The MATRIKX 20" Jumbo Carbon Block Water Filter Cartridge is the highest-capacity option in the MATRIKX CTO range, designed for 20" Jumbo / Big Blue housings and high-demand water filtration systems.

Choose the 5 Micron CTO for high-flow chlorine, taste, odour, PFAS and chloramine reduction, or choose the 1 Micron CTO Plus for finer filtration with the added benefit of VOC reduction.

The combination of 20" length and 4.5" Jumbo diameter provides a large volume of carbon media, delivering exceptional treatment capacity and long service life between cartridge changes.

Select 5 Micron CTO or 1 Micron CTO Plus using the dropdown above.

Product Options

Actual cartridge life and treatment performance depend on incoming water quality, contaminant levels, flow rate and system design.

5 Micron — MATRIKX CTO

The MATRIKX CTO 5 Micron 20" Jumbo Carbon Block Cartridge is designed for large whole-house systems where high flow and high treatment capacity are priorities.

It reduces:

• Chlorine
• Unpleasant taste
• Odour
• PFAS
• Chloramine
• Fine particulate matter

With more than 193,000 litres of chlorine reduction capacity at 26.6 L/min, the CTO provides substantial carbon treatment capacity for larger homes, farms and high-demand installations.

Its 5 micron nominal rating provides effective particulate filtration while maintaining strong flow characteristics.

MATRIKX CTO Key Specifications

Part Number: 32-450-20-MATRIKX
Size: 20" Jumbo
Micron Rating: 5 micron nominal
Media: 100% Coconut Shell Activated Carbon
Chlorine Capacity: >193,000 L @ 26.6 L/min
PFAS Capacity: >73,800 L @ 11.4 L/min
Chloramine Capacity: >22,800 L @ 11.4 L/min
Pressure Drop: 7 psid @ 7 gpm

1 Micron — MATRIKX CTO Plus

The MATRIKX CTO Plus 1 Micron 20" Jumbo Carbon Block Cartridge combines fine particulate filtration with extremely high carbon treatment capacity.

It reduces:

• Chlorine
• Unpleasant taste
• Odour
• PFAS
• Chloramine
• VOCs
• Fine particulate matter

With more than 912,000 litres of chlorine reduction capacity at 26.6 L/min, the CTO Plus is the highest-capacity carbon block option in this MATRIKX range.

Its 1 micron nominal rating provides finer filtration than the standard CTO, while the added VOC reduction makes it well suited to applications requiring broader contaminant treatment.

MATRIKX CTO Plus Key Specifications

Part Number: 01-450-20-MATRIKX
Size: 20" Jumbo
Micron Rating: 1 micron nominal
Media: 100% Coconut Shell Activated Carbon
Chlorine Capacity: >912,000 L @ 26.6 L/min
PFAS Capacity: >79,400 L @ 11.4 L/min
Chloramine Capacity: >45,500 L @ 11.4 L/min
VOC Capacity: >17,000 L @ 7.6 L/min
Pressure Drop: 7 psid @ 7 gpm

What Does This Carbon Block Filter Do?

The MATRIKX CTO range combines activated carbon treatment with particulate filtration.

Chlorine, Taste & Odour Reduction

The coconut shell activated carbon adsorbs chlorine and compounds responsible for unpleasant tastes and odours.

Both the CTO and CTO Plus provide high-capacity chlorine, taste and odour reduction.

PFAS Reduction

Both options provide PFAS reduction.

The 5 micron CTO provides more than 73,800 litres at 11.4 L/min, while the 1 micron CTO Plus provides more than 79,400 litres at 11.4 L/min.

These capacities are based on >95% reduction at 1500 ppt under the stated test conditions.

Chloramine Reduction

Both cartridges reduce chloramine.

The CTO provides more than 22,800 litres at 11.4 L/min, while the CTO Plus provides more than 45,500 litres at 11.4 L/min.

VOC Reduction — CTO Plus

The 1 Micron CTO Plus adds VOC reduction.

It provides more than 17,000 litres of VOC reduction capacity at 7.6 L/min.

If VOC reduction is required, choose the CTO Plus.

Why Choose the 20" Jumbo Size?

The 20" × 4.5" Jumbo format provides the greatest carbon media volume in this MATRIKX cartridge range.

That added media delivers:

• Very high treatment capacity
• Long service life between replacements
• Strong suitability for whole-house filtration
• High-flow performance
• Reduced maintenance frequency
• Better suitability for larger households
• Better suitability for farms and commercial applications

Compared with the 10" Jumbo format, the 20" Jumbo provides substantially more carbon media and greater overall treatment capacity.

Why Choose MATRIKX CTO?

• Premium carbon block filtration
• 100% coconut shell activated carbon
• Renewable carbon source
• Reduces chlorine
• Improves unpleasant taste and odour
• PFAS reduction
• Chloramine reduction
• Choice of 5 or 1 micron nominal filtration
• CTO Plus provides VOC reduction
• Fits compatible 20" Jumbo / Big Blue open-sump housings
• NSF/ANSI 42 and WQA Standard 42 material-safety certification
• WQA S-803 sustainability certification
• Manufactured in an ISO 9001 and ISO 14001 certified facility
• California Proposition 65 compliant

5 Micron vs 1 Micron — Which Should I Choose?

Choose 5 Micron CTO if:

You want:

• 5 micron nominal filtration
• Chlorine reduction
• Taste and odour improvement
• PFAS reduction
• Chloramine reduction
• High flow
• High-capacity whole-house treatment
• A strong option for larger homes, farms and main-line filtration

The CTO is an excellent choice where high flow and broad carbon treatment are the main priorities.

Choose 1 Micron CTO Plus if:

You want:

• Finer 1 micron nominal filtration
• Chlorine reduction
• Taste and odour improvement
• PFAS reduction
• Chloramine reduction
• VOC reduction
• Exceptionally high chlorine treatment capacity
• Finer particulate filtration

The CTO Plus is suited to applications where maximum treatment capacity and broader contaminant reduction are required.

Product Specifications

Sustainable Coconut Shell Carbon

Both cartridges use 100% coconut shell activated carbon.

Coconut shell is a renewable source material and provides the high surface area required for effective adsorption within the carbon block.

The cartridges also carry WQA S-803 sustainability certification and are manufactured in an ISO 9001 and ISO 14001 certified facility.

Best Suited For

These cartridges are well suited to:

• Large whole-house water filtration systems
• Main water line filtration
• Large homes
• Farms
• Commercial applications
• High-demand drinking-water systems
• Chlorinated water
• Chloraminated water
• PFAS reduction
• Taste and odour improvement
• Fine particulate filtration
• VOC reduction with the CTO Plus
• Compatible 20" Jumbo / Big Blue housings

Important Water Quality Requirement

These cartridges are designed for use with microbiologically safe and adequately disinfected water.

They are not a disinfection device and should not be relied upon to make microbiologically unsafe water safe to drink.

Tank, bore and other untreated supplies may require appropriate disinfection such as UV treatment depending on incoming water quality and intended use.

Certifications

The MATRIKX CTO range includes:

• NSF/ANSI 42 material-safety certification
• WQA Standard 42 material-safety certification
• WQA S-803 sustainability certification
• Manufacture in an ISO 9001 certified facility
• Manufacture in an ISO 14001 certified facility
• California Proposition 65 compliance

The NSF/ANSI 42 and WQA Standard 42 certifications referenced here apply to material safety, rather than certification of the individual contaminant-reduction capacities listed above.

Installation

These cartridges fit compatible 20" Jumbo / Big Blue open-sump filter housings.

To replace the cartridge:

1. Turn off the water supply.
2. Release pressure from the filter housing.
3. Unscrew and remove the housing sump.
4. Remove the existing cartridge.
5. Clean the housing as required.
6. Check that the housing O-ring is clean and correctly seated.
7. Install the selected MATRIKX cartridge.
8. Reassemble the housing.
9. Slowly restore the water supply.
10. Check carefully for leaks.
11. Flush the new cartridge before drinking the water.

Maintenance & Replacement

Cartridge life depends on:

• Incoming water quality
• Water consumption
• Chlorine concentration
• Chloramine concentration
• PFAS concentration
• VOC concentration where applicable
• Flow rate
• Particulate loading

The 20" Jumbo format provides the highest treatment capacity in this MATRIKX range, helping extend the interval between cartridge changes.

Use the applicable treatment capacities as a guide and replace the cartridge when performance declines or flow becomes excessively restricted.

What's Included

Your selected option includes:

5 Micron — CTO

1 × MATRIKX CTO 20" Jumbo Carbon Block Water Filter Cartridge
Part Number: 32-450-20-MATRIKX

1 Micron — CTO Plus

1 × MATRIKX CTO Plus 20" Jumbo Carbon Block Water Filter Cartridge
Part Number: 01-450-20-MATRIKX

Frequently Asked Questions

What's the difference between CTO and CTO Plus?

The CTO is a 5 micron nominal carbon block that reduces chlorine, taste, odour, PFAS and chloramine.

The CTO Plus provides finer 1 micron nominal filtration, adds VOC reduction, and provides significantly higher chlorine treatment capacity.

Which option is best for high-demand whole-house filtration?

Both are designed for high-capacity applications.

Choose the 5 Micron CTO where high flow and general chlorine, PFAS and chloramine treatment are the priority.

Choose the 1 Micron CTO Plus where finer filtration, VOC reduction and maximum carbon treatment capacity are required.

Does this filter reduce PFAS?

Yes.

CTO: >73,800 L @ 11.4 L/min
CTO Plus: >79,400 L @ 11.4 L/min

These figures are based on >95% reduction at 1500 ppt under the stated test conditions.

Does it reduce chloramine?

Yes.

CTO: >22,800 L @ 11.4 L/min
CTO Plus: >45,500 L @ 11.4 L/min

Does it reduce chlorine?

Yes.

The CTO provides more than 193,000 litres of chlorine reduction capacity at 26.6 L/min.

The CTO Plus provides more than 912,000 litres at 26.6 L/min.

Does it reduce VOCs?

Choose the 1 Micron CTO Plus if VOC reduction is required.

It provides more than 17,000 litres of VOC reduction capacity at 7.6 L/min.

What is the pressure drop?

Both cartridges have a listed pressure drop of:

7 psid @ 7 gpm

Why choose 20" Jumbo instead of 10" Jumbo?

The 20" cartridge contains substantially more carbon media.

That provides:

• Greater overall treatment capacity
• Longer service life between changes
• Less frequent cartridge replacement
• Better suitability for high-demand systems

For large whole-house systems where reducing maintenance frequency is important, the 20" Jumbo is the stronger option.

Is the carbon made from coconut shell?

Yes. Both cartridges use 100% coconut shell activated carbon.

Will it fit my 20" Big Blue housing?

It fits compatible 20" Jumbo / Big Blue open-sump housings.

The cartridge dimensions are approximately 4½" × 20" (114 × 508mm).

Will it fit a 10" Jumbo housing?

No. This is the 20" Jumbo version.

For a 10" Jumbo housing, use the corresponding MATRIKX 10" Jumbo cartridge.

Can I use it with tank or bore water?

Only where the water is microbiologically safe and adequately disinfected.

These carbon blocks do not provide disinfection.

How often should I replace it?

Replacement depends on incoming water quality, contaminant levels, water consumption and flow rate.

The 20" Jumbo cartridge provides very high capacity, so service intervals can be considerably longer than smaller cartridges under comparable conditions.

Replace it when treatment performance declines or flow becomes excessively restricted.