Trevoli 20KDF-GAC 20" Jumbo GAC + KDF Carbon Filter - Mains Water NZ

Trevoli 20KDF-GAC — 20" Jumbo GAC + KDF Carbon Filter

Reduce chlorine, heavy metals, iron, and hydrogen sulfide from mains water — 20" Jumbo size.

The Trevoli 20KDF-GAC is a 20" x 4.5" Jumbo cartridge combining granular activated carbon (GAC) with KDF media. The GAC reduces taste, odour, and chlorine. The KDF media works to reduce or remove heavy metals, iron, hydrogen sulfide, and chlorine — prolonging the life of the carbon and increasing its overall effectiveness.

The 20" length holds more media than the 10" 10KDF-GAC — providing a longer service life between replacements. A better choice for larger households, higher-usage installations, or where longer service intervals are preferred.

This cartridge is designed for chlorinated mains water only. KDF media is not suited to unchlorinated supplies such as rainwater or tank water — for those applications, use the standard GAC20B instead.

Polypropylene sediment filtration pads at each end keep the media contained and provide additional coarse filtration.

This cartridge is replace-only — it is not cleanable or reusable. Replace every 6–12 months or sooner if taste or odour returns.

Fits most 20" Jumbo (Big Blue or Big White) housings — including Pentair, Puretec, Davey, and most other major brands. Jumbo housings take a 4.5" diameter cartridge.

Key Specs at a Glance

• Media: Granular activated carbon + KDF
• Size: 20" x 4.5" (Jumbo)
• Water source: Chlorinated mains water only
• Cleanable and reusable: No — replace only
• Replace: Every 6–12 months, or when taste or odour returns
• Certifications: None
• Fits: Most 20" Jumbo (Big Blue / Big White) housings

Frequently Asked Questions

What does KDF do?

KDF (Kinetic Degradation Fluxion) is a copper-zinc alloy media that works to reduce or remove heavy metals, iron, hydrogen sulfide, and chlorine through an electrochemical process. Combined with GAC, it extends the life of the carbon and improves overall filtration effectiveness.

Can I use this on rainwater or tank water?

No. The KDF media in this cartridge is designed for chlorinated mains water only. For rainwater, tank water, or any unchlorinated supply, use the standard GAC20B instead.

What is the difference between the 20KDF-GAC and the GAC20B?

Both are 20" Jumbo GAC cartridges. The 20KDF-GAC adds KDF media for additional reduction of heavy metals, iron, and hydrogen sulfide — and extends the effective life of the carbon. It is suited to mains water only. The GAC20B is suitable for a wider range of water sources.

What is the difference between the 10KDF-GAC and the 20KDF-GAC?

Both use the same GAC + KDF media combination and are suitable for mains water only. The 20" version holds more media, which extends service life and increases contact time. Choose the 20" for larger households or higher-usage installations.

Can I clean and reuse this cartridge?

No. This cartridge is replace-only — the media is consumed during use and cannot be regenerated or cleaned. Replace every 6–12 months or when taste or odour returns.

Will it fit my housing?

This cartridge fits most 20" Jumbo housings — the key measurement is diameter. Jumbo housings take a 4.5" diameter cartridge. If your housing takes a 2.5" diameter cartridge, you need the Standard size, not this one.

What warranty applies?

Filter cartridges are consumable items. If you receive a cartridge that appears damaged or defective on arrival, get in touch and we'll sort it out.