---
product_id: 298653079
title: "iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5\" x 20\""
brand: "ispring"
price: "1681 Lei"
currency: RON
in_stock: false
reviews_count: 5
category: "I Spring"
url: https://www.desertcart.ro/products/298653079-ispring-fc25b-nsf-certified-high-capacity-big-blue-whole-house
store_origin: RO
region: Romania
---

# up to 15 GPM flow rate premium coconut shell carbon 99% chlorine removal iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20"

**Brand:** ispring
**Price:** 1681 Lei
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20" by ispring
- **How much does it cost?** 1681 Lei with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/298653079-ispring-fc25b-nsf-certified-high-capacity-big-blue-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

- • **Effortless Flow:** Maintains a strong water flow of up to 15 gallons per minute with minimal impact on pressure.
- • **Certified Reliability:** NSF/ANSI tested and certified to ensure trusted, consistent water quality you can count on.
- • **Premium Filtration Power:** Crafted from high-quality coconut shell activated carbon for superior contaminant adsorption and long filter life.
- • **Pure Water, Pure Confidence:** Removes up to 99% of chlorine, odors, and chemicals for fresh, clean water throughout your home.
- • **Lifetime Support, Local Service:** Register for lifetime free tech support from a dedicated U.S.-based team—peace of mind included.

## Overview

The iSpring FC25B is a high-capacity 20" x 4.5" whole house carbon block water filter that removes up to 99% of chlorine, odors, and chemicals using premium coconut shell activated carbon. It supports a strong flow rate of up to 15 GPM, fits standard housings, and is NSF/ANSI certified for quality assurance. Designed to preserve healthy minerals, it comes with lifetime U.S.-based tech support, making it an ideal choice for health-conscious households seeking reliable, great-tasting water.

## Description

Enjoy cleaner, better-tasting water throughout your home with the iSpring FC25B Whole House Carbon Block Filter. Specially designed to reduce up to 99% of chlorine, odors, cloudiness, and chemicals, this high-performance 20" x 4.5" filter uses premium coconut shell activated carbon for maximum efficiency and long-lasting filtration. Compatible with standard whole-house filter housings, it maintains strong water flow—up to 15 GPM—with minimal maintenance. Tested to meet NSF/ANSI standards, the FC25B delivers reliable performance you can trust. Backed by lifetime tech support from our U.S.-based team, it’s the perfect solution for families seeking healthier water without removing beneficial minerals.

Review: Buena calidad, algo caro pero adecuado para filtrar el agua de toda la casa
Review: Arrived in good condition

## Features

- Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block water filter is specially designed to remove up to 99% of chlorine from water as well as taste and odor compounds, cloudiness, and chemicals.
- Standard Size: Our FC25B whole house water filter fits standard housings that requires 20” x 4.5” water filter cartridges, including brand name models. The 20” x 4. 5” water filter cartridge has a minimum impact on water flow (up to 15 GPM) and require minimum maintenance
- 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. This whole house water filter is tested by an independent third-party to meet NSF/ANSI standards.
- Peace of Mind Customer Service: Register online to activate your manufacturer 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 water filters please reach out to us immediately. We are happy to help!
- Please Note: The water filter 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 | B01M1197LW |
| Best Sellers Rank | #2,503,362 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #15,131 in Water Purifier Accessories |
| Brand | iSpring |
| Generic Name | Whole House CTO Carbon Block |
| Global Trade Identification Number | 00662425080250 |
| Included Components | 1 Whole House CTO Carbon Block |
| Installation Type | Whole House Water Tank |
| Item Weight | 2 kg 360 g |
| Item model number | 1 |
| Manufacturer | iSpring Water Systems |
| Maximum Flow Rate | 5 Gallons Per Minute |
| Model Name | High Capacity 20” x 4.5” Water Filter |
| Net Quantity | 1.0 Count |
| Power Source | Ac |
| Product Dimensions | 15.2L x 15.2W x 55.9H Centimeters |
| Special Feature | Chlorine Reduction, NSF certified |
| UPC | 662425080250 |
| Upper Temperature Rating | 125 Degrees Fahrenheit |

## Product Details

- **Brand:** iSpring
- **Capacity:** 15 Gallons per Minute
- **Material:** Carbon Block
- **Product Dimensions:** 15.2L x 15.2W x 55.9H Centimeters
- **Special Feature:** Chlorine Reduction, NSF certified

## Images

![iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20" - Image 1](https://m.media-amazon.com/images/I/31sKxa0W2GL.jpg)
![iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20" - Image 2](https://m.media-amazon.com/images/I/41Xw5GhTj5L.jpg)
![iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20" - Image 3](https://m.media-amazon.com/images/I/51+brOuW4dL.jpg)
![iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20" - Image 4](https://m.media-amazon.com/images/I/518Yz0cUq1L.jpg)
![iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20" - Image 5](https://m.media-amazon.com/images/I/51DczTiPQfL.jpg)

## Questions & Answers

**Q: We are looking to install this in a seasonal cabin, can this be winterized?**
A: Hi Cate,

This unit should be protected from direct sunlight or freezing temperature.  Depending on the environment in the winter, the housings might become damaged. Please contact us with more details so we can better assist you.

iSpring Water Systems
678-261-7611 support@ispringfilter.com

**Q: I received this whole house filter and one of the cartridges is broken model fc25b. can i get a replacement of this broken cartridge?**
A: allfilters.com 
I used iSpring for a while and then the types of filters ordered was so confusing......and its all made in China.......unlike advertised. So I switched to allfilters....now keep in mind that they don’t send one at a time....but the price difference, the nonconfusion, sent by USPS and customer support won me over. ALL MADE IN THE USA! Allfilters also sells the canisters. When ordering filters go by the size ei: 4 1/2” x 20”

**Q: Do you still need a water softener with this if hardness is 250 ppm?**
A: Hi there, It's optional but would help p[rolong the life of the filters if you install one. We usually recommend a water softener with TDS higher than 700 PPM. Please let us know if you have other concerns. Stay safe!

iSpring Water Systems, LLC

**Q: What pressure gauge is recommended to install pre and post filter that will work with 3/4" PEX supply line?**
A: I use the one on a spin down pre filter and a 
3/4” shark bite with gauge post filter

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***N on 11 September 2025*

Buena calidad, algo caro pero adecuado para filtrar el agua de toda la casa

### ⭐⭐⭐⭐⭐ Review
*by E***4 on 21 June 2025*

Arrived in good condition

### ⭐⭐⭐⭐⭐ Review
*by M***I on 20 September 2019*

As advertised

## Frequently Bought Together

- iSpring FC25B NSF Certified High Capacity Big Blue Whole House Water Filter CTO Carbon Block, 4.5" x 20"
- iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-31*