CTO Filter Cartridge – High-density Compressed Activated Carbon Filter Cartridge, Safeguarding Water Quality

The CTO filter cartridge (Compressed Activated Carbon Filter Cartridge) is a core filter cartridge widely used in water purification systems. It is made from compressed activated carbon and is typically used as the third-stage filter cartridge in water purifiers. Its primarily function is to adsorb residual chlorine, heavy metal ions, pesticide residues, etc., thereby improving water quality and taste.

Under the same working conditions, UDF filter cartridge has a relatively shorter lifespan and require regular replacement. In contrast, CTO filter cartridge has a longer service life, effectively reducing the frequency of filter replacement.

A white CTO filter cartridge placed on a flat surface

Structure

O-ring: High temperature resistance, good sealing performance.
End cap: Made of polypropylene material, reliably sealed, and durable.
Compressed activated carbon: Made by mixing granular activated carbon powder with an inorganic liquid binder, then placed into a special designed mold, compressed under high pressure with a press, and dried after demolding.
PP non-woven fabric: It filters impurities and sludge, stabilizes the filter cartridge structure.

Structural diagram of the outer and inner layers of the CTO filter cartridge

Features

High-efficiency adsorption. Made of high-density activated carbon material, it offers excellent adsorption capacity and can effectively remove heavy metal ions and chemical residues from water.
Precision filtration. Through a special compression process, a uniform pore structure is formed, which can both adsorb impurities and physically intercept fine particles.
Eco-friendly and durable. Under normal circumstances, the lifespan of the filter cartridge is 6–12 months, with the specific replacement time depending on water quality and usage frequency.
Wide applicability. Universal standard filter cartridges range from 5" to 40" in size, and are suitable for various types of water purification equipment like RO water purifiers.

Specifications

Table 1: CTO Filter Cartridge Specifications
Material	Granular activated carbon or coal-based activated carbon
Type	NORMAL / JUMBO
Height	5" / 10" / 20" / 30" / 40"
Out diameter	2.5" / 4.5"

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