Carat XXL underground tank retention cistern

Carat XXL underground tank retention cistern

webcode: G4306

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The GRAF Retention cistern combines rain retention with rainwater harvesting.

The GRAF retention cistern is a combination of rainwater retention and rainwater harvesting. The detention can be larger if required. In this case, part of the rainwater can also be used in addition to the required detention volume. For example, rainwater can be used for the following applications:

• Watering gardens

• Flushing toilets

• Washing machines

• Cleaning

The use of rainwater means that up to 50 % of drinking water can be saved, and up to 85 % for commercial properties.

The retention cistern is designed such that the rainwater first fills the useage volume. When the useful volume is full, the throttled outflow is activated and the detention volume also becomes available for temporary storage. The detention mechanism with throttled outflow in turn corresponds to a conventional retention system. Following the rainfall event, the position of the outflow prevents the detention cistern from being completely emptied, while the useage volume remains in the tank!

Advantages Carat XXL retention cistern:

Suitable for HGV loading up to 40 t
Can be mounted in groundwater
Dome opening with stainless steel profile for precision fit and secure mounting
Lower weight than concrete and steel
Various connection surfaces DN 100 (4")/150 (6")/200 (8")
Available with DN 300 (12") connection as an option
Available with a second tank dome as an option
102,000 l Volume possible
Investment security thanks to a 15 year warranty

Advantages

Thought-out in every detail

Low weight

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

Optionally with second tank dome

The GRAF XXL tank can optionally be equipped with a second tank dome.

Retention Plus

A combined retention/rainwater utilisation saves up to 50 % drinking water. The water can be used for garden irrigation, cleaning work and in the house also for flushing toilets and washing machines.

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 300.