--- product_id: 2709182 title: "Pentair OMNIFilter CB3 Carbon Water Filter, 10\" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10\" x 2.5\", 0.5 Micron" brand: "pentair" price: "$115.35" currency: USD in_stock: true category: "Pentair" url: https://www.desertcart.us/products/2709182-pentair-omnifilter-cb3-carbon-water-filter-10-under-sink-carbon store_origin: US region: United States of America --- # 400-gallon capacity 0.5 Micron filtration NSF certified safety Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron **Brand:** pentair **Price:** $115.35 **Availability:** ✅ In Stock ## Summary > 💦 Drink Pure, Live Pure! ## Quick Answers - **What is this?** Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron by pentair - **How much does it cost?** $115.35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2709182-pentair-omnifilter-cb3-carbon-water-filter-10-under-sink-carbon) ## Best For - pentair enthusiasts ## Why This Product - Trusted pentair brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Peace of Mind:** NSF/ANSI certified for your safety. - • **Universal Fit:** Compatible with major under-sink systems. - • **Certified Clean:** Reduces up to 97% of harmful PFOA/PFOS. - • **Transform Your Water:** Say goodbye to bad taste and odor! - • **Long-Lasting Performance:** Enjoy clean water for up to 6 months. ## Overview The Pentair OMNIFilter CB3 Carbon Water Filter is a high-performance undersink filter cartridge designed to significantly improve the taste and quality of your drinking water. With a 0.5-micron filtration capability, it effectively reduces chlorine, lead, and harmful contaminants like PFOA/PFOS, ensuring you enjoy cleaner, clearer water. This NSF-certified filter has a capacity of 400 gallons and is compatible with various under-sink systems, making it a reliable choice for health-conscious consumers. ## Description The Pentair OMNIFilter CB3 is a premium 0.5-micron carbon block replacement cartridge designed for under-sink drinking water filtration. It reduces up to 97% of PFOA and PFOS "forever chemicals," along with lead, chlorine taste and odor, cysts, VOCs, and other contaminants for cleaner, clearer, better tasting water at the tap.NSF/ANSI 42 and 53 certified, the CB3 uses dense carbon block technology that captures contaminants at a finer level than standard granular carbon filters. With a 400-gallon capacity, this cartridge is suited for under-sink point-of-use applications where high-quality drinking water is the priority.The CB3 pairs best with Pentair OMNIFilter CBF1, CBF3, OT32, and USM2 under-sink systems, and fits standard 10" x 2.5" housings from other major manufacturers. Replace approximately every 6 months or when water flow or quality decreases. ## Features - REDUCES PFOA/PFOS UP TO 97% - This 0.5-micron carbon block cartridge reduces "forever chemicals," chlorine taste and odor, lead, cysts, and other contaminants for cleaner, clearer, better tasting drinking water. - PRECISION CARBON BLOCK TECHNOLOGY - Dense 0.5-micron carbon block construction provides fine filtration that captures contaminants at a level that granular carbon filters cannot match, delivering high-quality drinking water. - NSF/ANSI 42 AND 53 CERTIFIED - Independently tested and certified to reduce lead, chlorine, cysts, VOCs, PFOA/PFOS, and other chemicals for confidence in every glass of water. - 400 GALLON CAPACITY - Designed for under-sink drinking water applications. Replace approximately every 6 months or when you notice a decrease in water flow or water quality. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002YU70M | | Best Sellers Rank | #112,137 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #698 in Replacement Under-Sink Water Filters | | Brand Name | Pentair | | Customer Reviews | 4.0 4.0 out of 5 stars (285) | | External Testing Certification | ANSI, NSF | | Global Trade Identification Number | 00047087300258 | | Included Components | Filter Cartridge | | Item Dimensions D x W x H | 2.8"D x 2.8"W x 9.8"H | | Item Type Name | 10" Under Sink Carbon Block Taste & Odor Replacement Filter Cartridge, 10" x 2.5", 0.5 Micron | | Item Weight | 16 ounces | | Manufacturer | Pentair | | Manufacturer Part Number | CB3-SS4-S18 | | Manufacturer Warranty Description | 1 Year | | Material Type | Polypropylene (PP) | | Model Number | CB3-SS | | Number of Items | 1 | | Number of Packs | 1 | | Product Benefits | Reduces Chlorine | | Set Name | OMNIFilter CBF1, CBF3, OT32, USM2 | | UPC | 047087201005 047087300258 | | Unit Count | 1 Count | ## Product Details - **External Testing Certification:** ANSI, NSF - **Item Weight:** 16 ounces - **Material:** Polypropylene (PP) - **Product Benefits:** Reduces Chlorine - **Product Dimensions:** 2.8"D x 2.8"W x 9.8"H ## Images ![Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron - Image 1](https://m.media-amazon.com/images/I/61PXr+LY9FL.jpg) ![Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron - Image 2](https://m.media-amazon.com/images/I/31BJkYXo3OL.jpg) ![Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron - Image 3](https://m.media-amazon.com/images/I/31S6lChUxJL.jpg) ![Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron - Image 4](https://m.media-amazon.com/images/I/31lmw7GASsL.jpg) ![Pentair OMNIFilter CB3 Carbon Water Filter, 10" Under Sink Carbon Block Replacement Cartridge, NSF 42/53 Certified, Reduces PFOA/PFOS, 10" x 2.5", 0.5 Micron - Image 5](https://m.media-amazon.com/images/I/41yn9W58lML.jpg) ## Frequently Bought Together - Pentair OMNIFilter CB3 Carbon Water Filter, 10" Undersink Carbon Block Taste & Odor Replacement Filter Cartridge, NSF Certified to Reduce PFOA/PFOS, 10" x 2.5", 0.5 Micron - Pentair OMNIFilter RS14 Sediment Water Filter, 10-Inch, Standard Whole House Polypropylene Spun Sediment Replacement Filter Cartridge, 10" x 2.5", 10 Micron, Pack of 2 - Captain O-Ring - K4 Replacement O-Ring Kit for OmniFilter K4, CBF1, CBF3, SFM2, U30, USM2, OT32, RO2000, RO2050, and More (2 Sets, 8 Orings) --- ## 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.us/products/2709182-pentair-omnifilter-cb3-carbon-water-filter-10-under-sink-carbon](https://www.desertcart.us/products/2709182-pentair-omnifilter-cb3-carbon-water-filter-10-under-sink-carbon) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-05*