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

Sizing

Volume [l]Length [mm]Width [mm]Height [mm]Weight [kg]order no.add to enquiry
12200028600250031604900380551
11600027330250031604610380550
11200026360250031604510380519
10600025090250031604220380518
10200024120250031604120380517
9600022850250031603830380516
9200021880250031603730380515
8600020610250031603440380514
8200019640250031603330380513
7600018370250031603040380512
7200017400250025502940380511
6600016130250031602650380510
6200015160250031602550380509
5600013890250031602260380508
5200012920250031602160380507
4600011650250031601870380506
4200010680250031601770380505
360009410250031601480380504
320008440250031601380380503
260007200250031601100380502
220006230250031601000380501
16000459025003160750380500

calculated size Request for information

Technical details

Installation

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

Accessibility

Earth covering with loading capacity [mm] 800 - 1500
max. axle load [t] 8
max. vehicle weight [t] 40

Groundwater installation

Earth covering with groundwater installation [mm] 800 - 1500
Eintauchtiefe ins Grundwasser bis Tankmitte

General

Warranty period (years) 30

Accessory