CB1 - 10in Coconut Shell Carbon Block Water Filter 2.5" x 9 3/4"

CB1 Coconut Shell Carbon Block Water Filter – 10in x 2.5in, 5 Micron

The WrekinWater CB1 is a 10in coconut shell carbon block cartridge for standard 10in x 2.5in filter housings. It reduces chlorine, bad tastes, odours, sediment and organic matter down to 5 micron, giving you cleaner, better-tasting water for drinking, cooking, tea and coffee. It suits under-sink drinking water systems, cold-tap filters and point-of-entry setups, and is a direct replacement for the Aqualyze AWF1 Waterway cartridge.

Technical Specifications

Signs It's Time to Replace Your CB1

• A chlorine taste or smell has come back into your filtered water.
• Flow from your drinking water tap has slowed noticeably.
• Tea, coffee or squash has started tasting "off" again.
• It has been six months or more since your last cartridge change.

Why It Matters

Activated carbon works by adsorption: chlorine and organic compounds stick to the vast internal surface area of the carbon's pores. Coconut shell carbon has a particularly fine pore structure, which makes it well suited to taste and odour reduction. Over time those pores fill up and the cartridge can no longer hold on to new contaminants, so taste and smell gradually return. At the same time, the tightly bonded 5 micron block traps fine particles, which slowly restrict flow. Changing the cartridge every six months keeps both performance and flow where they should be.

Why Buy This From WrekinWater

WrekinWater is a family run company based in Bettisfield, Shropshire, and has served more than 50,000 customers over 15 years. We're rated "Excellent" on Trustpilot and stock filtration and softener parts from major brands, so you can buy your replacement cartridges and housings in one place, with real people on hand if you're unsure what fits. UK Company No. 11000488.

How to Fit It

1. Turn off the water supply to the filter and open the filtered tap to release pressure.
2. Place a towel underneath, then unscrew the filter bowl using a housing spanner.
3. Remove the old cartridge. Check the bowl O-ring for damage and apply a light smear of food-grade silicone grease.
4. Rinse the bowl, then fit the new CB1 so it sits centrally on the seats at each end.
5. Screw the bowl back on hand-tight, then give it a small final turn with the spanner. Don't overtighten.
6. Restore the water supply slowly, check for leaks, then run the filtered tap until the water runs clear to flush out any loose carbon fines.

Low pressure or tank-fed supply? A dense carbon block restricts flow more than loose carbon. For lower-pressure systems, consider a granular carbon cartridge such as the Wrekin GC10 or Pentek GAC-10.