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iSpring Whole House Water Filter Cartridge, Iron & Manganese Reducing Water Filter Whole House, 4.5" x 20", Model: FM25B

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Availability: In Stock.
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Arrives Friday, Aug 8
Order within 6 hours and 34 minutes
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Style: Iron Filter


Pattern Name: Water Filter


Features

  • Replacement filters for iSpring whole house water filter systems (fits systems WGB32BM and WGB22BM)
  • Powerful Iron & Manganese Reducing: iSpring FM25B whole house water filter cartridge 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).
  • Efficient performance: This iron filter whole house has higher linear velocities than conventional media and delivers high flow rates & very low pressure drop. Feed water pressure: 20 - 100 psi. Pressure impact: up to 5 psi drop at a flow rate of 8 gpm. The iSpring FM25B whole house filter effectively removes harmful substances, improves water quality, and protects family health.
  • Excellent Stability and Durability: Stable and satisfactory performance at a wide pH range 5.8 - 8.6 and temperature range 40 - 113F. FM25B whole house water filter lasts up to 3 times longer than green sand due to the catalytic media not being consumed in the process. Filter life: 50,000 gallons at 3.0 ppm iron level, or about 12 months @ 200GPD.
  • High Quality Requirements: Safe for Drinking Water Applications. The water filter is 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. Life-time free tech support from U. S. local support team. We stand behind our products and if you encounter any problems with any of our water filters please reach out to us immediately. We are happy to help!

Material: Iron


Product Dimensions: 6"D x 22"W x 6"H


Item Weight: 8 Pounds


External Testing Certification: ANSI


Product Benefits: Removes Iron and Manganese


Material: ‎Iron


Product Dimensions: ‎6"D x 22"W x 6"H


Item Weight: ‎8 Pounds


External Testing Certification: ‎ANSI


Product Benefits: ‎Removes Iron and Manganese


Brand: ‎iSpring


Manufacture Year: ‎2024


UPC: ‎662425080076


Global Trade Identification Number: ‎76


Unit Count: ‎1.0 Count


Compatible Water Purifier Models: ‎iSpring WGB22BM, iSpring WGB32BM


Number of Items: ‎1


Manufacturer: ‎iSpring


Part Number: ‎FM25B


Item Weight: ‎8 pounds


Country of Origin: ‎Taiwan


Item model number: ‎1


Is Discontinued By Manufacturer: ‎No


Size: ‎1 Count (Pack of 1)


Color: ‎White


Style: ‎Iron Filter


Pattern: ‎Water Filter


Item Package Quantity: ‎1


Number Of Pieces: ‎1


Number of Handles: ‎1


Included Components: ‎1 FM25B filter


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: December 30, 2015


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Aug 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Quality
Style: 5-Micron Sediment Filter Pattern Name: Water Filter
Great filter!!!
Reviewed in the United States on June 24, 2025 by matt hawkins

  • Outstanding service and product
Style: Carbon Filter 4-Pack Pattern Name: Water Filter
I purchased an iSpring wall mounted three stage (canister) whole house water filtration system several years ago to replace a dual tank floor mounted system that took up too much room and did not back flush properly and could not deliver quality water results. The iSpring system takes up very little wall space and maintenance is easy, simply changing the three filters yearly based on our water usage. Customer service was great with Nick giving me sound advice regarding installation. A couple of years later he gave me good advice as to the use a heat gun to loosen tanks when I had overtightened two canisters. I recently learned that Nick is still providing customer service when I had a question regarding an order for replacement filters. We are serviced by a small water utility company which has pure water, but the water has high levels of sand and sometimes high levels of chlorine. The 5-micron sediment filter removes most of the sand and two CTO carbon block filters do a great job removing chlorine and any remaining sand. We do experience water line breakage occasionally which can introduce large amounts of sediment into the lines which is a health hazard and can damage water heaters, dish washers, and washing machines leading to premature failure. This is another reason to install a whole house system instead of point of source filters for sinks and lavatories. I do find the iSpring replacement filters high quality and reasonably priced particularly when purchased in cases of four like my recent order. Merlin ... show more
Reviewed in the United States on January 7, 2025 by Amazon Customer

  • Great Customer Service
Style: Lead Filter Pattern Name: Water Filter
iSpring products are terrific and I could not be happier with my water quality. I have had my system running flawlessly since 2017. Recently, I had a problem with a low flow rate on a newly installed filter. I contacted iSpring customer service and communicated with Julius. What a pleasure to receive such a prompt and courteous response. He understood the problem and arranged to ship a replacement. They have great products and it’s reassuring to know that they stand behind them. ... show more
Reviewed in the United States on April 7, 2025 by susan ridge

  • Iron filler
Style: Iron Filter Pattern Name: Water Filter
Good filter. Feeling like 3ppm is a bit high for what it can take but definitely helps.
Reviewed in the United States on March 22, 2025 by Trav

  • Excellent product with excellent support
Style: GAC&KDF Filter Pattern Name: Water Filter
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. ... show more
Reviewed in the United States on March 5, 2025 by Rugro

  • Amazing customer service
Style: 5-Micron Sediment Filter 4-Pack Pattern Name: Water Filter
This company has amazing customer service, especially Sean over there. The equipment works very well most of the time, and when it does not, they immediately rectify the situation. A great value all around.
Reviewed in the United States on April 7, 2025 by Kyle McNamara

  • Great filters and customer service
Style: Carbon Filter 4-Pack Pattern Name: Water Filter
These are great. I have a three filter system and have these FC25B Carbon filters in all of them. I replaced a big, non-serviceable 4ft whole-house carbon filter tank with this system because my water is so bad that the carbon filter needs to be replaced periodically, and the "lifetime" tank wasn't a good solution. NOTE: Sean in customer service has been especially helpful with my filter needs. THANKS! ... show more
Reviewed in the United States on April 6, 2025 by Larry S

  • Eliminates mold due to iron & manganese in the water
Style: Iron Filter Pattern Name: Water Filter
I retrofitted this iSpring filter & housing into my current whole house water filtration system. My system, prior to the FM25B installation, did a great job of removing particulate & chlorine from my public water but actually exacerbated the mold growth in my sink drains & faucet aerators, shower heads, due to the lack of chlorine. After reading up on this phenomenon I found that the culprit is residual iron & manganese in the water, which w/ the lack of chlorine to counteract the oxidation, actually promotes the growth. Thus the addition of the iSpring iron & manganese filter as the last stage in my system. Voila' , the mold is gone! No pink or brownish/black mold in the sinks, shower, etc. A 2nd benefit is that the water is now also significantly softer. I consulted w/ iSpring customer service rep Francis a couple of times prior to my purchase. He was extremely helpful, filling me in on the filter details, e.g. Fe & Mn particulate size limits. He even recommended that I contact my local water authority to verify what those #s are. FYI - that was a bit of a challenge given that these metals are NOT regulated by FDA guidelines & only measured against "recommendations". Smaller is better obviously because this determines the life of the filter. This is no small concern given the cost of the filter. Replacing it 1-2x per year is financially viable, 1/mo isn't. And finally, given the size of the filter and that it's added to my current system I decided to include a pressure regulator after the last filter stage (see pix) expecting that there'd be a pressure drop that I'd have to accommodate for. In the end, all is good, problem solved & pressure is still very good. ... show more
Reviewed in the United States on December 1, 2020 by pbnoj pbnoj

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