---
product_id: 713029958
title: "iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20”"
brand: "ispring"
price: "R16070"
currency: ZAR
in_stock: true
reviews_count: 5
category: "I Spring"
url: https://www.desertcart.co.za/products/713029958-ispring-fg25b-ks-high-capacity-heavy-metal-reducing-gac-kdf
store_origin: ZA
region: South Africa
---

# Standard 4.5” x 20” fit Up to 150K gallons lifespan Heavy metal & chlorine defense iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20”

**Brand:** ispring
**Price:** R16070
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your home’s water game—pure, powerful, and built to last!

## Quick Answers

- **What is this?** iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” by ispring
- **How much does it cost?** R16070 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/713029958-ispring-fg25b-ks-high-capacity-heavy-metal-reducing-gac-kdf)

## 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

- • **Whole House Protection:** Shield your home from chlorine, lead, mercury, and more harmful chemicals with advanced GAC and KDF filtration.
- • **Universal Compatibility:** Fits all standard 4.5” x 20” whole house filter housings for seamless, no-fuss replacement.
- • **Long-Lasting Performance:** Filter up to 150,000 gallons or 10-12 months of water without compromising quality—less hassle, more peace of mind.
- • **Trusted Support & Quality:** NSF-certified, USA-made, backed by expert customer service from Atlanta to ensure your water worries are history.
- • **Mineral-Friendly Filtration:** Keeps essential healthy minerals intact while removing contaminants—because pure water shouldn’t mean stripped water.

## Overview

The iSpring FG25B-KS is a high-capacity whole house water filter cartridge measuring 4.5” x 20”, designed to reduce chlorine, heavy metals, hydrogen sulfide, pesticides, and odors while preserving healthy minerals. NSF-certified and made in the USA, it fits standard housings and filters up to 150,000 gallons or 10-12 months, offering reliable, long-lasting protection with expert customer support.

## Description

iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” : desertcart.in: Home Improvement

Review: Après avoir creusé mon puits artésien, j'ai été déçu de cette odeur présente. Le sulfure d'hydrogène à noirci mon anode en magnésium du réservoir à eau chaude. J'ai corrigé cela en remplaçant l'anode de mon chauffe-eau Rheem par une anode Corro-Stop et ça fonctionné. L'eau froide restait un problème. Quand j'ai finalement trouvé ce filtre j'ai été très sceptique mais j'avais pas envi de payer une fortune pour éliminer le problème. J'ai acheté le système à trois filtres de iSpring. Le premier pour les sédiments, le 2e pour le sulfure d'hydrogène et autres pesticide et le 3e pour la filtration au charbon. En plus d'une bonne filtration je n'ai plus aucune odeur d'oeufs pourris. Plus que satisfait. Ajout au 18 décembre 2022. L'odeur d'oeufs pourris est réapparue après 6 mois. Ça dépend de chaque puits. Après remplacement, tout est revenu comme avant, sans aucune odeur. Donc 2 filtres FG25B-KS par année dans mon cas.
Review: Filter does an excellent job with my metals and the sulfur smell. I've been using the filter for 3 yrs and had a problem for the first time this year. The iSpring team, thanks Edwin, did a great job at resolving my issue quickly. I just purchased a new strainer to accompany this filter, it's an iSpring too. They are my go to for filtration.

## Features

- [Protect Your Family and Household Appliance from Chlorine, Heavy Metal, and Other Harmful Chemicals] FG25B-KS 20” x 4.5” compound filter is designed to remove chlorine, lead, mercury, hydrogen sulfide, heavy metals, pesticides, herbicides, odors, and other contaminants.
- [Standard Size] Our filter set fits any standard whole house water filter housings that require 20” x 4.5” cartridges. Each cartridge is individually wrapped to ensure that the filter stays fresh. Please unwrap the cartridges before installation.
- [Built to Last] Your filter changing schedule will be based on the contaminantion level of your source water. We recommend changing your filters every 10-12 months or when you’ve filtered up to 150K gallons of water. Our filter cartridges are hassle-free and replacement is a breeze!
- [Peace-of-Mind Customer Service] We offer both technical assistance and customer service support by phone or email out of our headquarters in Atlanta, GA. Our knowledgeable team is available to help you find a filtration solution that best solves your specific water concerns or to help with any after-sale support you may need. Our goal is, and always will be, to maximize your user experience.
- [Please Note] Unlike an RO membrane, this filter DOES NOT reduce Total Dissolved Solids (TDS). Instead this filter keeps healthy minerals in your water while removing harmful chemicals. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08HPKCZ33 |
| Brand | iSpring |
| Country of Origin | USA |
| External Testing Certification | NSF |
| Generic Name | Whole House Water Filter Replacement Cartridge |
| Included Components | 1 whole house water filter |
| Item Dimensions LxWxH | 50.8 x 11.4 x 11.4 Centimeters |
| Item Weight | 2 kg 270 g |
| Item model number | FG25B-KS |
| Manufacturer | iSpring Water Systems |
| Material | Metal |
| Net Quantity | 1 Count |
| Number of Items | 1 |
| UPC | 810004172128 |

## Product Details

- **Brand:** iSpring
- **External Testing Certification:** NSF
- **Item Weight:** 2.27 kg
- **Material:** Metal
- **UPC:** 810004172128

## Images

![iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” - Image 1](https://m.media-amazon.com/images/I/31BnoWCYWcL.jpg)
![iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” - Image 2](https://m.media-amazon.com/images/I/5166bImVs6L.jpg)
![iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” - Image 3](https://m.media-amazon.com/images/I/518Yz0cUq1L.jpg)
![iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” - Image 4](https://m.media-amazon.com/images/I/51HMFIeyiUL.jpg)
![iSpring FG25B-KS High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge, 4.5” x 20” - Image 5](https://m.media-amazon.com/images/I/51T6nOy7cnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by T***N on 11 June 2022*

Après avoir creusé mon puits artésien, j'ai été déçu de cette odeur présente. Le sulfure d'hydrogène à noirci mon anode en magnésium du réservoir à eau chaude. J'ai corrigé cela en remplaçant l'anode de mon chauffe-eau Rheem par une anode Corro-Stop et ça fonctionné. L'eau froide restait un problème. Quand j'ai finalement trouvé ce filtre j'ai été très sceptique mais j'avais pas envi de payer une fortune pour éliminer le problème. J'ai acheté le système à trois filtres de iSpring. Le premier pour les sédiments, le 2e pour le sulfure d'hydrogène et autres pesticide et le 3e pour la filtration au charbon. En plus d'une bonne filtration je n'ai plus aucune odeur d'oeufs pourris. Plus que satisfait. Ajout au 18 décembre 2022. L'odeur d'oeufs pourris est réapparue après 6 mois. Ça dépend de chaque puits. Après remplacement, tout est revenu comme avant, sans aucune odeur. Donc 2 filtres FG25B-KS par année dans mon cas.

### ⭐⭐⭐⭐⭐ Review
*by R***O on 5 March 2025*

Filter does an excellent job with my metals and the sulfur smell. I've been using the filter for 3 yrs and had a problem for the first time this year. The iSpring team, thanks Edwin, did a great job at resolving my issue quickly. I just purchased a new strainer to accompany this filter, it's an iSpring too. They are my go to for filtration.

### ⭐⭐⭐⭐⭐ Review
*by K***M on 17 January 2024*

Excellent product. Easy to install, so as long as you preplan the pipe route. This has improved the water quality and customer service is quick to respond if I have a question that needs to be resolved, specifically JOHN. I added an additional bone char filter to eliminate fluoride for the entire house and have two come to support this brand and have recently bout two shower head mineral filters and a reverse osmosis under the sink filter. Since having this product I only had one defect which would include a broken carbon filter which was most likely broken by the delivery driver but a quick email and a replacement was sent without any hassle.

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-26*