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 XL retention cistern:
- Suitable for HGV loading up to 12 t
- Dome opening with stainless steel profile for precision fit and secure mounting
- Can be mounted in groundwater
- Lower weight than concrete and steel
- Various connection surfaces DN 100 (4") / 150 (6")
- Investment security thanks to a 15 year warranty
Advantages
Thought-out in every detail
Tank installation made easy! The significantly lower weight of GRAF products compared to steel or concrete cisterns makes transport and installation easier.
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.
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 for high fitting accuracy and mounting safety.
Flexible connections possible according to customer requirements on the tank dome up to DN 300 or on the end face up to DN 250.
Tank installation made easy! The significantly lower weight of GRAF products compared to steel or concrete cisterns makes transport and installation easier.
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.
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 for high fitting accuracy and mounting safety.
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 |
|---|---|---|---|---|---|---|
| 8500 | 3500 | 2040 | 2695 | 380 | 370523 | |
| 10000 | 3520 | 2240 | 2895 | 455 | 370525 |
calculated size Request for information
