---
product_id: 298653073
title: "iSpring FM25B 4.5\" x 20\" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter"
brand: "ispring"
price: "AR$1042517"
currency: ARS
in_stock: false
reviews_count: 5
category: "I Spring"
url: https://www.desertcart.com.ar/products/298653073-ispring-fm25b-4-5-x-20-big-blue-high-capacity
store_origin: AR
region: Argentina
---

# Reduces iron from 30 to 0.001 ppm High flow rate 4-8 GPM with minimal pressure drop Operates efficiently across pH 5.8-8.6 & 40-113°F iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter

**Brand:** ispring
**Price:** AR$1042517
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your water game—because your health deserves the best!

## Quick Answers

- **What is this?** iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter by ispring
- **How much does it cost?** AR$1042517 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/298653073-ispring-fm25b-4-5-x-20-big-blue-high-capacity)

## 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

- • **Built to Last:** Outperforms greensand filters with up to 3x longer lifespan—less hassle, more refreshment.
- • **Powerful Flow:** High linear velocity media delivers strong flow rates with barely any pressure loss—perfect for busy households.
- • **Certified Safe:** Independently tested to NSF/ANSI standards, ensuring your drinking water is always safe and clean.
- • **Seamless Performance:** Wide pH and temperature tolerance means consistent, reliable filtration no matter your water source.
- • **Ultra-Pure Hydration:** Drastically slashes iron & manganese levels for crystal-clear water.

## Overview

The iSpring FM25B is a high-capacity 4.5" x 20" replacement water filter designed to dramatically reduce iron and manganese levels down to near zero. Engineered with catalytic media that lasts up to three times longer than traditional greensand, it supports a wide pH range (5.8-8.6) and temperatures from 40 to 113°F. Delivering flow rates between 4-8 gallons per minute with minimal pressure drop, this NSF/ANSI-certified filter ensures safe, clean drinking water with reliable, long-lasting performance.

## Description

Specs: Dimensions: length = 20", O. D. = 4. 5", I. D. = 1 1/8 inch Feed water temperature: 40 - 113 F. Feed water pressure: 20 - 100 psi Pressure impact: up to 5 psi drop at a flow rate of 8 gpm Flow rate: 4 - 8 gpm Filter life: 45, 000 gallons at 3. 0 ppm iron level Why iSpring water systems? Located in Alpharetta, Georgia for over a decade, iSpring water systems LLC is a family owned company specializing in reverse osmosis water filtration systems. Our products include residential and commercial reverse osmosis (ro) systems, whole house water systems, Ultrafiltration systems, shower, faucet, and counter top filters, filter cartridges and housings, ro coolers, and kitchen faucets and fittings. Our aim is to make high quality drinking water accessible for all households. With affordable pricing, solid quality, Prompt delivery, and top notch customer service, we hope to assist in bringing you great water for years to come.

Review: Does the job and way cheaper than Buying at a retail store.
Review: Danke werde wieder bestellen

## Features

- Efficiently reduces iron (30 -> 001 ppm), manganese (10 -> 001 ppm)
- Stable and satisfactory performance at wider ph range 58 - 86 and temperature range 40 - 113F
- Higher linear velocities than conventional media delivers high flow rates and very low pressure drop
- Lasts up to 3 times longer than greensand because the catalytic media is not consumed in the process
- Safe for Drinking water applications, tested by independent third-party to meet NSF/ANSI standard

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01A05Q3MI |
| Are batteries included? | No |
| Best Sellers Rank | #314,184 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #2,356 in Water Purifier Accessories |
| Brand | iSpring |
| Colour | White |
| Compatible Water Purifier Models | iSpring WGB22BM |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,007) |
| Date First Available | 3 September 2016 |
| External Testing Certification | ANSI |
| Generic Name | Iron Manganese Reducing High Capacity Replacement Water Filter 4.5" x 20" |
| Global Trade Identification Number | 00662425080076 |
| Included Components | 1 FM25B filter |
| Item Weight | 3 kg 630 g |
| Item model number | 1 |
| Manufacture Year | 2024 |
| Manufacturer | iSpring |
| Material | Iron |
| Model number | 1 |
| Net Quantity | 1 Count |
| Number of Items | 1 |
| Power Source | ac |
| Product Benefits | Reduces Iron |
| Product Dimensions | 15.2D x 55.9W x 15.2H Centimeters |
| Special Feature | Multi Stage Filtration, Iron & Manganese Reducing |
| UPC | 662425080076 |

## Product Details

- **External Testing Certification:** ANSI
- **Item Weight:** 8 Pounds
- **Material:** Iron
- **Product Benefits:** Reduces Iron
- **Product Dimensions:** 15.2D x 55.9W x 15.2H Centimeters

## Images

![iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter - Image 1](https://m.media-amazon.com/images/I/311hTKFp4SL.jpg)
![iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter - Image 2](https://m.media-amazon.com/images/I/51-hRqU8k+L.jpg)
![iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter - Image 3](https://m.media-amazon.com/images/I/515onGpmB1L.jpg)
![iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter - Image 4](https://m.media-amazon.com/images/I/517wXT3cMYL.jpg)
![iSpring FM25B 4.5" x 20" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter - Image 5](https://m.media-amazon.com/images/I/518Yz0cUq1L.jpg)

## Available Options

This product comes in different **Model** options.

## 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 E***T on 1 December 2020*

Does the job and way cheaper than Buying at a retail store.

### ⭐⭐⭐⭐⭐ Review
*by A***S on 26 July 2025*

Danke werde wieder bestellen

### ⭐⭐⭐⭐⭐ Review
*by W***I on 6 January 2026*

I couldn't be happier with my experience with iSpring Filters. The product itself is excellent -high quality, well-built, and performs exactly as advertised. What really stood out, though, was the customer service. I had an issue with a filter that malfunctioned, and Nick from iSpring went above and beyond to help. He was responsive, professional, and immediately sent replacement filters without any hassle. That level of support is rare these days and truly appreciated. It's clear that iSpring stands behind their products and genuinely cares about their customers. Thanks again to Nick for making the process smooth and stress-free. I highly recommend iSpring Filters to anyone looking for reliable water filtration and top- tier customer service.

## Frequently Bought Together

- iSpring Whole House Water Filter Cartridge, Iron & Manganese Reducing Water Filter Whole House, 4.5" x 20", Model: FM25B
- iSpring WSP-1000 Reusable Whole House Spin Down Sediment Water Filter, 1000 Micron, Flushable Prefilter Filtration, 20GPM, 1" MNPT + 3/4" FNPT, Brass
- iSpring ORBX2 Replacement O-ring for Whole House Water Filtration Systems - Pack of 2

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---

*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-16*