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Graf 2650 Gallon Carat XL Rainwater Retention Cistern

SKU: GRAF-372006 |
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Part Number: GRAF-372006
Capacity: 2650 Gallons
Dimensions: 140"L x 88"W x 90"H
Ships From: Cumming, GA
Product Overview

Graf 2650 Gallon Carat XL Rainwater Retention Cisterns

With Pedestrian Manway, 14" Telescopic Riser and Childproof PE Lid. Supports up to 12 tons of vehicle loading.

The Carat XL rain-water underground tank has been specially developed for rain-water harvesting. 


Unique advantages:

  • Largest and strongest underground PE tank in the world!
  • Supports up to 8 Tons of Axle Weight and 12 Tons Max Total Load
  • Variable burial depth: 32" to 47" (59" Max. with optional dome extension and "Maxi" telescopic riser)
  • Unique in the world! – a global innovation: unique manufacturing process produces the highest stability using latest techniques
  • Unique fit accuracy of the components thanks to new production process
  • Consistent quality due to TÜV safety testing and production monitoring
  • Vehicle-bearing (with telescopic cast iron manway kit)
  • Groundwater stable up to the middle of the tank due to extremely rigid construction
  • Secure investment with market leading 15-year warranty
  • Made from high quality Duralene; easy to recycle
  • Can be expanded as required
  • 31.5" Manway opening


  • The global innovation – the new tank generation of the Carat rainwater underground tanks have been specially developed for rainwater harvesting
  • Frost-proof installation underground
  • Groundwater stable up to the middle of the tank due to extremely rigid construction

The tank that turns its head for you

The GRAF Carat XL underground tank has a rotating tank dome. The tank dome can be aligned with the connections independently of the tank – this makes installation much easier! All installation pipes are connected using the five standard lip seals. The Carat S telescopic dome shaft connects the system to the ground surface. The height of the tank can be smoothly adjusted to suit the local conditions and it can be tilted by 5°. The whole system is flush with ground level.

Part NumberGRAF-372006
Capacity2650 Gallons
Dimensions140"L x 88"W x 90"H
Weight1400 lbs.
ManufacturerGraf Rainharvest Systems
Shipping Info
Shipping FromCumming, GA
Shipping Weight625 lbs.

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