iSpring F7-GAC 7-Count Replacement Filters for 5-Stage RO Systems — 1-Year Pack, Sediment & Carbon Set

The iSpring F7-GAC 7-count replacement filter pack supplies a full year of pre- and post-filtration for most standard 5-stage reverse osmosis systems.

This seven-piece cartridge set is engineered to restore and maintain the performance of compatible 5-stage RO systems by replacing sediment, carbon, and post-carbon elements on a recommended schedule. Individually wrapped for hygiene, the kit includes two sediment filters, two granular activated carbon (GAC) filters, two carbon block (CTO) filters, and one upgraded post-carbon filter with a push-fit quick connection. The set does not include the RO membrane; it refreshes the system’s upstream and downstream filtration so your unit continues producing clear, neutral-tasting water.

How do these replacement cartridges improve my tap water taste and clarity?

Replacing worn cartridges removes accumulated particles, chlorine taste, and organic compounds that make water taste flat or smell off. The layered approach—sediment first, then GAC, then carbon block—targets different contaminant types so the finished water is clearer and more neutral in flavor.

• Sediment filters trap rust, silt, and large particulates.
• GAC filters adsorb chlorine and volatile organic compounds (VOCs) that affect taste and odor.
• Carbon block filters polish water by reducing finer chemical residues.
• Post-carbon filter refreshes taste before the faucet for improved final flavor.

How easy is installation and what’s included in the pack?

Each cartridge arrives individually wrapped and is designed to match the standard sizes used in most 5-stage RO housings. The FT15 post-carbon cartridge uses a push-fit quick-connect fitting to speed up installation, while the other cartridges follow standard twist or screw-in replacements depending on your system model.

• Seven cartridges: 2 sediment, 2 GAC, 2 CTO, 1 post-carbon.
• Individually wrapped for clean handling and storage.
• Push-fit connection on the post-carbon for faster hookup.
• Installation guidance available in the manual or from iSpring support.

How often should I replace these filters and which parts aren’t included?

The cartridges in this pack are sized and rated to serve as 1-year replacements under typical household use when changed according to the system schedule. The RO membrane—which performs the semipermeable separation step—is not part of this pack and should be inspected or replaced on its recommended schedule, typically every 2–3 years depending on use and feed water quality.

• Standard recommendation: replace this pack once per year.
• Monitor flow rate and taste to detect earlier replacement needs.
• RO membrane sold separately; check your system’s membrane schedule.
• Contact iSpring support for model-specific guidance.

Will these filters fit my reverse osmosis system?

These cartridges are manufactured to fit most standard 5-stage RO housings; compatibility depends on your system’s cartridge diameter and connection types. Confirm your RO model’s filter size and connection style before purchasing—or consult iSpring’s compatibility resources to ensure a correct match.

• Fits most common standard 5-stage housings and sizes.
• Check cartridge diameter and connector type for exact fit.
• Post-carbon features a push-fit quick connection; other cartridges are standard replacements.
• iSpring support can confirm compatibility if needed.

Who is this for: The iSpring F7-GAC 7-count replacement pack is aimed at homeowners and renters with a compatible 5-stage RO system who want a convenient, single-purchase solution to refresh pre- and post-filtration for up to a year. It’s well suited for families seeking better-tasting drinking water, people replacing worn filters on schedule, and anyone who prefers a full set of OEM-grade cartridges rather than piecing together individual filters. If your RO system needs the membrane replaced, add the appropriate RO membrane separately to complete maintenance.