GAC KDF cartridge

GAC KDF cartridge

coconut activated carbon and KDF® media for chlorine, heavy metals and iron

The GAC KDF cartridge combines two media in one cartridge: granular activated carbon from coconut shell (GAC) and KDF® media. The carbon removes chlorine and substances that spoil the taste and odour of water. According to the manufacturer, KDF additionally reduces heavy metals, lead and iron. The product is a PurePro UDF cartridge, size 10″ × 2.5″, with a nominal rating of 1 micron.

The cartridge is designed for under-sink filters, kitchen water systems and reverse osmosis systems. Use it as a pre-filter or as the final stage; with reverse osmosis, use it together with a sediment cartridge that protects the membrane from particles. It suits households, catering, and commercial and industrial use, including taps, water coolers and coffee machines.

GAC KDF cartridge

How does it work and where does it sit in the filtration chain?

Water flows through a layer of granular carbon and KDF® media. Chlorine and organic substances bind to the carbon (adsorption), while KDF® is a copper-zinc alloy that converts chlorine and reduces heavy metals through a redox reaction. According to the manufacturer the media is bacteriostatic, which means it limits bacterial growth inside the cartridge. According to the manufacturer, the cartridge does not release carbon particles into the water.

Granular carbon (GAC) differs from a carbon block (CTO carbon block 5 micron) in its structure, but the purpose is similar. The GAC KDF cartridge has the advantage for water that contains heavy metals or iron. The cartridge does not remove dissolved salts and is not intended for disinfecting water.

Advantages: GAC KDF cartridge

• Two media in one: coconut activated carbon (GAC) and KDF®
• Removes chlorine and improves the taste and odour of water
• According to the manufacturer, it reduces heavy metals (lead) and iron
• Bacteriostatic: limits bacterial growth inside the cartridge
• No release of carbon particles into the water
• Standard size 10″ × 2.5″ (254 × 64 mm)
• Operating temperature up to 45 °C
• Affordable price: €14.90

Use: GAC KDF cartridge

Where to install it and what to use with it

Install the GAC KDF cartridge after the sediment cartridge. If the water carries a lot of particles, install a 5 micron sediment cartridge or 1 micron first. You can use it as the carbon stage or alongside a carbon block.

The most common combinations:

• PurePro CTO Carbon Block 5 micron for chlorine, taste and odour
• Filter cartridge set for ROEC105 P PurePro (5 micron, CTO and 1 micron in one set)
• PurePro annual cartridge set with all the stages for replacement
• PurePro reverse osmosis

For whole-house filters with a Big Blue housing, where the cartridge diameter is 4½″, see the GAC + KDF activated carbon filter 10BB. You will find other cartridges in the category individual cartridges for water filters.

Replacement: GAC KDF cartridge

When to replace the cartridge

Replace the cartridge after 5,800 litres of water or every 6 months, whichever comes first, depending on water quality. After that period the cartridge no longer retains chlorine and metals sufficiently. Before replacing, shut off the water supply, and afterwards flush the system for a few minutes according to the system manufacturer’s instructions. In reverse osmosis systems it makes sense to replace the cartridges at the same time.

Technical specifications: GAC KDF cartridge

• Designation: PurePro UDF GAC + KDF® cartridge
• Media: granular coconut activated carbon and KDF®, in a polypropylene housing
• Nominal filtration: 1 micron
• Size: 10″ × 2.5″ (254 × 64 mm)
• Maximum operating temperature: 45 °C
• Replacement: after 5,800 L of water or every 6 months
• Use: under-sink filters and reverse osmosis systems, households, catering, commercial and industrial use
• Pre-filter, final filter, or together with a 5 micron sediment cartridge

If you are looking for a GAC KDF cartridge to remove chlorine, heavy metals and iron, the PurePro UDF 10″ × 2.5″ cartridge is a simple and affordable choice. Also see our other water filters and reverse osmosis water filters.