GRAF detention cisterns for rain detention and channel relief
To guarantee retention of rainwater, a delayed drain is fitted in the channel with 0.05 to 2.0 l/sec. depending on the customer’s specifications. In the event of heavy rainfall, the water level in the cistern rises above this level and is drained into the channel at delayed speed using a floating drain choke. This relieves the channel and the treatment works.
The water level can rise to the emergency overflow and sinks slowly back down again after the rain to the long-term max. water level.
We also construct and supply individual, special solutions.
Sizes between 2,500 – 100,000 l with corresponding retention volumes are possible.
- To retain rainwater and relieve the sewers
- For frost-proof installation in the ground
- "USA Patent 7854338"
Advantages
Thought-out in every detail
The GRAF Carat underground tank is manufactured using a globally unique injection compression moulding process. The result is a top-class product: resilient, precise-fitting and user-friendly!
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.
Tank installation made easy! The significantly lower weight of GRAF products compared to steel or concrete cisterns makes transport and installation easier.
The GRAF Carat underground tank is manufactured using a globally unique injection compression moulding process. The result is a top-class product: resilient, precise-fitting and user-friendly!
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.
Tank installation made easy! The significantly lower weight of GRAF products compared to steel or concrete cisterns makes transport and installation easier.
Sizing
| Volume [l] | Length [mm] | Width [mm] | Height [mm] | Weight [kg] | Retention volume [l] | order no. | add to enquiry |
|---|---|---|---|---|---|---|---|
| 6500 | 2390 | 2190 | 2710 | 220 | 6500 | 370503 | |
| 4800 | 2280 | 1985 | 2430 | 185 | 4800 | 370502 | |
| 3750 | 2280 | 1755 | 2200 | 150 | 3750 | 370501 | |
| 2700 | 2080 | 1565 | 2010 | 120 | 2700 | 370500 |
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