--- product_id: 70445757 title: "iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10\"x4.5\"" brand: "ispring" price: "€ 75.14" currency: EUR in_stock: true reviews_count: 13 category: "I Spring" url: https://www.desertcart.hr/products/70445757-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-under store_origin: HR region: Croatia --- # 50,000 gallons filter life Fits standard 10" x 4.5" systems 99% chlorine removal iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" **Brand:** ispring **Price:** € 75.14 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your water game—pure, fresh, and worry-free hydration at every faucet! ## Quick Answers - **What is this?** iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" by ispring - **How much does it cost?** € 75.14 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/70445757-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-under) ## Best For - ispring enthusiasts ## Why This Product - Trusted ispring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Risk-Free Confidence:** Backed by a 30-day money-back guarantee and lifetime tech support from iSpring’s experts. - • **Seamless Compatibility:** Official replacement for iSpring US21B and whole house systems, plus fits most standard 10" x 4.5" filters. - • **Long-Lasting Performance:** Filters up to 50,000 gallons or 6 months, ensuring consistent clean water flow throughout your home. - • **Premium Activated Carbon Block:** Harnesses high-quality coconut shell carbon for superior filtration without chemical binders. - • **Ultra-Effective Contaminant Removal:** Eliminates chlorine, odors, tastes, herbicides, solvents, and trihalomethanes with 99% efficiency. ## Overview The iSpring FC15B is a premium activated carbon block CTO filter designed for under-sink and whole house water filtration systems. It removes up to 99% of chlorine, bad tastes, odors, and harmful organic compounds, delivering clean, refreshing water. With a robust 50,000-gallon capacity and compatibility with standard 10" x 4.5" filters, it offers long-lasting, reliable performance backed by a 30-day money-back guarantee and lifetime tech support. ## Description Used as the second stage for iSpring Direct Connect under sink water filter system US21B and iSpring whole house filtration system WGB21B or the first stage of iSpring whole house filtration systems WGB21BM and WGB21B-PB. The carbon block filter consists of high-quality activated carbon. It is effective in reducing free chlorine, bad taste, odor, THM, organics, hazardous chemicals, and more. Depending on source water quality or flow rate, it needs to be replaced every 6 months or about 50, 000 gallons of water. Each filter is individually sealed to keep freshness. Fits models using standard 10" x 4.5" water filters. Review: These clean your water very well - These filters are very good products. I’ve used them for years and will continue using. Review: Reliable, Perfect Fit, and Worth the Price - Yes, it costs a bit more than the knock-offs—but after trying those, I’m done experimenting. The iSpring FC15B fits every time, no forcing, no leaks, no “is this seated correctly?” stress. That alone makes it worth the extra cost. Water quality is consistently great, and the carbon block does exactly what it’s supposed to do—noticeably better taste and odor reduction right away. It works flawlessly in my under-sink system and gives the peace of mind you want when it’s part of your whole-house setup. I’ve learned the hard way that saving a few dollars on off-brand filters usually leads to frustration or replacements. This one just works, installs cleanly, and performs as advertised. Sometimes paying a little more is actually the cheaper option. Highly recommend. ## Features - [Premium Quality Material] Using high-quality coconut shell carbon and highly compact fabrication tech, this highly activated carbon block CTO(Chlorine, Taste, and Odor) filter cartridge is designed and produced to achieve maximum filtration efficiency and filter life for 10" Under Sink Water Filter and Whole House Water Filtration Systems. Free of surfactants, binders, and adhesives. No leaching carbon ash - [Exceptional Filtration Performance] Knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is highly effective on Organic Compounds like herbicides, and industrial solvents and other contaminants like trihalomethanes. Steady flow and high absorption - [Long Filter Life] Filters up to 50,000 gallons depending on the use and feed water quality. Replace the filter every 6 months or every 50,000 gallons of water for optimal performance. Usually used as the second stage filter for whole house water filtration systems, FC15B brings clean and refreshing water to every faucet in your home - [Great Compatibility] Official replacement filter for iSpring Under Sink Water Filter System US21B and Whole House water filtration systems(WGB21B, WGB21BM, and WGB21B-PB). Fits other standard 10" x 4.5" undersink and whole house water filtration systems. Individually sealed for freshness - [Peace-of-mind Customer Support] Your risk-free shopping experience is backed by a 30-day money-back guarantee and lifetime tech support from iSpring in Alpharetta, GA ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01M0DVV2B | | Best Sellers Rank | #3,256 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Whole House Water Treatment Systems | | Brand Name | iSpring | | Capacity | 50000 Gallons | | Customer Reviews | 4.7 4.7 out of 5 stars (1,151) | | Global Trade Identification Number | 00662425080212 | | Included Components | 1 FC15B CTO Filter | | Installation Type | Under Sink | | Item Type Name | for Under Sink and Whole House Water Filtration System | | Item Weight | 2.7 Pounds | | Manufacturer | iSpring Water Systems | | Material Type | Carbon Block | | Model Name | FC15B High Capacity Activated CTO Carbon Block Water Filter | | Model Number | 1 | | Other Special Features of the Product | UV Light Disinfection | | Power Source | Electric Power | | Purification Method | Activated Carbon, Carbon Block | | UPC | 662425080212 | | Unit Count | 1.0 Count | | Warranty Description | Your risk-free shopping experience is backed by a 30-day money-back guarantee and lifetime tech support from iSpring in Atlanta, GA. | ## Product Details - **Brand:** iSpring - **Capacity:** 50000 Gallons - **Included Components:** 1 FC15B CTO Filter - **Installation Type:** Under Sink - **Item Weight:** 2.7 Pounds - **Material:** Carbon Block - **Model Name:** FC15B High Capacity Activated CTO Carbon Block Water Filter - **Power Source:** Electric Power - **Purification Method:** Activated Carbon, Carbon Block - **Special Feature:** UV Light Disinfection ## Images ![iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" - Image 1](https://m.media-amazon.com/images/I/51pZt-gNNAL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Using ispring dual stage set up. would 2 of these filters work best to remove chlorine from municipal water? the water is clean but chemical laden.** A: Thanks for your interest in the iSpring whole-house water filter. Knocks out cloudiness as well as bad tastes and odors remove up to 99% of chlorine, and is effective on herbicides and industrial solvents, and other contaminants like trihalomethanes. Steady flow and high absorption. Filters up to 50,000 gallons depending on the use and feed water quality. Replace the filter every 6 months or every 50,000 gallons of water for ideal performance, depending on the quality of source water and daily water consumption. If you have other questions, please call us at 678-261-7611 (M-F, 8:30 - 5:30 EST), text us at 470-560-0012 (M-F, 8:30 - 5:30 EST), or email us at support@123filter.com. We are happy to help. **Q: Do you have to rinse/flush the carbon filter before installing it in the whole house system? If yes, what’s the way to do so? Thank you** A: Hi TC, You can flush the filter after installation. Just open the nearest tap and let it run until the water is clear or when all the carbon residue is out. Please reach out to our customer service team for additional questions. We're always ready to help. iSpring Water Systems, LLC **Q: How Big Is It?** A: Thank you for your question! The size of the filter is 4.5 inch (diameter) x 10 inch (length). Best, iSpring Water Systems LLC **Q: is there a catalyitic carbon filter avaiable to remove chloramines?** A: Chloramine is removed from water with essentially the same strategies that are used to remove chlorine. This means that carbon filtration is the best removal method and filter carbon does indeed remove chloramine. The problem is that it takes more carbon and more contact time to do the job. In practical terms this means that if your City disinfects your tap water with chloramines you'll need to get a larger and better carbon filter than you would need if chlorine alone were used. All our products use activated carbon so are capable of removing chloramine. ## Customer Reviews ### ⭐⭐⭐⭐⭐ These clean your water very well *by D***L on July 25, 2024* These filters are very good products. I’ve used them for years and will continue using. ### ⭐⭐⭐⭐⭐ Reliable, Perfect Fit, and Worth the Price *by J***. on January 1, 2026* Yes, it costs a bit more than the knock-offs—but after trying those, I’m done experimenting. The iSpring FC15B fits every time, no forcing, no leaks, no “is this seated correctly?” stress. That alone makes it worth the extra cost. Water quality is consistently great, and the carbon block does exactly what it’s supposed to do—noticeably better taste and odor reduction right away. It works flawlessly in my under-sink system and gives the peace of mind you want when it’s part of your whole-house setup. I’ve learned the hard way that saving a few dollars on off-brand filters usually leads to frustration or replacements. This one just works, installs cleanly, and performs as advertised. Sometimes paying a little more is actually the cheaper option. Highly recommend. ### ⭐⭐⭐⭐ Whole house water filter *by K***R on June 28, 2025* So far so good, easy installation. May have to replace sooner than later due to water quality ## Frequently Bought Together - iSpring FC15B High Capacity Activated CTO Carbon Block Filter Replacement Cartridge for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" - iSpring FP15B Sediment Filter Replacement Cartridge for Whole House Water Filtration Systems, High Capacity 5-Micron Premium PP, 4.5" x 10", White - iSpring WGB21B 2-Stage Whole House Water Filtration System, with 10" x 4.5" Sediment CTO(Chlorine, Taste, and Odor) Filter, 1" Inlet/Outlet --- ## 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.hr/products/70445757-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-under](https://www.desertcart.hr/products/70445757-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-under) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-21*