---
product_id: 567410738
title: "iSpring FC25BX4 High Capacity 4.5\" x 20\" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White"
brand: "ispring"
price: "$908"
currency: NZD
in_stock: true
reviews_count: 5
category: "I Spring"
url: https://www.desertcart.nz/products/567410738-ispring-fc25bx4-high-capacity-4-5-x-20-whole-house
store_origin: NZ
region: New Zealand
---

# Premium coconut shell activated carbon 99% chlorine removal Fits standard 20" x 4.5" housings iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White

**Brand:** ispring
**Price:** $908
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your home’s water game — because your family deserves nothing less!

## Quick Answers

- **What is this?** iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White by ispring
- **How much does it cost?** $908 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/567410738-ispring-fc25bx4-high-capacity-4-5-x-20-whole-house)

## 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

- • **Flow Without Compromise:** Maintains strong water flow up to 15 GPM, so your daily routine never slows down.
- • **Nature-Powered Filtration:** High-quality coconut shell carbon maximizes adsorption for superior taste and odor elimination.
- • **Support That Has Your Back:** Lifetime free tech support and warranty registration for peace of mind and hassle-free maintenance.
- • **Pure Water, Pure Confidence:** Removes up to 99% of chlorine & contaminants for fresh, clean water throughout your home.
- • **Seamless Fit, Effortless Upgrade:** Standard 20" x 4.5" size ensures easy installation and compatibility with most whole house systems.

## Overview

The iSpring FC25BX4 is a high-capacity whole house water filter cartridge designed to fit standard 20" x 4.5" housings. Utilizing premium coconut shell activated carbon, it effectively removes up to 99% of chlorine, organic compounds, and odors without stripping essential minerals. With a flow rate up to 15 GPM and NSF/ANSI certification, it offers reliable, long-lasting filtration backed by lifetime U.S.-based customer support.

## Description

Usually used as the second stage for 20 in. whole house filters. The carbon block filter is manufactured using a continuous extrusion process. It consists of a high quality virgin premium performance Activated Carbon. It is effective in reducing free chlorine, bad taste, odor THM, Organics, hazardous chemicals, and pesticides. Depending on the inlet water quality or flow rate, it needs to be replaced every 6 months or 100,000 Gal. of water.

Review: This was my second purchase from Ispring. I have the 50micron spin down filter and the whole house filter system installed on my well water. The water is now clean and clear and does not have anymore metallic smell. The I like this system because it leaves the minerals in my water while removing what I want removed. It was also very easy to install. I am a plumber, but it would be easy enough for any DIYer. I needed an extra part for the system and Sean sent one to me promptly. Their customer service is great.
Review: Let me just start out by saying I pride myself in being a DIY homeowner. My fiancée and I moved down to Southwest Florida in 2022 and have been struggling with our well water until I found this water filtration system. The water companies down here are gouging people anywhere between $5k and $10k for clean drinking water systems. I needed a solution to our incredibly intense sulfur smell and heavy sand/sediment buildup since we are so close to the water table down here. As you can see from my photos our water softener is designed to be outside since it never gets below freezing down here. Before I installed this whole home water filtration system by iSpring, I called and talked with them about any potential issues I may run into having their system installed outdoors. I was the year round Florida heat would be fine, but the intense solar energy from the sun could compromise the blue filter housing potentially allowing plastic to leach into our water supply. I went ahead and installed the whole filter with all the plumbing in a plastic resin container from Home Depot. I also preemptively installed a few bypass water valves behind the water filtration container in line with the house supply line incase of any future maintenance needed to be done, we could still draw water from our softener directly. I installed my system in June of 2024 and this iSpring system solved ALL of my problems! The sulfur smell was totally gone and we stopped seeing sand/sediment in our bathtub whenever we wanted to draw up a bath. I would also like to note, their system has had 0 leaks and is water tight. October 2024 Update: It has been 4 months and we are now starting to get that sulfur smell back into our water coming in the house. After calling iSpring and speaking with Michele, she informed me to get in touch with our local cooperative extension office to get a water test and bacteria test performed on our well water. Michele also graciously reassured me that our 50-micron spin down sediment filter wasn’t enough for our well system and that we needed a 100-micron filter. Michele has been incredibly informative as well as helpful in helping us get our water issues resolved. My overall takeaway with iSpring is I would give them a 10/10 and I highly recommend iSpring to anyone looking to get filtered water for their home! Customer service has been above excellent, the price for their products are very reasonable, the overall design of their system is minimal/not over complicated, and the ease of installation was a breeze!

## Features

- Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block filter is specially designed to remove up to 99% of chlorine from water as well as various natural organic compounds, taste and odor compounds, and synthetic organic chemicals.
- Standard Size: Our filter set fits standard 20” x 4.5” housings,
- Top-Notch Quality: Our FC25B CTO Carbon Block filters are made of high-quality coconut shell activated carbon for maximum filtration efficiency and filter life. Activated carbon is an effective adsorbent because it is a highly porous material and provides a large surface area to which contaminants may adsorb. They are tested by an independent third-party to meet NSF/ANSI standards. The 20” x 4.5” filter cartridges have a minimum impact on water flow (up to 15 GPM) and require minimum maintenance
- Peace of Mind Customer Service: Register online to activate your manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
- Please Note: The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use. Unlike an RO membrane, the filters don’t reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007TB4W8E |
| Brand | iSpring |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,869) |
| Date First Available | 1 March 2021 |
| Item Weight | 13.4 Kilograms |
| Material | Polypropylene CTO Carbon Block Activated Carbon |
| Model Number | FC25BX4 |
| Product Dimensions | 12.7 x 12.7 x 50.8 cm; 13.4 kg |

## Product Details

- **Brand:** iSpring
- **Item weight:** 29.55 Pounds
- **Material:** Polypropylene CTO Carbon Block Activated Carbon
- **Product benefits:** Protects your family and household appliance from chlorine and other contaminants
- **Product dimensions:** 11.4D x 11.4W x 50.8H centimeters

## Images

![iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White - Image 1](https://m.media-amazon.com/images/I/61IkDitdqRL.jpg)
![iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White - Image 2](https://m.media-amazon.com/images/I/61UPtOWDd5L.jpg)
![iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White - Image 3](https://m.media-amazon.com/images/I/81+lI38QYuS.jpg)
![iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White - Image 4](https://m.media-amazon.com/images/I/81PGKY30RtL.jpg)
![iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White - Image 5](https://m.media-amazon.com/images/I/91SG0ADdtdL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by F***X on 19 December 2022*

This was my second purchase from Ispring. I have the 50micron spin down filter and the whole house filter system installed on my well water. The water is now clean and clear and does not have anymore metallic smell. The I like this system because it leaves the minerals in my water while removing what I want removed. It was also very easy to install. I am a plumber, but it would be easy enough for any DIYer. I needed an extra part for the system and Sean sent one to me promptly. Their customer service is great.

### ⭐⭐⭐⭐⭐ Review
*by A***Z on 16 October 2024*

Let me just start out by saying I pride myself in being a DIY homeowner. My fiancée and I moved down to Southwest Florida in 2022 and have been struggling with our well water until I found this water filtration system. The water companies down here are gouging people anywhere between $5k and $10k for clean drinking water systems. I needed a solution to our incredibly intense sulfur smell and heavy sand/sediment buildup since we are so close to the water table down here. As you can see from my photos our water softener is designed to be outside since it never gets below freezing down here. Before I installed this whole home water filtration system by iSpring, I called and talked with them about any potential issues I may run into having their system installed outdoors. I was the year round Florida heat would be fine, but the intense solar energy from the sun could compromise the blue filter housing potentially allowing plastic to leach into our water supply. I went ahead and installed the whole filter with all the plumbing in a plastic resin container from Home Depot. I also preemptively installed a few bypass water valves behind the water filtration container in line with the house supply line incase of any future maintenance needed to be done, we could still draw water from our softener directly. I installed my system in June of 2024 and this iSpring system solved ALL of my problems! The sulfur smell was totally gone and we stopped seeing sand/sediment in our bathtub whenever we wanted to draw up a bath. I would also like to note, their system has had 0 leaks and is water tight. October 2024 Update: It has been 4 months and we are now starting to get that sulfur smell back into our water coming in the house. After calling iSpring and speaking with Michele, she informed me to get in touch with our local cooperative extension office to get a water test and bacteria test performed on our well water. Michele also graciously reassured me that our 50-micron spin down sediment filter wasn’t enough for our well system and that we needed a 100-micron filter. Michele has been incredibly informative as well as helpful in helping us get our water issues resolved. My overall takeaway with iSpring is I would give them a 10/10 and I highly recommend iSpring to anyone looking to get filtered water for their home! Customer service has been above excellent, the price for their products are very reasonable, the overall design of their system is minimal/not over complicated, and the ease of installation was a breeze!

### ⭐⭐⭐⭐⭐ Review
*by M***C on 5 November 2024*

I purchased this product to correct a few issues with my well's working - sediment and Iron Manganese and taste. It has been two days since the system was operational, and my water is great - major improvements. Before I purchased the product, I called Ispring and sent my well analysis, and Sean helped me select the right product. He was Great! During the installation (which is easy), I called Ispring to clarify a topic, and Nic provided me with the answer I was looking for. Great guy and knowledgable.

## Frequently Bought Together

- iSpring FC25BX4 High Capacity 4.5" x 20" Whole House Water Filter CTO Carbon Block, 4 Count (Pack of 1), White
- iSpring 5-Micron 20” x 4.5” Whole House Water Filter Cartridges, High Capacity Sediment Filter, Model Number: FP25BX2
- Captain O-Ring – Replacement ORBX2 O-Rings for iSpring WGB22B, WGB32B Series Whole House Water Filter (4 Pack)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-26*