GRAF detention cisterns for rain detention and channel relief.

Detention systems, i.e. rainwater detention, play an important role in the reduction of hydraulic peaks and thus help relieve strain on the public sewer network, particularly in new construction areas. Detention systems usually consist of a volume which is used for the temporary storage of rainwater in the event of heavy rainfall, and a throttling device to limit the draining runoff water. The rainwater is cleaned using a filter before it enters the detention volume in order to avoid compromising the function of the throttling device. The throttled flow of rainfall is fed into the sewer and the excess amount is retained in the detention cistern. This amount accumulates in the detention cistern and is also drained off with the throttled runoff water after the rainfall event. The detention volume is thus discharged and remains available once more as a temporary storage tank for the next rainfall event.

Advantages Carat XXL detention 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
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.

Optionally with second tank dome
Optionally with second tank dome
Optionally with second tank dome

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

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.

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.

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 300.

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.

Dome opening with stainless steel profile

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

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.

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.

Sizing

Volume [l]Length [mm]Width [mm]Height [mm]Weight [kg]order no.add to enquiry
12200029480250031604485380551
11600028125250031604240380550
11200027155250031604140380519
10600025800250031603895380518
10200024830250031603795380517
9600023475250031603550380516
9200022505250031603450380515
8600021150250031603205380514
8200020180250031603105380513
7600018825250031602860380512
7200017855250025502760380511
6600016500250031602515380510
6200015530250031602415380509
5600014175250031602170380508
5200013205250031602070380507
4600011850250031601825380506
4200010880250031601725380505
360009525250031601480380504
320008555250031601380380503
260007200250031601100380502
220006230250031601000380501
16000459025003160750380500

calculated size Request for information

Technical details

Accessibility

Earth covering with loading capacity [mm] 800 - 1500
max. axle load [t] 13.5
max. vehicle weight [t] 40
max. vehicle weight with reinforced concrete slab [t] 60

Groundwater installation

Earth covering with groundwater installation [mm] 800 - 1500

Installation

max. earth covering [mm] (without groundwater, vehicle loading) 1500

Downloads

Accessory