iSpring FC15B activated carbon block filter improves water taste and odor
iSpring under-sink Direct Connect system shows compact filtration setup
iSpring whole-house filtration flow illustrating steady, clean water across every faucet
iSpring CTO carbon block replacement in progress for simple maintenance
iSpring sealed freshness packaging communicates long filter life and freshness

iSpring

iSpring FC15B High Capacity Activated Carbon Block Filter – 5-Micron 10x4.5 Under Sink & Whole House

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

$49.15

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Why customers choose TaskHolt Tools

iSpring FC15B: High-Capacity Activated Carbon Block Filter

Meet the iSpring FC15B high-capacity activated carbon block filter, designed for durability and reliable performance in both under-sink and whole-house setups. It fits as the second stage for the US21B under-sink system and as the first stage in WGB21BM and WGB21B-PB whole-house configurations. This consistency across systems helps simplify shopping and installation.

What this filter targets

  • Reduces free chlorine, resulting in cleaner taste and fresher aroma.
  • Minimizes odors and cloudiness while maintaining steady flow.
  • Effective against organic compounds such as herbicides and industrial solvents, and reduces THMs.
  • Surfactants, binders, and adhesives are not used in the carbon block; no carbon ash leaching.

Performance and life

  • Provides long-lasting filtration, with up to 50,000 gallons of water or approximately 6 months of use, depending on source water and flow.
  • Individually sealed for freshness, helping ensure consistent filtration when you replace it.
  • Designed to fit standard 10x4.5 inch cartridges for under-sink or whole-house systems.

Compatibility and installation

  • Official replacement for iSpring Under Sink Water Filter System US21B and Whole House systems WGB21B, WGB21BM, and WGB21B-PB.
  • Versatile enough to work as the second stage in some setups or as the first stage in others, depending on your configuration.

With iSpring, you also gain access to consumer support and a straightforward replacement process for ongoing peace of mind.

FAQ

Q: What systems is the iSpring FC15B compatible with?

A: It serves as the second stage for US21B under-sink and the first stage for WGB21BM and WGB21B-PB whole-house systems.

Q: How often should I replace the FC15B filter?

A: Typically every 6 months or after about 50,000 gallons, depending on water quality and usage.

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