--- product_id: 298653073 title: "iSpring FM25B 4.5\" x 20\" Big Blue High Capacity Iron Manganese Reducing Replacement Water Filter" brand: "ispring" price: "€ 421.35" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.pt/products/298653073-ispring-fm25b-4-5-x-20-big-blue-high-capacity store_origin: PT region: Portugal --- # 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:** € 421.35 **Availability:** ✅ In 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?** € 421.35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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 Iron & Manganese ReducingiSpring iron & manganese reducing filter efficiently reduces iron (max 3. 0 ppm down to 0. 01 ppm) and manganese (max 1. 0 ppm down to 0. 01 ppm)Filtration Capacity: 50k gal at 3. 0ppm for iron ## 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 | | Brand | iSpring | | Compatible Water Purifier Models | iSpring WGB22BM | | Customer Reviews | 4.4 4.4 out of 5 stars (621) 4.4 out of 5 stars | | Enclosure Material | Iron | | External Testing Certification | ANSI | | Global Trade Identification Number | 00662425080076 | | Included Components | 1 FM25B filter | | Item Dimensions D X W X H | 15.2D x 55.9W x 15.2H Centimeters | | Item Type Name | Iron Manganese Reducing High Capacity Replacement Water Filter 4.5" x 20" | | Item Weight | 3.63 kg | | Manufacture Year | 2024 | | Manufacturer | iSpring | | Manufacturer Part Number | FM25B | | Manufacturer Warranty Description | 30-day money back, 1-year manufacturer warranty, lifetime tech support from Atlanta based family owned company 678-261-7611 M-F 9-5 EST sales@iSpringFilter.com | | Model Number | 1 | | Number Of Items | 1 | | Product Benefits | Reduces Iron | | Set Name | ISPK01 | | Unit Count | 1 Count | | 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/51-hRqU8k+L.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/715pecRuDWL.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/61aH+7LHQhL.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/81tVCZ1p5hL.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/91zI7jB-r4L.jpg) ## Available Options This product comes in different **Set name** 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 ### ⭐⭐⭐⭐⭐ Wasserfilter *by on Reviewed in Germany 26 July 2025* Danke werde wieder bestellen ### ⭐⭐⭐⭐⭐ Excellent product and amazing customer service! *by on Reviewed in the United States 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. ### ⭐⭐⭐⭐⭐ Excellent *by on Reviewed in Mexico 20 September 2019* As advertised ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/298653073-ispring-fm25b-4-5-x-20-big-blue-high-capacity](https://www.desertcart.pt/products/298653073-ispring-fm25b-4-5-x-20-big-blue-high-capacity) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-25*