10" Carbon Block Filter for RO Systems – 5 Micron Chlorine, Taste & Odour Removal | Osmotics UK

Enhance your reverse osmosis system's performance and enjoy noticeably cleaner, better-tasting water with this premium 10-inch carbon block filter from Osmotics. As the essential second-stage pre-filter in most domestic RO setups (after the sediment cartridge), this high-capacity block effectively removes chlorine, chloramine, bad tastes/odours, volatile organic compounds (VOCs), pesticides, and other organic chemicals—while also trapping fine sediment, rust, and particles down to 5 microns.

Manufactured from high-purity, acid-washed activated carbon (often coconut shell-based for superior adsorption), the dense extruded block design offers exceptional surface area for contaminant capture, high dirt-holding capacity, and virtually no carbon fines (no black specks in your water). This makes it a reliable choice over loose granular carbon (GAC) filters, providing both chemical adsorption and mechanical filtration in one cartridge.

Key Benefits

• Great-tasting water — Dramatically reduces chlorine/chloramine and organic tastes/odours for crisp, refreshing drinking/cooking water.
• Protects your RO membrane — Removes chemicals that can degrade or foul the membrane, extending its life (typically 2–3 years).
• Multi-stage filtration — Combines fine sediment removal (5 µm nominal) with broad chemical reduction (VOCs, pesticides, some microplastics).
• High capacity & low maintenance — Rated for up to 2500 gallons at 1 GPM; fewer replacements needed compared to basic filters.
• Versatile & compatible — Fits standard 10" RO housings (2.5" diameter), including Osmotics systems, under-sink units, and many whole-house pre-filters.

Specifications

• Size: Standard 10" length × 2.5" diameter (fits most slimline 10" housings)
• Micron Rating: 5 µm nominal
• Material: Extruded high-purity acid-washed activated carbon block
• Service Life: Up to 2500 gallons (at 1.0 GPM flow); typically 6–12 months in domestic use (depending on water quality, chlorine levels, and usage volume—replace sooner if taste returns or flow slows)
• Flow Rate: Recommended up to 1–2 GPM
• Certifications/Features: Low carbon fines, high adsorption capacity
• SKU: OS-CBF10

Compatibility Fits most standard 10-inch reverse osmosis systems (Osmotics and third-party brands with compatible housings). Ideal as stage 2 in 4/5/6-stage RO units after a 5 µm sediment pre-filter. Not for big blue housings (use BB versions if needed).

Recommended Replacement Schedule

• Replace every 6–12 months or after ~2000–2500 gallons (whichever comes first).
• Signs it's time: Return of chlorine taste/odour, reduced flow rate, or visible discolouration.
• For heavy UK domestic water (high chlorine): Lean toward 6 months; monitor with a simple taste test.

This bestselling carbon block filter is a customer favourite for good reason—simple, effective, and great value. In stock with fast UK delivery (next-day options available). Pair it with our 5 Micron Sediment Pre-Filter or full replacement kits for complete RO maintenance.