Media 01
Centaur® XL Catalytic Carbon
Helps reduce chlorine, chloramine, unpleasant taste, unpleasant odor, mild hydrogen-sulfide odor and many common VOCs more effectively than standard activated carbon alone.
10″ x 4.5″ Catalytic Carbon + KDF-85 Water Filter – 25 Micron, Whole House Big Blue Replacement, Reduces Chlorine, Chloramine & Heavy Metals, SKU: CATKDF85-10BB
$59.00
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Description
Premium catalytic carbon + KDF-85 filtration
High-capacity Big Blue cartridge for chloramine, sulfur odor, light iron and selected heavy metals
This 10″ × 4.5″ specialty cartridge combines Centaur® XL catalytic carbon with KDF-85 media. It is designed as a premium upgrade over standard GAC and catalytic-carbon-only filters when broader treatment is needed for chlorine, chloramine, unpleasant odor, light-to-moderate iron concerns and selected dissolved metals.
85% / 15%Catalytic carbon + KDF-85 blend
10″ × 4.5″Big Blue cartridge format
25 micronNominal rating
8–12 GPMListed system-dependent flow
How it works
Dual-media treatment for municipal and selected well-water concerns
The catalytic carbon helps reduce chlorine, chloramine, taste, odor and many common organic compounds. KDF-85 supports redox treatment of selected dissolved metals, helps address light iron and sulfur-odor concerns, and helps inhibit bacterial growth within the filter media.
Media 02
High-Purity KDF-85
Uses an oxidation-reduction process to help reduce selected dissolved metals, support treatment of light iron and sulfur concerns, and limit bacterial growth within the media bed.
Key benefits
The top specialty upgrade over standard GAC and CAT-10BB
Helps Reduce Chlorine and Chloramine
Premium catalytic carbon supports broader chlorine and chloramine treatment than standard GAC.
Enhanced Rotten-Egg Odor Reduction
Helps provide stronger and more consistent treatment of light hydrogen-sulfide odor than standard activated carbon.
Helps Address Light-to-Moderate Iron
May help reduce iron-related taste, odor and discoloration under suitable water conditions.
KDF-85 Redox Treatment
Helps reduce selected dissolved heavy metals through an oxidation-reduction process.
Organic Chemical Adsorption
Helps reduce many common VOCs, solvents and trace organic compounds.
Helps Control Media Fouling
KDF-85 helps inhibit bacterial growth within the filter media; it does not disinfect the source water.
Big Blue Media Capacity
The 10″ × 4.5″ format provides more media and contact capacity than a slim cartridge.
Premium Carbon Upgrade
Best suited when chloramine, sulfur odor, light iron or selected metals are concerns beyond standard carbon treatment.
Reduction guide
What this cartridge helps reduce
Actual performance depends on source-water chemistry, pH, contaminant concentration, pressure, flow rate, contact time and remaining media capacity.
Helps reduce
Chlorine
Chloramine
Unpleasant taste
Unpleasant odor
Mild hydrogen sulfide
Iron-related taste
Iron-related odor
Light iron discoloration
Selected dissolved metals
Many common VOCs
Selected solvents
Chloramine
Unpleasant taste
Unpleasant odor
Mild hydrogen sulfide
Iron-related taste
Iron-related odor
Light iron discoloration
Selected dissolved metals
Many common VOCs
Selected solvents
Performance is strongest when the cartridge is preceded by sediment filtration and operated at a flow rate that provides adequate contact time.
Not a substitute for dedicated treatment
Heavy iron contamination
High hydrogen sulfide
Iron bacteria
Hardness minerals
Fluoride
Microbiological contamination
Dissolved salts / TDS
High hydrogen sulfide
Iron bacteria
Hardness minerals
Fluoride
Microbiological contamination
Dissolved salts / TDS
Strong iron, persistent sulfur odor, iron bacteria, unsafe water or high hardness generally require larger dedicated treatment equipment.
Specifications
Media blend, flow and service guidance
| Product type | Catalytic carbon and KDF-85 specialty cartridge |
|---|---|
| Nominal size | 10″ × 4.5″ Big Blue |
| Filter media | Centaur® XL catalytic carbon + KDF-85 |
| Listed media ratio | Approximately 85% catalytic carbon / 15% KDF-85 |
| Listed KDF-85 quantity | Approximately 1 lb |
| Nominal rating | 25 micron |
| Listed flow rate | Up to approximately 8–12 GPM, depending on system setup |
| Typical service life | Approximately 3–12 months, depending on water quality and use |
| Recommended position | After sediment prefiltration; typically used as the primary specialty carbon stage |
| Housing compatibility | Compatible standard 10″ × 4.5″ Big Blue housings |
| SKU | CATKDF85-10BB |
| Listed shipping dimensions | 10 × 5 × 5 in |
| Listed shipping weight | Approximately 50 oz / 3.125 lb |
Installation and maintenance
- ✓Install a sediment filter upstream whenever suspended particles are present
- ✓Confirm the housing accepts a standard 10″ × 4.5″ Big Blue cartridge
- ✓Operate within the pressure, temperature and flow limits of the complete system
- ✓Pressurize slowly and inspect the housing for leaks after replacement
- ✓Flush carbon fines to drain before normal use
- ✓Replace when taste, odor, chloramine or iron-related performance declines
Which Big Blue carbon cartridge should you choose?
Standard GAC, catalytic carbon or catalytic carbon + KDF-85
GAC
CGAC-10BB
Choose for standard chlorine-related taste and odor treatment when chloramine, sulfur and iron are not primary concerns.
CAT
CAT-10BB
Choose for chloramine and stronger odor treatment when KDF-85 metal treatment is not required.
KDF
CATKDF85-10BB—This Product
Choose for the broadest treatment in this group, including chloramine, sulfur odor, light iron and selected dissolved metals.
BC
Bone Char
Choose a bone-char cartridge instead when fluoride is the primary treatment concern.
Before purchase
Good to know
!
Confirm Big Blue size
This cartridge fits 10″ × 4.5″ Big Blue housings and does not fit standard 10″ × 2.5″ slim housings.
This cartridge fits 10″ × 4.5″ Big Blue housings and does not fit standard 10″ × 2.5″ slim housings.
!
Use sediment prefiltration
Suspended debris can shorten media life and reduce catalytic-carbon and KDF performance.
Suspended debris can shorten media life and reduce catalytic-carbon and KDF performance.
!
Iron performance depends on chemistry
Iron type, concentration, pH, dissolved oxygen and flow rate can significantly affect results.
Iron type, concentration, pH, dissolved oxygen and flow rate can significantly affect results.
!
Not for severe sulfur contamination
Strong or persistent rotten-egg odor may require a larger oxidation and backwashing filtration system.
Strong or persistent rotten-egg odor may require a larger oxidation and backwashing filtration system.
!
Not a disinfectant
KDF-85 may inhibit growth within the media but does not make microbiologically unsafe water safe to drink.
KDF-85 may inhibit growth within the media but does not make microbiologically unsafe water safe to drink.
!
Flow rate matters
Excessive flow reduces contact time and may lower chloramine, odor, iron and metal-treatment performance.
Excessive flow reduces contact time and may lower chloramine, odor, iron and metal-treatment performance.
This product includes one replacement cartridge only. Filter housing, wrench, mounting hardware, plumbing fittings and additional filters are not included. Treatment performance varies with water chemistry and operating conditions. This cartridge does not significantly reduce hardness or TDS and is not intended to make unsafe water potable.
Not sure whether CATKDF85-10BB is the right specialty cartridge?
Send your water source, ZIP code, recent water report and current filtration-system details.
Send your water source, ZIP code, recent water report and current filtration-system details.
Additional information
| Weight | 50 oz |
|---|---|
| Dimensions | 10 × 5 × 5 in |
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