The Carat XL rainwater underground tank has been specially developed for rainwater harvesting. It is available in sizes 8,500 and 10,000 l, vehicle or lorry-bearing (combined with Telescopic dome shaft with cast iron lid or TRUCK).

  • Optimal tank geometry and statics due to CAD product development – equals highest stability
  • Unique fitting accuracy of the components
  • Dome opening with stainless steel profile for precision fit and secure mounting
  • Consistent quality due to constant production monitoring
  • Vehicle or lorry-bearing (combined with Telescopic dome shaft with cast iron lid or TRUCK)
  • Groundwater stable up to the middle of the tank thanks to extremely stable construction
  • Secure investment thanks to the market leading 15-year warranty!
  • Can be expanded as required

Advantages

Thought-out in every detail

Groundwater stable
Groundwater stable
Groundwater stable

The tank can be partially or completely installed in groundwater. Please note the maximum immersion depths and necessary ground covers in the technical data.

Low weight
Low weight
Low weight

Tank installation made easy! The significantly lower weight of GRAF products compared to steel or concrete cisterns makes transport and installation easier.

360° rotatable tank dome
360° rotatable tank dome
360° rotatable tank dome

Allows easy alignment to the connecting pipes. A tank that turns it`s head for you.

Telescopic/Tiltable
Telescopic/Tiltable
Telescopic/Tiltable

The telescopic dome shafts are height-adjustable and can be tilted by 5 degrees. This makes it easy to adapt to the upper edge of the terrain.

Sealed to the top edge of the ground
Sealed to the top edge of the ground
Sealed to the top edge of the ground

The ingress of seepage water can impair the water quality. Our tank and filter solutions are therefore sealed up to the top edge of the ground.

Ready for connection
Ready for connection
Ready for connection

With GARANTIA tank systems, the connection seals are already pre-drilled and lip seals are pre-assembled. This saves time and therefore costs during installation.

Dome opening with stainless steel profile
Dome opening with stainless steel profile
Dome opening with stainless steel profile

Dome opening with stainless steel profile for high fitting accuracy and mounting safety.

Individual connections possible
Individual connections possible
Individual connections possible

Flexible connections possible according to customer requirements on the tank dome up to DN 300 or on the end face up to DN 250.

Groundwater stable

The tank can be partially or completely installed in groundwater. Please note the maximum immersion depths and necessary ground covers in the technical data.

Low weight

Tank installation made easy! The significantly lower weight of GRAF products compared to steel or concrete cisterns makes transport and installation easier.

360° rotatable tank dome

Allows easy alignment to the connecting pipes. A tank that turns it`s head for you.

Telescopic/Tiltable

The telescopic dome shafts are height-adjustable and can be tilted by 5 degrees. This makes it easy to adapt to the upper edge of the terrain.

Sealed to the top edge of the ground

The ingress of seepage water can impair the water quality. Our tank and filter solutions are therefore sealed up to the top edge of the ground.

Ready for connection

With GARANTIA tank systems, the connection seals are already pre-drilled and lip seals are pre-assembled. This saves time and therefore costs during installation.

Dome opening with stainless steel profile

Dome opening with stainless steel profile for high fitting accuracy and mounting safety.

Individual connections possible

Flexible connections possible according to customer requirements on the tank dome up to DN 300 or on the end face up to DN 250.

Sizing

Volume [l]Length [mm]Width [mm]Height [mm]Weight [kg]order no.add to enquiry
8500350020402695380370005
10000352022402895455370006

calculated size Request for information

Technical details

Accessibility

Earth covering with loading capacity [mm] 800-2000
max. axle load [t] 8
max. vehicle weight [t] 12
max. vehicle weight with reinforced concrete slab [t] 60

Groundwater installation

Earth covering with groundwater installation [mm] 800 - 1800

Installation

max. earth covering [mm] (without groundwater, vehicle loading) 2000

Accessory