6-Stage RO / RODI Filter Replacement Kit – Sediment, Dual Carbon Pre-Filters, 1L DI Resin & Post-Carbon Pod

Revive your 6-stage reverse osmosis system with this all-in-one replacement kit from Osmotics—designed specifically for our high-performance 6-stage domestic RO and RODI units. This complete bundle refreshes every consumable filter stage (excluding the RO membrane), restoring exceptional water purity, great taste, and high flow rates for drinking, reef aquariums, window cleaning, car detailing, or any application demanding ultra-low TDS water.

The 6-stage configuration provides superior protection and polishing compared to basic 4- or 5-stage systems: dual pre-carbon filtration (block + granulated) for maximum chlorine/chemical/odor removal, plus a final inline carbon post-filter for that crisp, bottled-water finish. Buying as a kit saves money over individual purchases and ensures compatibility—no guesswork.

What's Included

• 1 × 5 Micron Sediment Pre-Filter (10" × 2.5") — Captures dirt, sand, rust, silt, and particles >5 microns to shield downstream components.
• 1 × Carbon Block Pre-Filter (10" × 2.5") — Removes chlorine, chloramine, VOCs, pesticides, and bad tastes/odours; protects the RO membrane from degradation.
• 1 × Granulated Activated Carbon (GAC) Pre-Filter (10" × 2.5") — Extra layer of carbon adsorption for enhanced chemical and organic contaminant reduction—ideal for UK tap water with variable quality.
• 1 Litre Mixed-Bed DI Resin (sealed in pharmaceutical-grade container) — Final deionisation polishing to achieve zero TDS ultra-pure water.
• 1 × Inline Carbon Post-Filter Pod (63mm diameter) — Final taste/odor polishing stage; ensures fresh, neutral water straight from the tap.

Key Benefits

• Maximum purity & taste — Dual pre-carbon + post-carbon delivers noticeably smoother, cleaner water with no plastic/chemical aftertaste.
• Prolongs system life — Fresh pre-filters prevent membrane fouling and extend RO membrane lifespan (replace membrane separately every 2–3 years).
• Convenient & cost-effective — Everything in one box at one low price; easy 30–60 minute DIY swap with no tools needed.
• Tailored for demanding uses — Perfect for high-purity needs like marine/reef aquariums (stable low TDS), professional window cleaning (spot-free results), or households with hard/chlorinated water.

Compatibility

Fits Osmotics 6-stage reverse osmosis systems (and most compatible setups with standard 10" housings and 63mm post-filter ports). Does not include the RO membrane—monitor TDS and replace every 24–36 months or when rejection drops.

Recommended Replacement Schedule (adjust based on local water quality, usage volume, and TDS monitoring)

• Sediment, Carbon Block & GAC pre-filters: Every 6–12 months (or if flow rate decreases noticeably).
• Inline Carbon Post-Filter: Every 12 months.
• DI Resin: Every 6–18 months (or when output TDS rises above your target—faster exhaustion with higher post-RO TDS). Replace sooner in high-sediment/chlorine areas or heavy-use scenarios.

Specifications

• Pre-Filter Size: Standard 2.5" × 10"
• Post-Filter: 63mm diameter inline pod
• Materials: Food-grade polypropylene/carbon, premium coconut shell GAC, high-capacity mixed-bed DI resin
• Weight: 2.1 kg
• SKU: OS-6SFRK

This kit is a customer favourite for keeping 6-stage systems at peak performance—reliable, great-value, and backed by Osmotics' expertise in pure water solutions. In stock with fast UK delivery. Pair it with our RO membrane replacements for full system maintenance.