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2,200-Liter Underground Tank – Compact Rainwater Cistern, Ready for Connection

Durable Tank for Rainwater Harvesting

The cylindrical PE underground tank, with a capacity of 2,200 liters, is designed for the underground storage of rainwater for garden irrigation, cleaning tasks, and suitable household applications. Its compact design makes it ideal for small lots, gardens, and tight installation spaces. The pre-assembled sliding dome can be adjusted in height by 200 mm to match the ground level and tilted up to 5°. The tank is delivered ready for connection with three pre-installed rubber lip seals for DN 100 pipes.

You can determine the appropriate tank size using our rainwater calculator.

Additional product features and benefits

  • Seamlessly manufactured—using a rotational sintering process with a stress-free structure and a permanently leak-tight tank body
  • UV- and corrosion-resistant – polyethylene (PE-LLD) for underground use
  • Walkable cover – with a slip-resistant texture and “Flower of Life” embossing
  • Vehicle-traffic-rated – can be expanded with a vehicle-traffic-rated cover according to the installation instructions
  • Expandable connection surfaces – allow for custom retrofits
  • Cost-effective round design – optimized material usage and reduced excavation for comparable storage volume
  • 25-year warranty – subject to professional installation in accordance with the installation instructions; the warranty certificate (DE) or the warranty certificate (EN) is available for download

Optional features

  • Without accessories – for custom configuration or expansion of your system
  • Inlet settling chamber – guides rainwater calmly into the storage tank, helps fine sediment particles settle, prevents the sediment layer from being stirred up, and supplies oxygen to the water in the tank
  • Tank-mounted filter with inlet settling chamber – filters rainwater inside the tank using a 0.8-mm slotted screen; the filter is suitable for surface drainage areas up to 160 m²
  • Biovitor – biological water treatment without the use of chemicals and with integrated inlet settling

Technical Specifications

Feature Value
Material Polyethylene (PE-LLD)
Volume 2,200 liters
Weight 110 kg
Length 2,130 mm
Width 1,220 mm
Overall height 2,070–2,270 mm, retractable sliding roof
Connections 3 × DN 100 (Ø 110 mm) with rubber lip seals

Installation & Use

Please follow the installation instructions and read all instructions carefully and in full before installation, connection, and commissioning. Safety and installation regulations must be observed to ensure proper installation and safe use.

For round tanks, dig deeper rather than wider. If groundwater or stratum water is present, take appropriate precautions (see installation instructions) or, alternatively, use flat tanks.

For installation beneath areas accessible to passenger vehicles, a cover capable of withstanding vehicle traffic is required. The permissible soil cover depth and installation specifications can be found in the installation instructions.

A warranty or guarantee claim may be voided if the tank was not installed properly in accordance with the installation instructions and the defect is attributable to this improper installation. Check the system regularly for leaks, cleanliness, and stability. Maintenance of the entire system is recommended approximately every five years.

Material & Sustainability

The tank is made of polyethylene (PE-LLD) containing a proportion of recycled material. The material is chemically inert and has no effect on the quality of the stored rainwater. The tank body, manufactured monolithically using the rotational sintering process, is seamless and fully recyclable. GreenLife manufactures the underground tank in Germany. Learn more about sustainability at GreenLife.

Characteristic Value
Material Polyethylene (PE-LLD)
Volume 2,200 liters
Weight 110–120 kg, depending on accessories
Length 2,130 mm
Width 1,220 mm
Tank body height 1,450 mm
Overall height 2,070–2,270 mm, including extendable sliding dome
Connections 3 × DN 100 (Ø 110 mm) with rubber lip seals
Vehicle Accessibility Accessible to passenger cars with a suitable cover; accessible to trucks with a suitable cover (up to a maximum gross vehicle weight of 30) in accordance with the installation instructions
Backfill depth Green area: 400–1,100 mm; passenger car area: 600–1,100 mm; truck area: 600–1,150 mm
Dimension Drawing
Download
Data SheetDownload
Bid SpecificationsDownload
Installation InstructionsDownload

Do You Have Any Questions? We’re Here to Help.

Our customer service team is happy to assist you with any questions regarding product selection, application, installation, or accessories.

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