Our premium high-flow carbon stage: coconut-shell granular activated carbon that delivers superior chlorine, taste, odor, and VOC reduction — with the minimal pressure drop only a GAC bed can give.
Stage
Pre-carbon · after sediment
Fits
Standard Big Blue housings
What it does
The CGAC-10BB fills its Big Blue shell with premium coconut-shell granular activated carbon. As water flows through the carbon bed, the granules adsorb chlorine and the organic compounds (VOCs) behind bad taste and odor — and coconut carbon’s finer micropore structure gives it a real edge on taste polishing and small organic molecules compared with standard GAC.
You keep GAC’s signature advantage: flow. Water moves through a granular bed far more freely than through a solid carbon block, so this cartridge treats whole-house flow with minimal pressure drop. The coarse 25-micron rating reflects its role — a chemical-adsorption stage, not a fine particle filter.
Think of it as the best of both worlds for a two-housing system: coconut carbon’s taste performance at GAC’s flow rate. In three-housing systems it runs as the pre-carbon stage — sediment first, CGAC second, and optionally a carbon block as the final polish.
Key benefits
- ✓ Premium coconut-shell activated carbon media
- ✓ Reduces chlorine, bad taste & odor house-wide
- ✓ Helps reduce organic chemicals (VOCs)
- ✓ High flow with low pressure drop — GAC’s specialty
- ✓ Better taste polishing than standard GAC
- ✓ Protects plumbing & downstream filters
Specifications
| Cartridge type |
Coconut shell granular activated carbon — GAC (Big Blue) |
| Nominal size |
10″ × 4.5″ |
| Micron rating (nominal) |
25 micron |
| Media |
Premium coconut-shell activated carbon; polypropylene core & shell |
| Recommended position |
Pre-carbon stage — after sediment, before a carbon block (typically Stage 2) |
| Operating temperature |
40 °F – 100 °F (cold water use) |
| Max pressure |
90 PSI |
| Typical life |
3–12 months (varies with water quality & usage) |
| Brand |
MyWaterClub (made for MyWaterClub) |
| SKU |
CGAC-10BB |
Helps reduce
What this cartridge targets — and what it isn’t built for.
Chlorine
Bad taste
Odor
Organic chemicals (VOCs)
Fine sediment
Chloramine
Iron / H₂S
Scale / hardness
Which 10″×4.5″ cartridge do I need?
The MyWaterClub Big Blue 10″×4.5″ range by stage. Your current filter is highlighted.
| Cartridge |
Type |
Best for |
| Stage 1 — Sediment |
| SED5-10BB |
Melt-blown sediment 5 µm |
Whole-house pre-filtration · municipal or moderate sediment |
| Carbon stages — high flow (GAC) |
| GAC-10BB |
Granular activated carbon · 25 µm |
High-flow chlorine, taste & VOC reduction — best value |
| CGAC-10BB (this filter) |
Coconut shell GAC · 25 µm |
Premium taste & VOC reduction at full GAC flow |
| Carbon stages — fine polishing (block) |
| CTO-10BB |
Carbon block (CTO) · 10 µm |
Everyday chlorine, taste & odor polishing — best value |
| CACB-10BB |
Premium coconut carbon block · 10 µm |
Best taste & odor polishing · longest carbon life (6–12 mo) |
| Specialty media |
| Bone Char 10BB |
Bone char carbon |
Helps reduce fluoride (plus taste & odor) |
| IRON-10BB |
Iron-removal + softening resin |
Clear-water (dissolved) iron · light softening |
| SCALE-10BB |
Scale-inhibitor media |
Scale protection for heaters & appliances (does not remove hardness) |
Good to know before you buy
Coconut GAC vs. standard GAC. Both flow freely and reduce chlorine. Coconut carbon’s finer micropore structure adsorbs small taste- and odor-causing organics more effectively — if you’re choosing GAC for drinking-water taste, this is the upgrade. If you just want bulk chlorine knockdown at the lowest cost, GAC-10BB does the job.
GAC vs. carbon block. A granular bed gives you maximum flow; a block (CTO / CACB) gives you finer 10-micron filtration and polishing. Best of both: run this cartridge ahead of a block in a 3-stage system.
Sediment first, flush on install. Keep SED5-10BB ahead of any carbon stage, and run new GAC to drain for a few minutes until the harmless carbon fines clear.
Building a full stack?
Premium 3-stage whole house
SED5-10BB → CGAC-10BB → CACB-10BB coconut block
High-flow 2-stage, best taste
SED5-10BB (Stage 1) + CGAC-10BB
Budget-first alternative
GAC-10BB standard granular carbon — same flow, best value
Well water with iron or scale
Add IRON-10BB or SCALE-10BB after the sediment stage
Please note: Filter life and reduction performance depend on your water chemistry, pressure, and usage, so results vary from home to home. This product is not certified to treat water of unknown quality and is not a substitute for testing your water. Descriptions use general, qualified language and are not health claims. When in doubt, test your water or ask us and we’ll help you build the right stack.
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