GRAF Carat 2700L poly septic tank
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GRAF Carat 2700L Septic Tank

The compact tank. Sized for up to 4 inhabitants in a single SmartShift studio, pod or expander. Dual-chambered design with internal baffle, telescopic lid that tilts for fall, and a 100% recycled polyethylene body light enough to drop in without a crane.

From $3,244
2,700 L
Total capacity
4
Inhabitants
2080 mm
Length
2010 mm
Height
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Full specifications

Full specs, dimensions and compliance.

Capacity & sizing

Total capacity
2,700 L
Base capacity
2,000 L (4 inhabitants)
Per-extra-person
+500 L
Treatment cycle
~3 days mechanical
Suits household
Up to 4 people

Dimensions & weight

Length
2,080 mm
Height
2,010 mm
Width
1,565 mm
Lid type
Telescopic, tiltable
Install method
Drop-in, no crane required

Build & compliance

Material
Polyethylene (100% recycled)
Standard
AS/NZS 1546.1
Chambers
Dual-chambered with internal baffle
Lid
Telescopic, tiltable
Concrete anchoring
Not required
Driveway-rated
Yes — with optional trafficable lid
Origin
Germany (Otto Graf GmbH)
Warranty
10 years (manufacturer)
What's supplied

Complete tank package.

Supplied as a full GRAF Carat kit, ready to hand to your licensed installer. Optional trafficable lid available if the tank goes under a driveway or driveable surface.

  • GRAF Carat poly septic tank body
  • Internal baffle for dual-chamber separation
  • Telescopic lid (tiltable for fall adjustment)
  • Standard non-trafficable cover
  • Inlet & outlet pipe seals
  • Manufacturer installation guide
  • Free delivery within Perth metro (Alkimos–Mandurah)
Standards & install

Australian-compliant install.

Excavation, ground preparation, plumbing connection and council approval are the installer's responsibility. Standards your installer works to:

  • AS/NZS 1546.1 — On-site domestic wastewater treatment units (Septic tanks)
  • AS/NZS 1547 — On-site domestic wastewater management
  • Local council approval typically required for installation
  • Licensed plumber for connection to building plumbing (AS/NZS 3500)
We deliver the tank to your site (free within Perth metro). Excavation, plumbing connection and council sign-off are arranged by your licensed plumber — ask us for recommended installers in your region.
Get started today

Going off-grid
on a smaller block?

Tell us the household size, soil type and council region — we'll confirm the 2700L is the right pick and send a quote with delivery.

No obligation
Prompt response
Free Perth metro delivery
10 yr manufacturer warranty
Get a free quote Talk to a specialist