5-Stage RO Annual Filter Replacement Kit
5-Stage RO Annual Filter Replacement Kit
5-Stage RO Annual Filter Replacement Kit
This 5-stage annual filter replacement kit includes the filters needed to maintain a standard under-sink reverse osmosis system for a full year. It is designed for existing RO system owners who want a convenient, all-in-one maintenance solution.
Best for:
- Existing RO system owners on a regular maintenance schedule
- Homeowners replacing filters for the first time
- Anyone looking to simplify their annual filter change routine
Key benefits:
- Includes all five filter stages in one kit — no separate purchases needed
- Helps maintain consistent water flow and system performance over time
- Replacing filters on schedule helps extend the life of your RO membrane
- Standard 10" x 2.5" sizing fits most major under-sink RO brands
Compatibility:
Fits most standard 5-stage under-sink RO systems using 10" x 2.5" filter housings. Compatible brands typically include APEC, iSpring, Express Water, Home Master, and similar. Always verify your system’s housing size and stage configuration before ordering.
What’s included:
- Stage 1: 5-Micron Sediment Filter
- Stage 2 & 3: Carbon Block (CTO) Filters
- Stage 4: 75 GPD RO Membrane
- Stage 5: T33 Post-Carbon Inline Filter
Replacement schedule:
General guidance — sediment and carbon filters every 6 months; membrane and post-carbon filter annually. Follow your system manufacturer’s documentation for specific intervals.
Installation notes:
DIY-friendly. Requires turning off the water supply and depressurizing the system before changing filters. No plumber required for most standard systems.
If you are responding to a local utility notice or boil-water advisory, follow your local utility or health department’s official instructions first.
Certification and contaminant reduction claims depend on manufacturer documentation for the specific product.
Frequently Asked Questions:
Does this kit fit my RO system?
Check your system’s housing size (standard 10" x 2.5") and stage count before ordering.
Does this include the RO membrane?
Yes — a 75 GPD membrane is included as Stage 4.
How often should I replace these filters?
General guidance: sediment and carbon every 6 months, membrane annually. Follow your manufacturer’s schedule.
Can I buy individual filters instead?
Yes — each filter stage is available separately in our store.
What if I received a water notice from my utility?
Follow your utility or health department’s official instructions first. This product is not a substitute for official emergency water guidance.