---
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: "₨2010"
currency: SCR
in_stock: true
reviews_count: 13
category: "I Spring"
url: https://www.desertcart.sc/products/70445757-ispring-fc15b-high-capacity-activated-cto-carbon-block-filter-under
store_origin: SC
region: Seychelles
---

# 50,000 gallons filter life reversible flow design 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:** ₨2010
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water game—because your home deserves the cleanest sip!

## 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?** ₨2010 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/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

- • **Reversible Flow Design:** Easily switch filter orientation to match your plumbing setup—perfect for OCD-level precision.
- • **Universal Compatibility:** Fits standard 10"x4.5" under sink and whole house systems, including iSpring US21B and WGB21B series.
- • **Risk-Free Purchase & Support:** Backed by a 30-day money-back guarantee and lifetime tech support from iSpring’s Atlanta-based team.
- • **Long-Lasting Filtration Power:** Filters up to 50,000 gallons or 6 months of clean, refreshing water—maximizing value and convenience.
- • **Premium Activated Carbon Block:** Harnesses high-grade coconut shell carbon for superior chlorine, taste, and odor removal.

## Overview

The iSpring FC15B is a high-capacity activated CTO carbon block 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 fresh, clean water for up to 50,000 gallons or 6 months. Compatible with standard 10"x4.5" filters and iSpring systems, it features a reversible flow design for easy installation and is supported 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: Works on nasty city water, reversable flow - Using this on city water that just smells nasty in Florida and it now has no smell and tastes great. I saw some reviewers that ran their waterlines back and forth becaust the way the filter set comes, the water inlet is on the right and the outlet on the left. This did not match my plumbing and it simply hurts my OCD to have the flow be right to left or have pipes come out of the wall and criss cross to match the backwards flow setup. Well, the filters on the bracket are symetrical and reversable easily with the bolts on the top. I checked with ispring and they confirmed that is legit so all is well. The dual set I purchased is really beefy with double orings on the filter housing, a really quality setup. I have a single filter on a whole house in another location and that lasts a year before the pressure starts dropping so I'll be watching if this one is the same or worse with the two filters in series. Only issue I had was to get the NPT fittings to seal into the filter, you have to tighten so much that it digs up the plastic on the housing but eventually seals. I used a coupler on both sides in case something starts to leak and I have to remove the housing. First time using Pex-A but seems to be leak free for now. I removed the labels on the filter packaging and stuck them on th bracket to remind me which went where since I reversed them from the way they shipped. A decent setup with quick reply from customer service for me...
Review: Top Notch Whole House Water Filtration System - Just had this affordable system installed last week and the results were almost instantaneous. We are using the sediment and charcoal filters, and our water went to almost undrinkable to perfect within a day. The system itself is heavy and well built, and took about an hour for a professional plumber to install. Replacement filters are reasonable and simple to swap using the included wrench.

## 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 | #3,432 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Whole House Water Treatment Systems |
| Brand | iSpring |
| Brand Name | iSpring |
| Capacity | 50000 gallons |
| Customer Reviews | 4.7 out of 5 stars 4,287 Reviews |
| Filter Life Cycle | 6 months |
| Global Trade Identification Number | 00662425080212 |
| Included Components | 1 FC15B CTO Filter |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 10"L x 10"W x 10"H |
| Item Type Name | for Under Sink and Whole House Water Filtration System |
| Item Weight | 2.7 pounds |
| Manufacturer | iSpring Water Systems |
| Material | Carbon Block |
| 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 |
| Part Number | FC15B |
| Power Source | Electric Power |
| Product Dimensions | 10"L x 10"W x 10"H |
| Purification Method | Activated Carbon, Carbon Block |
| Special Feature | UV Light Disinfection |
| UPC | 662425080212 |
| Unit Count | 1 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
- **Power Source:** Electric Power
- **Product Dimensions:** 10"L x 10"W x 10"H
- **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)
![iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" - Image 2](https://m.media-amazon.com/images/I/71cWvZqN9tL.jpg)
![iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" - Image 3](https://m.media-amazon.com/images/I/31lo784o3kL.jpg)
![iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" - Image 4](https://m.media-amazon.com/images/I/71gRxnw5S6L.jpg)
![iSpring FC15B High Capacity Activated CTO Carbon Block Filter for Under Sink and Whole House Water Filtration System, 5-Micron 10"x4.5" - Image 5](https://m.media-amazon.com/images/I/71StEr+ktVL.jpg)

## Available Options

This product comes in different **Set** 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

### ⭐⭐⭐⭐⭐ Works on nasty city water, reversable flow
*by G***R on April 9, 2026*

Using this on city water that just smells nasty in Florida and it now has no smell and tastes great. I saw some reviewers that ran their waterlines back and forth becaust the way the filter set comes, the water inlet is on the right and the outlet on the left. This did not match my plumbing and it simply hurts my OCD to have the flow be right to left or have pipes come out of the wall and criss cross to match the backwards flow setup. Well, the filters on the bracket are symetrical and reversable easily with the bolts on the top. I checked with ispring and they confirmed that is legit so all is well. The dual set I purchased is really beefy with double orings on the filter housing, a really quality setup. I have a single filter on a whole house in another location and that lasts a year before the pressure starts dropping so I'll be watching if this one is the same or worse with the two filters in series. Only issue I had was to get the NPT fittings to seal into the filter, you have to tighten so much that it digs up the plastic on the housing but eventually seals. I used a coupler on both sides in case something starts to leak and I have to remove the housing. First time using Pex-A but seems to be leak free for now. I removed the labels on the filter packaging and stuck them on th bracket to remind me which went where since I reversed them from the way they shipped. A decent setup with quick reply from customer service for me...

### ⭐⭐⭐⭐⭐ Top Notch Whole House Water Filtration System
*by M***G on March 30, 2026*

Just had this affordable system installed last week and the results were almost instantaneous. We are using the sediment and charcoal filters, and our water went to almost undrinkable to perfect within a day. The system itself is heavy and well built, and took about an hour for a professional plumber to install. Replacement filters are reasonable and simple to swap using the included wrench.

### ⭐⭐⭐⭐⭐ Good quality products and great tech support
*by V***T on June 16, 2026*

I have been using the Ispring UVF55FS 55W whole-house UV water system in my off-grid cabin for about 5 years, and it has worked wonderfully. I even had the water tested to make sure it's safe to drink, and it all tested normal. The cartridges are reasonably priced and easy to replace as needed. Whenever I have a problem, I call, and Nick has been so patient and helpful in resolving the problem. I don't know what I would have done without the system and Nick's continued help.

## 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 Seychelles*
*Store origin: SC*
*Last updated: 2026-08-10*