long-Lasting Performance:** Handles up to 40,000 gallons before replacement—keep your water fresh all year long. - • **Certified Clean Confidence:** NSF-tested for reliable pollutant removal—because your health deserves the best. - • **Universal Fit, Zero Hassle:** Compatible with all 20" Pentair Big Blue and heavy-duty housings—upgrade without the guesswork. ## Overview The Pentair Pentek C1-20BB Big Blue Carbon Water Filter is a 20-inch, dual-purpose cartridge designed to fit all standard 20" heavy-duty filter housings. Featuring powdered activated carbon-impregnated cellulose media, it effectively removes fine sediment, chlorine, taste, and odor from tap water. With a robust 40,000-gallon capacity and NSF certification, this economical filter ensures clean, great-tasting water for up to a year in residential applications. ## Description Pentair Pentek C Series Cartridges offer an economical solution for all your general-purpose water filtration needs. Constructed of a carbon impregnated cellulose media, these dual-purpose cartridges filter out fine sediment particles and reduce unwanted taste, odor, and chlorine taste & odor from your tap water. External netting provides additional strength and dirt-holding capacity. C Series Cartridges are available in a variety of sizes and are nominally rated at 5-microns. These dual-purpose cartridges are well suited for a wide range of residential applications, and make excellent polishing filters when used in process or closed-loop streams. Review: Good replacement product - Good price Review: Great filter! Better flow rate & longer lasting than the "stock" coconut shell carbon filters I had been using - UPDATE: I'd increase this to 10 stars if I could. As a test I used the last one SIX WHOLE MONTHS! Obviously against manufacturer recommendations but in that time we had only a few times where we had chlorine smell/taste "leak" thru and that was only when we used a tremendous amount of water outside (filling kiddie pools & watering). It only lasted a few hours until the filter seemed to "catch up" as if it recuperated from the excessive use. And we use a LOT of water and our water from Detroit has a LOT of chlorine. Can't say we noticed a decrease in flow rate even after 6 months unlike other filters we've tried. So I HIGHLY recommend these filters & now have them on auto order thru desertcart. :) Decided to try these filters in our whole house casing after previously using the coconut shell filters recommended by the local water conditioning store that installed it for the 1st year. Both filters seemed to have nearly the same flow rate at 1st (at least close enough to not have discernible difference) but unlike the "stock" filters which had a very noticeable decrease in flow rate after even just the 1st month left alone by 3rd month where you couldn't take a shower while someone flushed a toilet, these Pentek show very little decrease in flow vs when 1st installed. To me that is a GIANT plus & why I'll keep using these filters. (Besides these are 1/3 of the cost on desertcart vs buying from that store) So downsides? Sure.. The water inside the canister turns black but haven't seen any black water coming out of the faucets so it doesn't seem to hurt anything. But the old filters didn't do that. Another thing I noticed is if you run a LOT of water thru this filter over a short duration (such as filling a 250 gallon kiddie pool or watering the lawn a lot) there begins to be a slight chlorine smell from the taps. Our city water is VERY strong chlorine smell & taste without this filter so that doesn't surprise me really. This filter just can't keep up with massive amounts of water going thru it but I wasn't too bothered by it especially considering the filter was already months old & even then it still recovered after a day or two with little to no smell again. Although I did order a replacement from desertcart & plan to replace it soon anyway since we're approaching 6 months on this last filter. Money well spent! ## Features - DUAL-PURPOSE CARTRIDGE filters out fine sediment particles and reduces unwanted taste, odor and chlorine from your tap water in a single filter - FITS ALL 20" Pentair Pentek Big Blue or other 20" heavy duty filter housings and can replace any 20" x 4.5" carbon filter cartridge - ECONOMICAL WATER FILTRATION SOLUTION for use in residential chlorinated water supplies - EXCELLENT POLISHING FILTER when used in process or closed-loop streams - 40,000 GALLON CAPACITY. Replace every 1 year or when you notice a change in water pressure or quality ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0057FXPDW | | Best Sellers Rank | #10,762 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #84 in Replacement Under-Sink Water Filters | | Brand | Pentek | | Brand Name | Pentek | | Customer Reviews | 4.6 out of 5 stars 1,078 Reviews | | External Testing Certification | NSF | | Global Trade Identification Number | 00051678651438 | | Included Components | Carbon Water Filter | | Item Dimensions D x W x H | 20.5"D x 5.5"W x 5.5"H | | Item Type Name | Carbon Water Filter C1 | | Item Weight | 2.45 Pounds | | Manufacturer | Pentair Industries | | Manufacturer Part Number | 155651-43 | | Manufacturer Warranty Description | 30 day manufacturer | | Material | Polypropylene (PP) | | Material Type | Polypropylene (PP) | | Model Number | C1-20BB | | Number of Items | 1 | | Product Benefits | Removes Pollutants | | Product Dimensions | 20.5"D x 5.5"W x 5.5"H | | Set Name | Big Blue | | UPC | 051678651438 | | Unit Count | 1.0 Count | ## Product Details - **External Testing Certification:** NSF - **Item Weight:** 2.45 Pounds - **Material:** Polypropylene (PP) - **Product Benefits:** Removes Pollutants - **Product Dimensions:** 20.5"D x 5.5"W x 5.5"H ## Images ![Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20" x 4.5", 5 Micron , Black - Image 1](https://m.media-amazon.com/images/I/71HkVHkEsdL.jpg) ![Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20" x 4.5", 5 Micron , Black - Image 2](https://m.media-amazon.com/images/I/61sieKNZ64L.jpg) ![Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20" x 4.5", 5 Micron , Black - Image 3](https://m.media-amazon.com/images/I/71ZZBSPbwML.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Is this tha same as am. plumber w5cip478?** A: Yes, this is the same filter, it just has a different brand name on the label. Both brands (American Plumber and Pentek) are owned by Pentair. **Q: What size are the inlet and outlet nipples?** A: I really don't know. They fit the filter canister that I bought from my plumber. **Q: I have a model ccf-201 ametek filter system. what filter will be great to replace the cartridges with?** A: Probably best to go to the manufacturer's website and see what they recommend **Q: What is the carbon made from? What is the cellulose powder made from?** A: We use the C1-20 Carbon filter in our ware treatment system for our summer cabin. It is one of 4 filters, plus a UV-Light. I assume the carbon filter is some sort of activated carbon for controlling the taste of the water. Lov2Read ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good replacement product *by M***L on April 21, 2026* Good price ### ⭐⭐⭐⭐⭐ Great filter! Better flow rate & longer lasting than the "stock" coconut shell carbon filters I had been using *by B***L on July 1, 2016* UPDATE: I'd increase this to 10 stars if I could. As a test I used the last one SIX WHOLE MONTHS! Obviously against manufacturer recommendations but in that time we had only a few times where we had chlorine smell/taste "leak" thru and that was only when we used a tremendous amount of water outside (filling kiddie pools & watering). It only lasted a few hours until the filter seemed to "catch up" as if it recuperated from the excessive use. And we use a LOT of water and our water from Detroit has a LOT of chlorine. Can't say we noticed a decrease in flow rate even after 6 months unlike other filters we've tried. So I HIGHLY recommend these filters & now have them on auto order thru Amazon. :) Decided to try these filters in our whole house casing after previously using the coconut shell filters recommended by the local water conditioning store that installed it for the 1st year. Both filters seemed to have nearly the same flow rate at 1st (at least close enough to not have discernible difference) but unlike the "stock" filters which had a very noticeable decrease in flow rate after even just the 1st month left alone by 3rd month where you couldn't take a shower while someone flushed a toilet, these Pentek show very little decrease in flow vs when 1st installed. To me that is a GIANT plus & why I'll keep using these filters. (Besides these are 1/3 of the cost on amazon vs buying from that store) So downsides? Sure.. The water inside the canister turns black but haven't seen any black water coming out of the faucets so it doesn't seem to hurt anything. But the old filters didn't do that. Another thing I noticed is if you run a LOT of water thru this filter over a short duration (such as filling a 250 gallon kiddie pool or watering the lawn a lot) there begins to be a slight chlorine smell from the taps. Our city water is VERY strong chlorine smell & taste without this filter so that doesn't surprise me really. This filter just can't keep up with massive amounts of water going thru it but I wasn't too bothered by it especially considering the filter was already months old & even then it still recovered after a day or two with little to no smell again. Although I did order a replacement from Amazon & plan to replace it soon anyway since we're approaching 6 months on this last filter. Money well spent! ### ⭐⭐⭐⭐⭐ Filter *by I***. on March 9, 2026* Water filter works great ## Frequently Bought Together - Pentair Pentek C1-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Dual Purpose Powdered Activated Carbon-Impregnated Cellulose Replacement Cartridge, 20" x 4.5", 5 Micron , Black - Pentair Pentek 158204 Traditional Slim Line Filter Housing, 1/2" NPT #20 Whole House Opaque Water Filter Housing with Pressure Relief Button, 20-Inch, Blue - Pentair Pentek P5 Sediment Water Filter, 10-Inch, Under Sink Spun-Bonded Polypropylene Replacement Cartridge, 10" x 2.5", 5 Micron --- ## 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.tn/products/445347303-pentair-pentek-c1-20bb-big-blue-carbon-water-filter-20](https://www.desertcart.tn/products/445347303-pentair-pentek-c1-20bb-big-blue-carbon-water-filter-20) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-05*