Twin KDF + GAC 20″ × 4.5″ Replacement Filter Pack

Fresh KDF + carbon media. Better-tasting water.

Two matching KDF + granular activated carbon cartridges for your compatible 20″ × 4.5″ setup. Combined media addresses chlorine, unwanted tastes and odours, with KDF also targeting certain dissolved metals.

KDF + carbon media helps reduce chlorine taste and odour.
KDF targets certain dissolved metals in the incoming water.
Two matching 20″ × 4.5″ cartridges supplied together.
FREE shipping Australia-wide

$369.00

Taxes included.

Bought separately: $410.00 −$41.00

Free shipping over $100

Who this pack is for

Refresh the media in your KDF setup.

Use this pair where KDF + carbon cartridges are already specified. Plan around 6–12 months, with earlier checks if taste, odour or flow changes.

Fresher taste

Granular activated carbon works with KDF to reduce chlorine taste and unwanted odours in everyday water.

For water that is more pleasant to use.

Keep water moving

Fresh media can address flow loss caused by a loaded filter. It does not increase the pressure of the incoming supply.

For a compatible setup due for servicing.

What's in the pack

Two matching cartridges. Combined media in each.

Each cartridge contains KDF and granular activated carbon. This pack supplies a matching pair, rather than a sediment–carbon–resin sequence.

Stage 01

2 × KDF + GAC Replacement Cartridge — 20″ × 4.5″

KDF targets chlorine and certain dissolved metals; granular activated carbon helps reduce unwanted tastes and odours.

HFS-F01M-KDF $205.00

Full spec and documents

Individual prices vs this pack

Item Price

2 × KDF + GAC Replacement Cartridge — 20″ × 4.5″ cartridge $410.00

Bought separately $410.00

This pack $369.00

You save $41.00

Measure these two.

Measure the cartridge you're replacing, not its housing.

A Overall length — end to end, including caps or connectors

B Outer diameter — at the widest point of the body

Will it fit?

Match the cartridge and the media specification.

Check that your existing 20″ × 4.5″ system is specified for this KDF + GAC cartridge. Matching dimensions alone does not make different treatment media interchangeable.

20″ × 4.5″ 508 mm × 114.3 mm ← this filter pack 10″ × 4.5″ 254 mm × 114.3 mm 10″ × 2.5″ 254 mm × 63.5 mm Quick-fit twist-off 300 mm × 65 mm Inline, hose fittings 260 mm × 50 mm

Measured it and still not sure?

Send a photo of the cartridge beside a tape measure and we'll tell you which size it is.

Call 0474 189 347 or email sales@homefiltrationsystems.com.

Contact us

Nominal sizes vary a little between makers, so match the measurement rather than the label. What we can't tell you is how ours compares to a cartridge we didn't make and haven't tested, or whether a replacement affects your housing's own warranty; that one is between you and its manufacturer.

Fitting it, what comes out, and when it's due again

Cartridge installation & replacement guide

Download the replacement guide (PDF)

Need help with the change? Call 0474 189 347.

What happens, in order

Turn off & release pressureShut off the supply and release pressure through a downstream tap or the relief button, if fitted.
Remove & cleanRemove the old cartridges, wash and rinse the bowls, and inspect the seals. Replace damaged O-rings.
Fit the replacementsSeat the correct cartridges centrally in their housings. Refit the bowls firmly by hand without overtightening.
Flush & checkRestore supply slowly with a downstream tap open. Follow the stated flushing time, then check housings and connections for leaks.

Reviews

What people who fitted it said.

Only buyers we can match to an order can leave one, so the count is lower than it would be otherwise.

FAQ

Questions about this replacement pack?

A few practical answers before you order or change your filters.

Talk to someone

Need help choosing? Call 0474 189 347.

Compare the actual dimensions, end caps, openings and seals with your existing HFS-F01M-KDF or confirmed equivalent. Check that the system is designed for KDF + GAC media before substituting it for another cartridge type.

Plan around the pack’s 6–12 month guidance, with earlier checks if taste, odour or flow changes. Water quality and the contaminants being treated affect service life.

The pack supplies two matching KDF+GAC cartridges. Use them as required by your existing setup; buying a pair does not mean they must both be changed on the same date.

This pair does not include an ion-exchange resin stage. Choose a suitable resin or softening option if hardness and scale are the main problem, and check compatibility with your existing system.

Follow your system’s isolation, pressure-release, fitting and flushing instructions. If you cannot isolate it safely or are unsure, arrange help from HFS or a qualified plumber.

Contact HFS before fitting or using the pack. Match dimensions, connectors and filtration purpose, and check your housing manufacturer’s warranty terms before using another brand.