Our premium Big Blue carbon stage: an extruded coconut-shell carbon block that delivers superior chlorine, taste, and odor reduction at whole-house flow — with a long 6–12 month service life.
Stage
Carbon stage · after sediment
Fits
Standard Big Blue housings
What it does
The CACB-10BB is our premium carbon polishing stage for whole-house systems. It’s built from extruded coconut-shell carbon — a denser, higher-purity carbon with a finer pore structure than standard carbon block. That microporosity is what coconut carbon is prized for: strong adsorption of chlorine and the small organic compounds behind off-tastes and odors.
Because the block is extruded as one solid piece, water can’t channel around the media — every gallon gets full carbon contact. The 10-micron nominal rating also captures fine sediment that passes a coarser pre-filter, so it polishes clarity along with taste.
The 10″ × 4.5″ Big Blue format carries enough carbon mass to treat whole-house flow with low pressure drop and a long 6–12 month service life — fewer changes than a standard CTO on the same water. Choose this cartridge when the goal is the best-tasting water at every tap, not just the kitchen.
Key benefits
- ✓ Premium extruded coconut-shell carbon block
- ✓ Effective chlorine & organic compound reduction
- ✓ Noticeably better taste & odor — coconut carbon’s specialty
- ✓ 10-micron fine sediment capture improves clarity
- ✓ Long 6–12 month life — fewer cartridge changes
- ✓ Optimized for whole-house systems — high flow, low pressure drop
Specifications
| Cartridge type |
Premium coconut carbon block CTO (Big Blue) |
| Nominal size |
10″ × 4.5″ |
| Micron rating (nominal) |
10 micron |
| Media |
Extruded coconut-shell activated carbon block; polypropylene core & cage |
| Recommended position |
Carbon stage — after sediment (typically the final stage) |
| Operating temperature |
40 °F – 100 °F (cold water use) |
| Max pressure |
90 PSI |
| Typical life |
6–12 months (varies with water quality & usage) |
| Brand |
MyWaterClub (made for MyWaterClub) |
| SKU |
CACB-10BB |
Helps reduce
What this cartridge targets — and what it isn’t built for.
Chlorine
Bad taste
Odor
Organic compounds
Fine sediment
Chloramine
Iron / H₂S
Scale / hardness
Dissolved solids (TDS)
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 / polishing |
| CTO-10BB |
Carbon block (CTO) |
Everyday chlorine, taste & odor — best value |
| CACB-10BB (this filter) |
Premium coconut carbon block |
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 vs. standard CTO. Both reduce chlorine, taste, and odor. Coconut carbon’s finer micropore structure gives it an edge on taste polishing and small organic compounds, and this cartridge is rated for a longer service life. If you just want dependable chlorine reduction at the lowest cost, the standard CTO-10BB does the job; if taste is the priority, this is the upgrade.
Always run sediment first. Put a sediment cartridge (SED5-10BB) ahead of this one so the carbon spends its life on chlorine and taste, not on dirt.
Chlorine, not chloramine. Coconut carbon block handles chlorine well; chloramine-treated water needs catalytic carbon for effective reduction. Check your utility’s water report if you’re not sure which your city uses.
Building a full stack?
Premium whole-house pairing
SED5-10BB (Stage 1) + CACB-10BB coconut carbon block
Budget-first alternative
CTO-10BB standard carbon block — same job, best value
Hard-water scale protection
Add SCALE-10BB to protect heaters & appliances
Fluoride concern
Add the Bone Char 10BB cartridge after sediment
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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