Otto Graf GmbH
Plastic Products
Tel. +49 7641 589-0
Fax +49 7641 589-50
Carl-Zeiss-Straße 2-6
DE-79331 Teningen, Germany

Platin XL detention cisterns

Detention cistern for rainwater detention and sewer relief

Sizing form/
Tender file
Dimension drawing
Platin XL detention cistern

  • A detention cistern retains the rainwater and drains it into the sewer at a delayed speed.
  • GRAF cistern for rainwater detention and sewer relief.
  • To guarantee retention of rainwater, a delayed drain is fitted in the sewer with a delay of 0.05 to 16 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 sewer at a delayed speed using a floating drain choke. This relieves the sewer and the treatment works. The water level can rise to the emergency overflow and sink slowly back down again after the rain.
  • We also construct and supply individual, special solutions.

Advantages Platin XL flat tank:

  • Rotating tank dome to easily align the connecting lines
  • Available with a second tank dome as an option
  • Suitable for HGV loading up to a vehicle weight of 30 t (66138 lbs)
  • Flexible connection up to DN 300 (12")
  • Connection openings with prefitted DN 150 (6") lip seals
  • Tank height of just 125 cm (4' 1")
  • High-quality, integrated DN 150 (6") filter technology
  • Dome opening with stainless steel profile for precision fit and secure mounting
  • Connection fitting of up to DN 200 (8"), on tank dome of up to DN 300

Scope of supply: 

  • Platin XL flat tank
  • Detention set: floating choke drain, outlet fittings with emergency overflow, DN 100 (4") connection

Not included in the scope of supply:

  • Matching cover
  • Installation of optional Platin XL/XXL detention/retention filter package 2




10,000 l

order no.Length (mm)Width (mm)Height (mm)Weight (kg)add to enquiry
Total volume (l)Retention volume (l)

15,000 l

order no.Length (mm)Width (mm)Height (mm)Weight (kg)add to enquiry
Total volume (l)Retention volume (l)

Technical details

max. earth covering (mm) (without groundwater, vehicle loading)max. axle load (t)max. vehicle weight (t)
Earth covering with loading capacity (mm)Earth covering with groundwater installation (mm)
750 - 1300750 - 1500


Mini telescopic dome shaft with lid, suitable for pedestrian loading


Maxi telescopic dome shaft with lid, suitable for pedestrian loading


Telescopic dome shaft with cast iron lid, suitable for vehicle loading


Telescopic dome shaft TRUCK

Telescopic dome shaft TRUCK for concrete rings




Platin XL/XXL retention package 2

DN 150


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