---
product_id: 424026284
title: "PUREPLUS 5 Micron 20\" x 4.5\" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack"
brand: "pureplus"
price: "23113 kr"
currency: ISK
in_stock: true
reviews_count: 11
category: "Pureplus"
url: https://www.desertcart.is/products/424026284-pureplus-5-micron-20-x-4-5-rfn20bb-whole-house
store_origin: IS
region: Iceland
---

# reduces iron & manganese to 0.01 ppm reusable resin granules, 6-month lifespan 5 micron precision filtration PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack

**Brand:** pureplus
**Price:** 23113 kr
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack by pureplus
- **How much does it cost?** 23113 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/424026284-pureplus-5-micron-20-x-4-5-rfn20bb-whole-house)

## Best For

- pureplus enthusiasts

## Why This Product

- Trusted pureplus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Compatibility:** Fits PUREPLUS 20"x4.5" systems and top filtration setups.
- • **Whole House Protection:** Professional-grade filtration for every tap in your home.
- • **Cost-Saving Reusability:** Simply soak in salt water to renew filter power and extend life.
- • **Durable & Tested Quality:** Built with ISO9001 standards and survives 400 PSI pressure tests.
- • **Precision Iron & Manganese Removal:** Slash iron from 3.0 ppm to near zero for crystal-clear water.

## Overview

The PUREPLUS RFN20BB is a 5-micron whole house water filter cartridge engineered to drastically reduce iron and manganese levels from domestic water supplies, improving taste and safety. Manufactured under rigorous ISO9001 standards and tested for durability, it offers a 6-month or 4,000-gallon lifespan with reusable resin granules that can be refreshed via saltwater soaking. Compatible with PUREPLUS 20"x4.5" filtration systems, it delivers professional-grade filtration for healthier water throughout your home.

## Description

desertcart.com: PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack : Tools & Home Improvement

Review: Water taste much better - Use this as a replacement for my Watts whole house filtration system. It is working well and our water taste better than a different type of filter I tried. So far so good and will definitely purchase again if it holds up.
Review: Good replacement for OEM - Good quality filters for home use. Easy to change out.

## Features

- 𝐑𝐞𝐦𝐨𝐯𝐚𝐥 𝐨𝐟 𝐈𝐫𝐨𝐧 & 𝐌𝐚𝐧𝐠𝐚𝐧𝐞𝐬𝐞 -The reusable resin granule filter is specially designed for iron & manganese removal in domestic water, reducing iron (Max 3.0 ppm down to 0.01 ppm) and manganese (Max 1.0 ppm down to 0.01 ppm). This filter can effectively removes harmful substances, improves water quality and protects family from heavy metal pollution.
- 𝐂𝐚𝐫𝐞𝐟𝐮𝐥𝐥𝐲 𝐒𝐞𝐥𝐞𝐜𝐭𝐞𝐝 𝐒𝐮𝐩𝐞𝐫𝐢𝐨𝐫 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥𝐬 - Our filters are produced under the ISO9001 standard and inspected under strict quality control. Each filter is produced through 34 production processes, 400PSI pressure test, 10,000 water hammer tests, and 6 independent tests.
- 𝐋𝐨𝐧𝐠-𝐭𝐞𝐫𝐦 𝐀𝐧𝐝 𝐑𝐞𝐩𝐞𝐚𝐭𝐞𝐝 𝐔𝐬𝐞 - PUERPLUS RFN20BB filter can be used for 6 months or 4,000 gallons before replacement, whichever comes first. The inner reusable resin granule filter can be soaked in salt water for 12 hours to restore the function of reducing iron and manganese, helps save your money.
- 𝐏𝐫𝐨𝐯𝐢𝐝𝐞 𝐖𝐡𝐨𝐥𝐞 𝐇𝐨𝐮𝐬𝐞 𝐅𝐢𝐥𝐭𝐫𝐚𝐭𝐢𝐨𝐧 -Suggested used in 3 Stage filtration protection, this filter is specially designed to provide professional filtration performance for well water. This whole house filtration system will provide healthy and safe water for your entire family.
- 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐥𝐞 𝐌𝐨𝐝𝐞𝐥𝐬 -The filter can be used in PUREPLUS 20”x 4.5”Whole House Water Filter, 3 Stage 20" Home Water Filtration System.Togethter with the other filter, they provide cleaner, better tasting water for a great drinking experience for your whole family.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09JW38NFD |
| Best Sellers Rank | #27,766 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #224 in Replacement Under-Sink Water Filters |
| Brand | PUREPLUS |
| Customer Reviews | 4.6 4.6 out of 5 stars (230) |
| Date First Available | October 20, 2021 |
| External Testing Certification | IAPMO |
| Item Weight | 7.41 pounds |
| Item model number | RFN20BB |
| Manufacture Year | 2023 |
| Manufacturer | PUREPLUS |
| Material | Resins |
| Number of Items | 1 |
| Product Benefits | Removes Iron & Manganese, Improves Water Quality, Protects from Heavy Metal Pollution |
| Product Dimensions | 4.5"D x 4.5"W x 20"H |
| Set Name | Whole House |
| Unit Count | 1.0 Count |

## Product Details

- **External Testing Certification:** IAPMO
- **Item Weight:** 3.37 Kilograms
- **Material:** Resins
- **Product Benefits:** Removes Iron & Manganese, Improves Water Quality, Protects from Heavy Metal Pollution
- **Product Dimensions:** 4.5"D x 4.5"W x 20"H

## Images

![PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack - Image 1](https://m.media-amazon.com/images/I/31zxYMnUz9L.jpg)
![PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack - Image 2](https://m.media-amazon.com/images/I/41AC2MX9OOL.jpg)
![PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack - Image 3](https://m.media-amazon.com/images/I/41UPgUQ1-rL.jpg)
![PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack - Image 4](https://m.media-amazon.com/images/I/512DMEtkwmL.jpg)
![PUREPLUS 5 Micron 20" x 4.5" RFN20BB Whole House Iron & Manganese Reduce Water Filter Replacement Cartridge, Replacement for FM25B, RFFE20-BB, CFRFFE-20BB, 1 Pack - Image 5](https://m.media-amazon.com/images/I/51d5ZeU2JzL.jpg)

## Questions & Answers

**Q: Does this filter need to be flushed?**
A: You’ll have to flush the new filter for 5 minutes to condition it.

**Q: Does this filter cartridge replacement require gaskets?**
A: Gaskets are not essential for this specific filter. The filter's soft end caps establish a good sealing when the filter is being pressed down by the housing cover/lid while you are tightening it.

**Q: When should I replace the filter?**
A: It is recommended to change the filter every 6-12 months or when water taste changes or water flow reduces significantly it's probably time to replace the filter.

**Q: Should I turn off the water valve when I change the filter?**
A: Yes, please shut off the water supply before you change the filter.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Water taste much better
*by A***M on October 29, 2025*

Use this as a replacement for my Watts whole house filtration system. It is working well and our water taste better than a different type of filter I tried. So far so good and will definitely purchase again if it holds up.

### ⭐⭐⭐⭐⭐ Good replacement for OEM
*by D***L on November 11, 2025*

Good quality filters for home use. Easy to change out.

### ⭐⭐⭐⭐⭐ Water filter
*by M***I on November 18, 2025*

Perfect fit at a reasonable price

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---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-08*