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Carat Underground Rainwater Tank - GRAF - Rainwater Solutions Australia

GRAF

Carat Underground Rainwater Tank

GRAF Carat underground rainwater tank for Australian house and garden harvesting. Made in Germany, AU sizes 2,700–6,500 L, 15-year warranty. Lid, filter and pump options configured separately. Price on request.

Brand

GRAF

Range

Rainwater

Sizes

4

Lid types

6

Size

Dimensions: L 2,080 mm · W 1,565 mm · H 2,010 mm

Lid / load class

Selected SKU

10.0005

Price on request

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15-year warrantyManufacturer warranty on the tank body
AU Carat sizes2,700 L, 3,750 L, 4,800 L and 6,500 L
Made in GermanyEngineered and manufactured by GRAF
High stabilityGroundwater-stable to mid-tank when installed to guidance

Typical applications

Residential
Commercial
Garden irrigation

Key features

Made in Germany

15-year manufacturer warranty

High stability from controlled production

Easy to transport as two half-shells

Vehicle-bearing when combined with the correct telescopic dome and cast cover

AU catalogue sizes: 2,700 L, 3,750 L, 4,800 L and 6,500 L (see Carat XL and Carat XXL for larger volumes)

Carat tank body

Seals for shell connection

Technical sizing

Size matrix & SKUs

24 technical rows - select above or quote directly

Load class

Pedestrian coverClass B vehicle coverClass D truck lidGrated pedestrianGrated Class BGrated Class D
KeyPedestrianClass BClass DClass BGrated
SizeLengthWidthHeightWeightLid / variantLoad classOrder no.Quote
2,700 L2,080 mm1,565 mm2,010 mm120 kgPedestrian coverPedestrian372024
2,700 L2,080 mm1,565 mm2,010 mm120 kgClass B vehicle coverClass B372024
2,700 L2,080 mm1,565 mm2,010 mm120 kgClass D truck lidClass D372024
2,700 L2,080 mm1,565 mm2,010 mm120 kgGrated pedestrianPedestrianGrated372024
2,700 L2,080 mm1,565 mm2,010 mm120 kgGrated Class BClass BGrated372024
2,700 L2,080 mm1,565 mm2,010 mm120 kgGrated Class DClass DGrated372024
3,750 L2,280 mm1,755 mm2,200 mm150 kgPedestrian coverPedestrian372025
3,750 L2,280 mm1,755 mm2,200 mm150 kgClass B vehicle coverClass B372025
3,750 L2,280 mm1,755 mm2,200 mm150 kgClass D truck lidClass D372025
3,750 L2,280 mm1,755 mm2,200 mm150 kgGrated pedestrianPedestrianGrated372025
3,750 L2,280 mm1,755 mm2,200 mm150 kgGrated Class BClass BGrated372025
3,750 L2,280 mm1,755 mm2,200 mm150 kgGrated Class DClass DGrated372025
4,800 L2,280 mm1,985 mm2,430 mm185 kgPedestrian coverPedestrian372026
4,800 L2,280 mm1,985 mm2,430 mm185 kgClass B vehicle coverClass B372026
4,800 L2,280 mm1,985 mm2,430 mm185 kgClass D truck lidClass D372026
4,800 L2,280 mm1,985 mm2,430 mm185 kgGrated pedestrianPedestrianGrated372026
4,800 L2,280 mm1,985 mm2,430 mm185 kgGrated Class BClass BGrated372026
4,800 L2,280 mm1,985 mm2,430 mm185 kgGrated Class DClass DGrated372026
6,500 L2,390 mm2,190 mm2,710 mm220 kgPedestrian coverPedestrian372027
6,500 L2,390 mm2,190 mm2,710 mm220 kgClass B vehicle coverClass B372027
6,500 L2,390 mm2,190 mm2,710 mm220 kgClass D truck lidClass D372027
6,500 L2,390 mm2,190 mm2,710 mm220 kgGrated pedestrianPedestrianGrated372027
6,500 L2,390 mm2,190 mm2,710 mm220 kgGrated Class BClass BGrated372027
6,500 L2,390 mm2,190 mm2,710 mm220 kgGrated Class DClass DGrated372027

Full specification

Product details

Key construction, installation and performance notes for Carat Underground Rainwater Tank.

Overview

The GRAF Carat underground rainwater tank is the Australian workhorse for house and garden rainwater harvesting. Two half-shells stack for efficient freight, then assemble on site with a patented quick connection, laboratory-tested EPDM profile seals and a centering bolt for accurate, leak-tight fit.

Specification focus

Made in Germany

15-year manufacturer warranty

High stability from controlled production

Easy to transport as two half-shells

Vehicle-bearing when combined with the correct telescopic dome and cast cover

AU catalogue sizes: 2,700 L, 3,750 L, 4,800 L and 6,500 L (see Carat XL and Carat XXL for larger volumes)

Detail 01

Key features

  • Made in Germany
  • 15-year manufacturer warranty
  • High stability from controlled production
  • Easy to transport as two half-shells
  • Vehicle-bearing when combined with the correct telescopic dome and cast cover
  • AU catalogue sizes: 2,700 L, 3,750 L, 4,800 L and 6,500 L (see Carat XL and Carat XXL for larger volumes)

Detail 02

Scope of delivery

  • Carat tank body
  • Seals for shell connection
  • Centering bolt for accurate assembly

Detail 03

Optional accessories

Configure separately: telescopic dome and lid (pedestrian or vehicle), Universal Filter 3 internal, inflow and overflow fittings, and pump package if required. Not supplied on this AU page: international garden extension kits or infiltration tunnel packages.

Detail 04

Easy and safe assembly

Patented quick connection assembles the two half-shells in minutes. EPDM profile seals are laboratory tested. A centering bolt aligns the shells for accurate assembly.

Detail 05

Application

Developed for underground rainwater harvesting on Australian residential and light commercial projects. Configure as a garden or house tank using GRAF filters, lids and interconnection options.

Technical documents

Brochures, drawings, manuals & BIM

Download brochure

Rainwater management brochure

PDF product information for specification and install planning.

Download PDF

Brochures & catalogues

(1)
Rainwater management brochureBrochure PDF

Drawings

(8)
Carat 2700L MaxiPDF | DWG-222.pdf | Rev 1 | 17/05/2016Carat 2700L MiniPDF | DWG-227.pdf | Rev 1 | 17/05/2016Carat 3750L MaxiPDF | DWG-231.pdf | Rev 1 | 17/05/2016Carat 3750L MiniPDF | DWG-235.pdf | Rev 1 | 17/05/2016Carat 4800L MaxiPDF | DWG-239.pdf | Rev 1 | 17/05/2016Carat 4800L MiniPDF | DWG-243.pdf | Rev 1 | 17/05/2016Carat 6500L MaxiPDF | DWG-246.pdf | Rev 1 | 17/05/2016Carat 6500L MiniPDF | DWG-249.pdf | Rev 1 | 17/05/2016

Technical manuals

(1)
Rainwater Storage Tank, Carat S (Installation and Maintenance)PDF | MNL-034.pdf | Rev 2 | 26/08/2022

BIM / Revit guidance

(1)
BIM/Revit handling guide - CaratBIM guidance PDF

GRAF | REUSE

Building a complete commercial reuse system?

GRAF | REUSE can combine storage, filtration, pumping, controls and project-specific treatment around the commercial water requirement.

Explore commercial water reuse

Complete the system

Recommended products and accessories

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Common accessories

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FAQ

Carat Underground Rainwater Tank: common questions

What sizes does the GRAF Carat underground rainwater tank come in?+
The AU Carat underground rainwater page lists 2,700 L, 3,750 L, 4,800 L and 6,500 L. For 8,500 L and 10,000 L see Carat XL underground rainwater; larger volumes are covered by Carat XXL. Confirm lid class and filter package on a quote.
Is Carat suitable for Australian soil and traffic loads?+
Yes when installed to GRAF guidance for cover depth, bedding and load class. Your engineer or installer should confirm local council and geotechnical requirements for the site.
Where do I buy a Carat tank in Australia?+
Through GRAF Australia (grafaustralia.com.au) and authorised trade partners including Reece branches that stock GRAF. Request a quote online or call 1300 131 971 for state-based sales support.
Carat vs Platin: which underground tank should I specify?+
Both are GRAF underground platforms. Carat is the workhorse modular family for many rainwater and detention roles; Platin is often chosen where a flatter profile or specific layout is needed. Share site constraints with GRAF Australia and we will recommend the fit.

Real installations

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Size this product for your project

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