GRAF

Carat Underground Rainwater Tank

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

Brand

GRAF

Range

Rainwater

Sizes

Lid types

Size

Dimensions: L 2,390 mm · W 2,190 mm · H 2,710 mm

Lid / load class

Selected SKU

10.0008

Price on request

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Upload plans on the quote form for civil sizing, pump station design, or treatment plant PE calculations.

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15-year warrantyManufacturer warranty on the tank body

Easy to transportShips as two half-shells for efficient freight

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 size: 6,500 L (see Carat XL and Carat XXL for larger volumes)

Carat tank body

Seals for shell connection

Technical sizing

Size matrix & SKUs

6 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

Size	Length	Width	Height	Weight	Lid / variant	Load class	Order no.
6,500 L	2,390 mm	2,190 mm	2,710 mm	220 kg	Pedestrian cover	Pedestrian	372027
6,500 L	2,390 mm	2,190 mm	2,710 mm	220 kg	Class B vehicle cover	Class B	372027
6,500 L	2,390 mm	2,190 mm	2,710 mm	220 kg	Class D truck lid	Class D	372027
6,500 L	2,390 mm	2,190 mm	2,710 mm	220 kg	Grated pedestrian	PedestrianGrated	372027
6,500 L	2,390 mm	2,190 mm	2,710 mm	220 kg	Grated Class B	Class BGrated	372027
6,500 L	2,390 mm	2,190 mm	2,710 mm	220 kg	Grated Class D	Class DGrated	372027

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 size: 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 size: 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

(3)

Technical manuals

(1)

Rainwater Storage Tank, Carat RS (Installation and Maintenance)PDF | MNL-020.pdf | Rev 2 | 29/05/2019

BIM / Revit guidance

(1)

BIM/Revit handling guide - CaratBIM guidance PDF

Complete the system

Carat Underground Rainwater Tank — common questions

What sizes does the GRAF Carat underground rainwater tank come in?+

The AU Carat underground rainwater page lists the 6,500 L catalogue size. 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.