---
product_id: 164799171
title: "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\""
brand: "ispring"
price: "€ 100.33"
currency: EUR
in_stock: true
reviews_count: 7
category: "I Spring"
url: https://www.desertcart.nl/products/164799171-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-replacement
store_origin: NL
region: Netherlands
---

# Premium coconut shell carbon Filters up to 50,000 gallons 5-micron precision filtration 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"

**Brand:** ispring
**Price:** € 100.33
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water game with crystal-clear confidence!

## Quick Answers

- **What is this?** 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" by ispring
- **How much does it cost?** € 100.33 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/164799171-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-replacement)

## 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

- • **Eco-Friendly & Safe:** Crafted without binders or adhesives—no carbon ash leaching, just pure filtration power.
- • **Seamless Compatibility:** Fits iSpring US21B and whole house systems plus standard 10"x4.5" filters for effortless upgrades.
- • **Pure Refreshment, Every Drop:** Removes up to 99% chlorine, odors, and harmful organics for crisp, clean water.
- • **Confidence in Every Cartridge:** Backed by a 30-day money-back guarantee and lifetime tech support from iSpring experts.
- • **Built to Last, Filter After Filter:** High-capacity design filters up to 50,000 gallons or 6 months of use—less hassle, more hydration.

## Overview

The iSpring FC15B is a premium activated CTO carbon block filter cartridge designed for under sink and whole house water filtration systems. Utilizing high-quality coconut shell carbon and advanced fabrication, it delivers 5-micron filtration that removes up to 99% of chlorine, odors, and harmful organic compounds. With a long lifespan filtering up to 50,000 gallons or 6 months, it ensures steady flow and superior water quality. Compatible with iSpring US21B and whole house systems as well as standard 10"x4.5" filters, it comes individually sealed for freshness and is supported by a 30-day money-back guarantee and lifetime technical 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: Value for money - Brilliant value for money, good all round filter
Review: Ok. But not as good as others - Not as good as previous carbon filters of other grands I have used

## 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 | 242,777 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 367 in Water Filter Cartridges |
| Brand | iSpring |
| Colour | 5-Micron 10"x4.5" |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,169) |
| Date First Available | 6 Oct. 2016 |
| Item Weight | 1.22 kg |
| Model Number | FC15B |
| Product Dimensions | 11.43 x 11.43 x 25.4 cm; 1.22 kg |
| Special Features | UV Light Disinfection |

## Product Details

- **Brand:** iSpring
- **Capacity:** 50000 gallons
- **Included components:** 1 FC15B CTO Filter
- **Installation type:** Under Sink
- **Item weight:** 1.23 kg
- **Material:** Activated carbon
- **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 Replacement Cartridge 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 **Style** 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

### ⭐⭐⭐⭐⭐ Value for money
*by A***R on 7 August 2025*

Brilliant value for money, good all round filter

### ⭐⭐⭐ Ok. But not as good as others
*by R***T on 20 October 2025*

Not as good as previous carbon filters of other grands I have used

### ⭐⭐⭐⭐ Review
*by A***M on 21 January 2024*

La única crítica que tengo, es que es caro. Deberían haber paquetes que permitan abaratar sustancialmente el producto.

## 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

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-05*