Rainwater tank filters in Australia: match the package to Carat or Platin

Most underground reuse systems need a rainwater tank filter with the tank. GRAF matches filter packages to the tank family: Optimax / Compact style packages with Carat, Minimax-style with Platin. Quote the filter with the tank so AU sales can confirm roof area and fittings.

Why the filter belongs in the tank quote

A rainwater tank filter removes leaves and coarse debris before storage, which protects water quality and pump life. Specifying the filter later often forces retrofit fittings and extra site visits.

Carat systems: Optimax and related packages

Pair AU Carat underground rainwater (6,500 L Carat S; Carat XL 8,500 / 10,000 L) with Carat Optimax or basket / Compact style filter packages listed on the rainwater range. Confirm maximum roof area on the filter PDP (Optimax packages commonly cite up to 350 m2 roof where stated).

Platin systems: Minimax-style packages

Platin flat underground tanks (1,500 / 3,000 / 5,000 / 7,500 L) pair with Platin Minimax-style filter packages. Use Platin when dig depth is constrained; keep the filter family matched to the tank.

Not an OSD or pump-station filter

These packages support rainwater harvesting tanks. OSD detention, EcoBloc and pump station briefs use different pretreatment and chamber designs. Confirm the planning condition before you lock a filter family.

How to quote through GRAF Australia

Send roof m2, tank preference (Carat or Platin), postcode and reuse intent via grafaustralia.com.au or call 1300 131 971.

Comparison

Rainwater tank filter package match (catalogue families)

	Carat path	Platin path
Tank cue	Carat S rainwater 6,500 L (+ XL 8,500 / 10,000 L)	Platin 1,500 · 3,000 · 5,000 · 7,500 L
Filter family	Optimax / Compact / basket packages	Minimax-style packages
Quote with	Tank + lid + filter + pump as required	Tank + lid + filter + pump as required

FAQ

Do I need a rainwater tank filter with an underground tank?+

Yes for most reuse systems. Specify inlet filtration with the Carat or Platin package.

Can I put a Platin Minimax on a Carat tank?+

Quote GRAF Australia before mixing families. Catalogue packages are matched to tank platforms for fittings and roof-area guidance.

Keep reading

Need a GRAF Australia quote?

Call 1300 131 971 or send site details for sizing and supply.

Request a quote