Rainwater 20″ × 4.5″ Replacement Filter Pack

Less tank sediment. Fresher-tasting water.

Refresh your compatible rainwater system with coarse and fine sediment filtration, followed by 1 micron nano-silver carbon. Carbon improves taste and odour while nano-silver technology helps inhibit bacterial growth in the filter media.

Two sediment stages for coarse and finer particles.
Carbon filtration for fresher taste and less unwanted odour.
Nano-silver antimicrobial technology helps inhibit bacterial growth in the filter media.
FREE shipping Australia-wide

$264.99

Taxes included.

Bought separately: $268.99 −$4.00

Free shipping over $100

Who this pack is for

Refresh the filters your tank water relies on.

Rain can bring fresh sediment into a tank. Replace loaded cartridges to keep filtration working. Plan around 6–12 months, with earlier checks after heavy sediment loads or a change in taste, odour or flow.

Less tank grit

The pleated and polyspun stages catch particles from stored rainwater before they reach the carbon cartridge.

For homes dealing with roof-and-tank sediment.

Fresher taste

The carbon stage helps reduce compounds behind unwanted tastes and odours, making everyday water more pleasant to use.

For the taste and smell you notice every day.

Silver protection

Nano-silver technology helps inhibit bacterial growth within the filter media alongside fine particulate filtration.

For the extra function in your carbon stage.

What's in the pack

Two particle stages. One carbon finishing stage.

Coarse-to-fine sediment filtration prepares the water for the nano-silver carbon cartridge. Replace the supplied set to match your existing rainwater setup.

Stage 01

Pleated Sediment Replacement Filter — 20″ × 4.5″, 5 Micron

The pleated sediment cartridge catches sand, dirt and rust before the finer stages.

HFS-F01M-PL2045 $85.00

Full spec and documents

Stage 02

1 Micron PP Sediment Filter — 20″ × 4.5″

A 1 micron nominal polyspun cartridge adds finer particle filtration.

HFS-PPSD $64.99

Rated for [N] L

Full spec and documents

Stage 03

1 Micron Nano-silver Carbon Block Filter — 20″ × 4.5″

Carbon helps reduce chlorine taste and odour. Its 1 micron rating captures fine particles, while nano silver helps inhibit bacterial growth in the filter media.

HFS-F01M-GAC $119.00

Full spec and documents

Individual prices vs this pack

Item Price

Pleated Sediment Replacement Filter — 20″ × 4.5″, 5 Micron cartridge $85.00

1 Micron PP Sediment Filter — 20″ × 4.5″ cartridge $64.99

1 Micron Nano-silver Carbon Block Filter — 20″ × 4.5″ cartridge $119.00

Bought separately $268.99

This pack $264.99

You save $4.00

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?

20″ × 4.5″ cartridges for a compatible rainwater system.

This is a replacement cartridge pack, not a complete tank-water treatment system. Match all three housings and the existing cartridge interfaces before ordering.

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.

Match three 20″ × 4.5″ housings, their cartridge end fittings and your current rainwater stage arrangement. Send HFS the housing model and cartridge photos if unsure.

Plan around 6–12 months, depending on water quality and use. Check sooner if taste, odour or flow changes. Follow the rating and replacement instructions for your filters.

This pack lets you refresh the supplied set together. Individual stages can load at different rates; follow your system guide when a single cartridge needs earlier attention.

This cartridge pack is not a disinfection system. Rainwater intended for drinking needs appropriate water testing and a treatment setup suited to the results; ask HFS about UV or other disinfection where required.

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.