20 inch Big Blue CTO Carbon Block Water Filter

R210,00 Incl. VAT

A high-performance 20 inch Big Blue CTO carbon block filter that reduces chlorine, taste, odor, and organic chemicals. Designed for use in whole-house and pre-reverse-osmosis water filtration systems. Compatible with all standard 20″ Big Blue housings.

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20 Inch Big Blue CTO Carbon Block Water Filter – Features & Benefits

The 20 inch Big Blue CTO (Chlorine, Taste, Odor) Carbon Block Filter is engineered for effective reduction of chlorine, taste, odors, and various organic contaminants in drinking water. Constructed from activated carbon compressed into a dense block, this filter delivers high contact time and superior adsorption compared to granular carbon. Its Big Blue (4.5″ diameter) size provides increased surface area and dirt-holding capacity, making it ideal for whole-house, commercial, and pre-reverse-osmosis applications. Compatible with all standard 20″ Big Blue housings, the CTO carbon block filter helps protect downstream systems and enhances overall water quality. Replace regularly for consistent performance.

Sizing Guide

Whole House Systems: 20″ Big Blue CTO blocks are excellent where chlorine taste/odor is a priority post-sediment stage.
Pre-RO Stage: Use after a sediment filter to prevent carbon fouling.
Flow Considerations: Big Blue cartridges support higher flow rates with lower pressure drop compared with 10″ cartridges.

Timing Recommendations

Water Quality	Change Interval
Light use, low chlorine	~9–12 months
Moderate use/municipal chlorine	~6–9 months
Heavy use/strong odor	~4–6 months

Features An 20 Inch Big Blue CTO Carbon Block Filter:

5um filtration
Highly effective filtration of water for certain VOC’S, chlorine, taste, and odour.
Low-pressure drop. High-pressure performance.
Extra dust holding capacity.
Greater solids holding capacity.
No leaching carbon ash.

WARNING!

For drinking water applications only. Do not use where the water is microbiologically unsafe or with water of unknown quality without adequate disinfection before or after the unit. This filter will not disinfect water.

Weight	3 kg
Dimensions	51 × 11 × 11 cm

Specifications

Specification	Detail
Product Type	20 inch Big Blue CTO Carbon Block Filter
Filter Media	Activated carbon (block)
CTO Rating	Chlorine, taste, odor reduction
Length	~20 inch (≈50.8 cm)
Outer Diameter	~4.5 inch (≈11.5 cm)
Inner Diameter	Standard Big Blue core
Weight	~0.8–1.2 kg (varies by brand)
Compatibility	Standard 20″ Big Blue housings
Operating Temp.	Typically up to ~38–65 °C
Rated Capacity	Varies by model / water quality
Typical Change Interval	6–12 months (depends on use)
Reduces	Chlorine, taste, odor, organics
Does NOT Remove	Microorganisms (requires dedicated media)

Pros & Cons

✔ Pros

Effective chlorine & odor reduction: Dense carbon block media for cleaner, better-tasting water.
Improved water quality: Reduces taste and smell issues common in municipal water.
High capacity: Big Blue format allows longer life and higher flow.
Protects downstream systems: Improves life of RO membranes and other filters.

✘ Cons

Not a microbiological filter: Doesn’t remove bacteria/viruses.
Needs periodic replacement: Performance decreases as carbon fills.
Pressure drop at end of life: May reduce flow when saturated.

FAQ's

1: What does “CTO” mean?

CTO stands for Chlorine, Taste, Odor — indicating the filter targets chlorine removal and improves flavor and smell.

2: How often should this filter be replaced?

Typically every 6–12 months, depending on water usage and quality.

3: Is it compatible with my system?

Yes — it fits standard 20″ Big Blue housings used in many whole-house and RO systems.

4: Will it remove bacteria?

No — carbon block filters reduce chemical contaminants and improve taste/odor; for microbes, use additional filtration (e.g., UV, UF, RO).

5. What are Big Blue filter cartridges?

Big Blue filter cartridges are large‑capacity water filters designed for whole‑house and commercial water filtration systems. They fit Big Blue housings and effectively remove sediments, chlorine, rust, and other impurities from your water supply.

6. What sizes of Big Blue cartridges are available?

Big Blue cartridges typically come in standard sizes such as 20‑inch and 10‑inch lengths, with different micron ratings to suit your water quality needs. Check product details to choose the correct size for your system.

7. What micron ratings do Big Blue cartridges come in?

Big Blue cartridges are available in a range of micron ratings — from coarse filters (e.g., 5 µm) for sediment removal to finer filters (e.g., 1 µm) for finer particulates. Choose the rating based on your water quality and filtration requirements.

8. What do Big Blue cartridges filter out?

Depending on the cartridge type, Big Blue filters can remove:

Sediments like sand, silt, and rust
Chlorine and chemical tastes/odours (carbon cartridges)
Scale and particulates that affect appliances and plumbing

9. How often should I replace Big Blue filter cartridges?

Replacement frequency depends on water quality and usage but typically ranges every 3–6 months. Heavily sedimented water may require more frequent changes. Always follow manufacturer recommendations.

10. How do I install a Big Blue filter cartridge?

Turn off the water supply to the filter housing.
Relieve pressure by opening a nearby tap.
Remove the housing and old cartridge.
Insert the new Big Blue cartridge, ensuring correct orientation.
Reassemble and turn the water back on.
Always follow the installation instructions provided with your filter housing.

11. Can Big Blue cartridges improve water taste and odour?

Yes — activated carbon Big Blue cartridges are specifically designed to reduce chlorine taste and odour, giving you cleaner and better‑tasting water.

12. Are Big Blue cartridges compatible with my filter system?

Big Blue cartridges fit standard Big Blue housings (typically 4.5” diameter). Check your housing size and cartridge length before purchasing to ensure compatibility.