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iSpring FG25B-KS 4.5" x 20" High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement Cartridge

$111.99
$111.99 $111.99
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iSpring FG25B-KS 4.5" x 20" High Capacity Heavy Metal Reducing GAC and KDF Whole House Water Filter Replacement CartridgeiSpring FG25B-KS

Features

Product Description

The FG25B-KS 20” x 4.5” compound filter is the official 2nd stage replacement filter cartridge for iSpring WGB32B-KS Whole House Water Filtration System. It also fits standard 20" whole house water filters. This filter is made of quality GAC and KDF and is designed to remove chlorine, lead, mercury, hydrogen sulfide, heavy metals, pesticides, herbicides, odors, and other contaminants. FG25B-KS works in tandem with carbon filters (FC25B) and sediment filters (FP25B) to create a reliable shield that protects you and your family from ingesting harmful chemicals and contaminants no matter which part of your home you are getting your water in.

  • Availability Out of Stock
  • Model FG25B-KS
  • Brand iSpring
  • Product Dimensions 20.0"L x 4.5"W x 4.5"H
  • Product Weight 6.31 LB

iSpring vs Other Brands

Feature
NSF/ANSI 58 Certification
Yes (full system certified)
Often partial or none
Verified performance & safety
Filtration Stages
Clear 3/4/5/7 stage options
Usually 4-5 stages
More complete options
Alkaline Remineralization
Available (RCC7AK/RCC7AK-UV)
Rare or expensive add-on
Better taste & pH balance
See-through 1st Stage Housing
Yes, smart flow sensor
Unavailable in most systems
Easy visual inspection
Daily Production
75 GPD (reliable output)
Often lower or overstated
Reliable daily production
Replacement Filters
Widely available & affordable
Hard or harder to find
Lower long-term cost
Installation
DIY friendly, no plumber needed
Can be more complex
Faster & easier set-up
Support & Warranty
Responsive support + solid warranty
Varies widely
Better post-purchase experience
Value for Money
High performance at competitive price
Higher price for similar specs
Better cost-effectiveness

Reviews

  • 5 stars: 1 (50%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (50%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Anonymous
The filters are great but why no O-ring?

Our replacement filters were easy to order and arrived promptly but no O-rings were included. When we last changed a water filter the O-ring was stretched out and we had to run to a hardware store to find one. These filters also came without an O-ring. Please send these with the filters - we haven't been able to find this size at hardware stores.

A
Anonymous
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