• Free Shipping
  • 1-Year Warranty
  • 30-Day Return
  • Lifetime Tech Support

iSpring F4US Standard RO Systems 6-Month Replacement Prefilter Cartridge Pack Set, 4 Filters w/ Sediment, CTO, GAC and Post-Carbon,10" × 2.5"

$78.99
$78.99 $78.99
Shipping calculated at checkout.

In stock · Ships within 1–2 business days

iSpring F4US
$78.99
iSpring F4US Standard RO Systems 6-Month Replacement Prefilter Cartridge Pack Set, 4 Filters w/ Sediment, CTO, GAC and Post-Carbon,10" × 2.5"iSpring F4US

Features

What is included:

1x US Made 5 Micron Sediment Filter:
Average Filter Life: 6- 12 months, depending on your source water and usage.
1x US Made Granular Activated Carbon (GAC) Filter:
Average Filter Life: 6- 12 months, depending on your source water and usage.
1x US Made Carbon Block (CTO) Filter:
Average Filter Life: 6- 12 months, depending on your source water and usage.
1x US Made Post Carbon Inline Filter:
Average Filter Life: Up to 12 months, depending on your source water and usage.

Compatible with most industry standard 10" reverse osmosis RO systems. All filters are tested by an independent third-party to meet NSF/ANSI standards.

Why iSpring?

iSpring Water Systems LLC is a family owned company located in Georgia, USA specializing in reverse osmosis water filtration systems. With over a decade of experience, our products include top of the line residential and commercial reverse osmosis (RO) systems, whole house water systems, ultrafiltration systems, shower, faucet, and counter top filters, filter cartridges and housings, kitchen faucets and fittings. Our aim is to make high quality drinking water accessible for all households. With affordable pricing, high quality, prompt delivery, and top notch customer service, we hope to assist in bringing you great water for many years to come.

  • AvailabilityIn Stock
  • Model F4US
  • Manufacturer iSpring
  • Product Dimensions 10.0"L x 10.0"W x 4.0"H
  • Product Weight 4.0 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