iSpring FM25B cartridge front view for efficient iron and manganese reduction at home.
iSpring FM25B cartridge side view showing compact size for easy placement.
iSpring FM25B installed in a WGB22BM system to improve water quality across the home.
iSpring FM25B media detail highlighting catalytic manganese for longer-lasting filtration.
iSpring FM25B NSF/ANSI tested and FDA compliant label confirming safety standards.
iSpring FM25B product in box, ready for replacement and simple maintenance.

iSpring

iSpring FM25B Whole House Water Filter Cartridge – Iron & Manganese Reduction (4.5 x 20)

High-performance tools and home improvement made for confident daily results

$111.21

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Why customers choose TaskHolt Tools

Overview

The iSpring FM25B is a replacement filter cartridge designed for whole-house systems. It targets iron and manganese, two common contributors to water that can affect taste, appearance, and appliance performance. Built for compatibility with iSpring WGB32BM and WGB22BM setups, this cartridge emphasizes consistent filtration across every faucet, shower, and appliance in your home.

Key benefits

  • Iron and manganese reduction: reduces iron up to 3.0 ppm down to 0.01 ppm and manganese up to 1.0 ppm down to 0.01 ppm for noticeably clearer water.
  • Whole-house impact: filters water at the point of entry, supporting consistent quality from kitchen taps to laundry and beyond.
  • Sensor-free filtration that works with standard household pressure ranges, helping you maintain steady flow without sudden drops.

Performance and efficiency

  • Efficient design with higher linear velocities than conventional media, enabling high flow rates and a very low pressure drop.
  • Feed water pressure tolerance: 20 – 100 psi, with an approximate 5 psi drop at 8 gpm, helping maintain steady performance in typical homes.
  • Designed to remove contaminants without compromising throughput, supporting daily routines from dishes to showers.

Durability and reliability

  • Stable operation across a pH range of 5.8–8.6 and temperatures from 40–113 °F, supporting diverse water conditions.
  • Longer-lasting media compared with some alternatives, as the catalytic surface is not consumed in the filtration process, potentially delivering more service between changes.
  • Estimated life: up to 50,000 gallons at 3.0 ppm iron, or about 12 months at 200 GPD, depending on usage and water composition.

Quality & support

Manufactured to FDA standards and independently tested against NSF/ANSI benchmarks for water quality and material safety. iSpring offers lifetime free tech support from a U.S. based team, and support is available if you need help with installation or replacement.

What to expect in your setup

Use the FM25B as a straightforward replacement cartridge for compatible iSpring whole-house systems. Regular replacement helps sustain filtration performance and protect your home’s water-related appliances and fixtures.

FAQ

Q: What does the FM25B cartridge filter out?

A: It reduces iron up to 3.0 ppm to 0.01 ppm and manganese up to 1.0 ppm to 0.01 ppm for improved water quality.

Q: Is the FM25B compatible with my iSpring system?

A: Yes. It replaces cartridges in WGB32BM and WGB22BM whole-house systems.

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