Features
Premium Quality Whole House Water Filter System
-
Second Stage Compound Water FilteriSpring FG25-KS targets chlorine, chloramine, PFAS, lead, mercury, hydrogen sulfide, heavy metals, herbicides, odors, and more.
For water with high hardness (TDS/Total Dissolved Solids > 300 ppm), consider adding a water softener like iSpring WCS45KG before your filtration system for best results.
-
Improve Your Quality of LifeInvest in health and peace of mind with the system.
Filtered water for cooking, bathing, and laundry avoids bad taste and contaminants.
Extends plumbing system and appliance lifespan.
Less burden on repairs and replacements.
Filter Replacements
- Tackles
- Sediments
- Chlorine Chloramine Lead PFAS
- Chlorine, Taste, Odor
- Chlorine Chloramine Lead PFAS
- Media
- Polypropylene
- GAC KDF
- Coconut Shell Carbon Block
- Granular Activated Carbon
- Recommended replacement cycle
- Up to 30,000 Gallons/6 Months
- Up to 50,000 Gallons/6 Months
- Up to 30,000 Gallons/6 Months
- Up to 30,000 Gallons/6 Months
- Size
- 2.5” x 20”
- 2.5” x 20”
- 2.5” x 20”
- 2.5” x 20”
- Number of Filters
- 4
- 1
- 4
- 4
- AvailabilityIn Stock
- Model FG25-KS
- Manufacturer iSpring
- Product Dimensions 22.0"L x 6.0"W x 6.0"H
- Product Weight 2.4 LB
Manuals
WCB32_Series_Manual.pdf
Download
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


FP25X4
FG25-KS
FC25X4
FG25X4