---
product_id: 204236365
title: "FM15B Iron and Manganese Reducing Replacement Water Filter Cartridge for Whole House Water Filtration System iSpring WGB21BM, 10\"x4.5\" High Capacity"
brand: "ispring"
price: "4561529₫"
currency: VND
in_stock: true
reviews_count: 13
category: "I Spring"
url: https://www.desertcart.vn/products/204236365-fm15b-iron-and-manganese-reducing-replacement-water-filter-cartridge-whole
store_origin: VN
region: Vietnam
---

# High flow rate 4-8 GPM, low pressure drop Reduces iron & manganese to 0.01 ppm Fits 10"x4.5" whole house systems FM15B Iron and Manganese Reducing Replacement Water Filter Cartridge for Whole House Water Filtration System iSpring WGB21BM, 10"x4.5" High Capacity

**Brand:** ispring
**Price:** 4561529₫
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your home water game—because clean water is the new luxury.

## Quick Answers

- **What is this?** FM15B Iron and Manganese Reducing Replacement Water Filter Cartridge for Whole House Water Filtration System iSpring WGB21BM, 10"x4.5" High Capacity by ispring
- **How much does it cost?** 4561529₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/204236365-fm15b-iron-and-manganese-reducing-replacement-water-filter-cartridge-whole)

## 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

- • **Long-Lasting Durability:** Outlasts green sand filters by 3x, filtering up to 30,000 gallons before replacement.
- • **Unmatched Flow Efficiency:** Enjoy steady 4-8 GPM flow with minimal pressure loss—no compromises on water pressure.
- • **Certified Quality & Support:** NSF/ANSI tested, FDA compliant, plus lifetime US-based tech support for peace of mind.
- • **Precision Iron & Manganese Removal:** Slash iron from 3.0 ppm to near zero for crystal-clear water.
- • **Seamless Whole House Compatibility:** Effortlessly fits iSpring WGB21BM and most 10"x4.5" systems.

## Overview

The iSpring FM15B is a high-capacity replacement water filter cartridge designed to dramatically reduce iron and manganese levels in whole house water filtration systems. Compatible with iSpring WGB21BM and most 10"x4.5" filters, it delivers a robust flow rate of 4-8 GPM with minimal pressure drop. Engineered for durability, it lasts up to three times longer than traditional green sand filters, treating up to 30,000 gallons. Certified to NSF/ANSI standards and FDA compliant, it ensures safe, clean water with reliable US-based customer support.

## Description

Located in Atlanta, 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. Fitting iSpring whole house water filtration system WGB21BM and most whole house systems that use 10" x4.5" filters, iron and manganese reducing filter FM15B can effectively reduce the levels of iron (Max 3.0 ppm down to 0.01 ppm) and manganese (Max 1.0 ppm down to 0.01 ppm) in water coming into your house and provide you and your loved ones with safe, clean, and healthy water.

Review: works well long lasting filter - works well, long lasting
Review: HUGE Difference with Well Water, No longer Slippery or Smelly - I know we should get a comprehensive water test for our well water, but for $200-$300 that's steep. We knew from simple testing that it was high pH about 8.5 with limestone in our area and suspected iron content because that's common to wells in our area. We were using a dual whole house system with 5 micron sediment filter followed by carbon filter. Water was usable but slippery and smelled like metal. Confirmed clear water iron issue (ferrous iron) by the rust color in commodes over time. Ferrous iron is clear in water, but reacts with oxygen in the air to form the colored sediment/stains. We added a spin down 40 micron sediment filter before the other filters. After 3 months flushed the spin down filter and almost nothing in it. Doesn't seem to be a sediment issue, confirmed later by replacing the 5 micron sediment filter with this FM15B Iron and Manganese filter. The silt in the housing was the same as before the spin down sediment filter, so we didn't really need the 5 micron sediment filter. After a few days on the Iron filter - WoW! Water no longer slippery, smells a lot better, soap washes off easily in the shower, almost like having a water softener! We'll have to see how long this filters lasts since we don't really know the degree of iron contamination. So far, very happy with this iron and manganese filter and wish we had done it sooner!

## Features

- [Powerful Iron & Manganese Reducing] iSpring FM15B is specially designed for iron & manganese removal, reducing iron (Max 3.0 ppm down to 0.01 ppm) and manganese (Max 1.0 ppm down to 0.01 ppm). Effectively removes harmful substances, improves water quality and protects family health. Fits iSpring whole house water filtration system WGB21BM and most whole house systems that use 10" x4.5" filters.
- [Efficient Performance] Higher linear velocities than conventional media deliver high flow rates and very low pressure drop. 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 .
- [Excellent Stability and Durability] Stable and satisfactory performance at a wider pH range 5.8 - 8.6 and temperature range 40 - 113°F. Lasts up to 3 times longer than green sand due to the catalytic media not being consumed in the process. Filter life: 30,000 gallons at 3.0 ppm iron level
- [High Quality Product] Manufactured to comply strictly with FDA standards and tested by independent third party against NSF/ANSI standards for water quality, material safety and structural integrity.
- [Peace-of-Mind Customer Service] Register online to activate your extended manufacturer warranty and life-time free tech support from U.S. local support team. We stand behind our products. If you encounter any problems with any of our products, please reach out to us immediately. We are happy to help!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B088C381QD |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #76,009 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #570 in Replacement Under-Sink Water Filters |
| Brand | iSpring |
| Color | 10"x4.5" High Capacity |
| Customer Reviews | 4.3 4.3 out of 5 stars (233) |
| Date First Available | May 8, 2020 |
| Global Trade Identification Number | 00810004171855 |
| Item Package Quantity | 1 |
| Item Weight | 4.05 pounds |
| Item model number | 1 |
| Lower Temperature Rating | 40 Degrees Fahrenheit |
| Manufacturer | iSpring |
| Maximum Flow Rate | 8 Gallons Per Minute |
| Model Name | FM15B Iron and Manganese Reducing Replacement Water Filter Cartridge |
| Part Number | FM15B |
| Power Source | Ac |
| Product Dimensions | 4.5 x 4.5 x 10 inches |
| Size | 1 Count (Pack of 1) |
| Special Feature | Multi Stage Filtration, NSF certified |
| Special Features | Multi Stage Filtration, NSF certified |
| Style | Iron and Manganese Reducing |
| Supported Water TDS Level Maximum (PPM) | 300 |
| UPC | 810004171855 |
| Upper Temperature Rating | 113 Degrees Fahrenheit |
| Warranty Description | Warranty and Support: By default every iSpring whole house water filtration system comes with thirty-day money back policy and one-year limited manufacturer warranty. We care and love to help customers. Besides DIY videos on YouTube and Knowledge Base on our website, we provide direct customer service from Atlanta, GA. Please don't hesitate to reach out to us before and after your purchase. Your s… |

## Product Details

- **Brand:** iSpring
- **Capacity:** 30000 Gallons
- **Included Components:** 1 Filter
- **Lower Temperature Rating:** 40 Degrees Fahrenheit
- **Material:** Carbon Fiber
- **Maximum Flow Rate:** 8 Gallons Per Minute
- **Model Name:** FM15B Iron and Manganese Reducing Replacement Water Filter Cartridge
- **Power Source:** Ac
- **Purification Method:** Ion Exchange
- **Special Feature:** Multi Stage Filtration, NSF certified

## Images

![FM15B Iron and Manganese Reducing Replacement Water Filter Cartridge for Whole House Water Filtration System iSpring WGB21BM, 10"x4.5" High Capacity - Image 1](https://m.media-amazon.com/images/I/61fjFJPs-oL.jpg)

## Questions & Answers

**Q: Is this filter micron rated?**
A: Hi there, This filter has no micron rating. Inside the cartridge are resin based materials. The expected pressure drop is around 5 psi at 8 GPM incoming water pressure. Please reach out to our customer service team for additional questions.

iSpring Water Systems, LLC

**Q: The filter has open and close markings on top.  Is the filter supposed to be opened when installed?**
A: Hi Jaime,

Please ignore the open/close markings on the lid. The filter will be placed inside the housing just the same as the other filters with no manipulation of lid. If‌ ‌you‌ ‌have‌ ‌any‌ ‌questions‌ ‌or‌ ‌need‌ ‌additional‌ ‌assistance,‌ ‌please‌ ‌contact‌ ‌us‌ ‌at‌ ‌support@123filter.com‌ ‌or‌ ‌call‌ ‌us‌ ‌at‌ ‌(678)‌ ‌261-7611.‌ ‌
 ‌
Thanks,‌ ‌
 ‌
iSpring‌ ‌Water‌ ‌Systems,‌ ‌LLC

**Q: Does this product conform to prop 65? i live in california, can i buy it here?**
A: We know that some customers are concerned about the Prop 65 warning listed on our products. So instead of leaving it as a mystery, let’s talk about what is the Prop 65 warning and why it is listed on our products.


What is Proposition 65?

In November 1986, California voters approved a ballot initiative to address concerns about toxic chemicals exposure. That initiative became the Safe Drinking Water and Toxic Enforcement Act of 1986, better known by its original name, Proposition 65 or simply, Prop 65.


New regulations affecting Proposition 65 were adopted in August 2016 and have been fully effected since August 2018. Changes to the law impose additional requirements for products sold in California, including:


1. Point of sale warning requirements.
2. The specific identification in the warning language of at least one chemical known to cause cancer, birth defects, or other reproductive harm used in a given product.


 


How many chemicals are included under Prop 65?

This list was first published in 1987 and has been kept updated at least once a year. It now includes over 900 chemicals. Prop 65 warnings are seen throughout California in a wide range of settings and on various consumer products that we use every day, including coffee, furniture, automobile upholstery, wall coverings, housewares, automotive parts, and so on. Even Starbucks and Disneyland Resort in California must have Prop 65 warnings. The complete Proposition 65 List is available at https://oehha.ca.gov/proposition-65/proposition-65-list.


 


Does a Prop 65 warning equal unsafe?

No. Prop 65 is far more stringent than FDA and EU standards.Prop 65 Warnings are required for even tiny levels of these natural substances - sometimes a 1000 times less than the minimum safe dose established by health authorities. A Prop 65 warning does not automatically mean that the product is unsafe.


 


Why is Prop 65 listed under our products?
The UV light bulb contains tiny amounts of mercury, and mercury is required to have a Prop 65 warning by the State of California because they can cause birth defects or other reproductive harm. Although the UV light bulb contains mercury, no chemicals will leach into the water. Besides, all water-contacting parts are made of BPA-free (Bisphenol A) materials.



How can I get more information?

The California Office of Environmental Health Hazard Assessment, OEHHA, maintains a comprehensive website at https://oehha.ca.gov/proposition-65,which explains the law and offers a list of all the chemicals and materials.


You can call the Office of Environmental Health Hazard Assessment's Proposition 65 Implementation Office at (916) 445-6900 or send an email to P65.Questions@oehha.ca.gov.

**Q: will this filter remove calcium**
A: Hi there, The FM15B can't remove calcium. For calcium, you can use the WDS150k model or an RO system to ensure that you have the lowest calcium level possible. Please reach out to our customer service team for further assistance. We're always ready to help.

iSpring Water Systems, LLC

## Customer Reviews

### ⭐⭐⭐⭐⭐ works well long lasting filter
*by R***K on January 20, 2026*

works well, long lasting

### ⭐⭐⭐⭐⭐ HUGE Difference with Well Water, No longer Slippery or Smelly
*by L***A on October 30, 2025*

I know we should get a comprehensive water test for our well water, but for $200-$300 that's steep. We knew from simple testing that it was high pH about 8.5 with limestone in our area and suspected iron content because that's common to wells in our area. We were using a dual whole house system with 5 micron sediment filter followed by carbon filter. Water was usable but slippery and smelled like metal. Confirmed clear water iron issue (ferrous iron) by the rust color in commodes over time. Ferrous iron is clear in water, but reacts with oxygen in the air to form the colored sediment/stains. We added a spin down 40 micron sediment filter before the other filters. After 3 months flushed the spin down filter and almost nothing in it. Doesn't seem to be a sediment issue, confirmed later by replacing the 5 micron sediment filter with this FM15B Iron and Manganese filter. The silt in the housing was the same as before the spin down sediment filter, so we didn't really need the 5 micron sediment filter. After a few days on the Iron filter - WoW! Water no longer slippery, smells a lot better, soap washes off easily in the shower, almost like having a water softener! We'll have to see how long this filters lasts since we don't really know the degree of iron contamination. So far, very happy with this iron and manganese filter and wish we had done it sooner!

### ⭐⭐⭐⭐⭐ I works
*by J***Z on July 6, 2025*

I have a cabin on Lake Michigan and the water from our well is so hard that it chips your teeth when you drink it. (sorry for the dad joke) Please note that this is a seasonal cabin and is not winterized. None the less, this filter does a great job in cutting down of the yellowing of toilet bowls and shower walls. No filter can eliminate 100% of the iron or manganese in the water (need a good water softener to do it completely) , but it cuts down on the times between cleanings. We would need to clean the residue from the toilets before filter at least once a week, now it's every 2 months. White shower walls, now once a season. This filter along with I-Springs activated charcoal filter has eliminated the need for us buying drinking water.

## Frequently Bought Together

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---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-02*