What is a Carbon Block (CTO) Filter? What Does It Do?

The block carbon filter is a filtration device used in water purification systems that effectively removes chlorine, bad taste, unpleasant odors, and certain contaminants from water. The term "CTO filter" stands for "Chlorine, Taste, and Odor." For more detailed information and product review, you can check our open housing block carbon filter product page.

What Is the Purpose of a Block Carbon (CTO) Filter?

The main functions of block carbon filters in the water purification process are as follows:

• CTO filters quickly remove chlorine from water.
• They eliminate unpleasant odors and tastes.
• They filter heavy metals and organic contaminants.
• They remove chemical substances such as pesticides and herbicides.
• They make water clear and improve drinking water quality.

What Is the Difference Between Block Carbon and CAG Carbon Filters?

• CTO filters have a dense, compact structure, whereas CAG filters have a granular and loose structure.
• Block carbon filters are fine and highly efficient; CAG filters are less efficient but provide faster filtration.
• Water flow through block carbon filters is slower; CAG filters have a higher flow rate.
• Block carbon filters are more durable and require less frequent maintenance.
• Block carbon filters are used in domestic drinking water systems, while CAG filters are generally used in industrial systems.

How Does a Block Carbon Filter Work?

The block carbon filter passes water through the carbon block. The porous structure of the carbon absorbs contaminants in the water (chlorine, heavy metals, chemicals) and large particles. This process improves the taste of water, removes unpleasant odors, and makes it cleaner. The compact structure of the carbon allows water to pass more slowly, enabling more effective filtration.

What Substances Does a Block Carbon Filter Remove?

• Filters chlorine, which causes bad taste and odor.
• Reduces heavy metals such as lead and mercury.
• Removes pesticides, herbicides, and certain industrial chemicals.
• Eliminates unpleasant tastes caused by organic matter.
• Absorbs organic contaminants dissolved in water.
• Reduces the effects of chloramine.

When Should a Block Carbon Filter Be Replaced?

Block carbon filters should typically be replaced every 6–12 months. Additionally, replacement should be done when:

• The water flow slows down compared to before
• The taste or smell of water changes
• The filter's color darkens

How Is a Block Carbon Filter Produced?

Block carbon filters are made from carbon derived from materials such as coconut shells or coal, which are activated by processing at high temperatures. The carbon powder is mixed with water, compressed into a solid block, dried, and hardened. Finally, after passing quality tests, they are made ready for use in water purification devices. To explore more filter models, visit our water filter page.

Frequently Asked Questions

What does a carbon block filter do?

A carbon block filter effectively removes harmful substances such as chlorine, bad taste, and odor from water. It also filters heavy metals and some chemicals.

At what stage is the block carbon filter used?

In water purification systems, the block carbon filter is used in the second stage. The first stage is the sediment filter, followed by the block carbon filter, which removes chlorine, bad taste, odor, and chemicals from water.

What does block carbon do?

The block carbon filter removes chlorine, bad taste, and odor from water. It also filters heavy metals, chemicals, and organic contaminants, making water healthier and better tasting.

What happens if a block carbon filter is not installed?

If a block carbon filter is not installed, chlorine, bad taste, and odor in water cannot be removed. Water quality will decrease, taste and smell will deteriorate, other filters will get dirty faster, and the device's efficiency will drop.