Underground Tanks from 1,000 to 13,000 Litres – For Rainwater or Wastewater Storage
Our robust underground tanks and cisterns, manufactured from durable polyethylene, provide storage capacities of up to 13,000 litres for rainwater or domestic wastewater. Featuring a seamless construction, they are 100% watertight and supplied ready for installation with pre-mounted DN 100 connections.
The round tank design allows for space-efficient underground installation, making these tanks ideal for properties with limited surface area. Depending on your requirements, tanks are available with or without the Biovitor system – our biological filtration solution that provides chemical-free water treatment and integrated inlet calming.
All tanks can be installed below the frost line, are fully recyclable, and are equipped with a telescopic access shaft and a walkable cover as standard. Optional accessories are available for installations in areas subject to passenger vehicle or truck traffic.
Backed by a warranty of up to 15 years, GreenLife underground tanks offer a reliable and long-lasting solution for sustainable water management. Use our rainwater planning tool to determine the ideal tank size for your project.
Underground Tanks from 1,000 to 13,000 Litres – For Rainwater or Wastewater Storage
Our robust underground tanks and cisterns, manufactured from durable polyethylene, provide storage capacities of up to 13,000 litres for rainwater or domestic wastewater. Featuring a seamless construction, they are 100% watertight and supplied ready for installation with pre-mounted DN 100 connections.
The round tank design allows for space-efficient underground installation, making these tanks ideal for properties with limited surface area. Depending on your requirements, tanks are available with or without the Biovitor system – our biological filtration solution that provides chemical-free water treatment and integrated inlet calming.
All tanks can be installed below the frost line, are fully recyclable, and are equipped with a telescopic access shaft and a walkable cover as standard. Optional accessories are available for installations in areas subject to passenger vehicle or truck traffic.
Backed by a warranty of up to 15 years, GreenLife underground tanks offer a reliable and long-lasting solution for sustainable water management. Use our rainwater planning tool to determine the ideal tank size for your project.
Filter products
Our Service Hotline
Our customer service team provides expert support with product selection, applications, and accessories.
Service Hotline: +49 385 773 370 (Mon–Fri 7:00 AM–4:00 PM)
Email: info@greenlife.de
1,000 liter underground tank - incl. dome and cover, with optional accessories
Compact, lightweight, and durable cistern for reliable rainwater storage in a small space.
2,100 liter underground tank - incl. dome and cover, with optional accessories
Space-saving cistern made of durable PE for reliable rainwater harvesting on small properties.
2,200 liter underground tank - incl. dome and cover, with optional accessories
Space-saving cistern for underground rainwater harvesting, featuring a durable, seamless PE tank body and flexible configuration options.
Ground tank 3,200 liters, groundwater-stable - incl. dome, optional with accessories
An exceptionally durable PE cistern designed for demanding installation conditions and long-term use.
3,300 liter underground tank - incl. dome and cover, with optional accessories
Durable, pre-assembled cistern for independent rainwater harvesting—long-lasting, flexible installation options, and Made in Germany.
4,700 liter underground tank - incl. dome and cover, with optional accessories
Durable rainwater storage tank for sustainable rainwater harvesting, featuring long-lasting PE construction and flexible configuration options.
6,500 liter underground tank - incl. dome and cover, with optional accessories
Robuste Zisterne für effiziente Regenwassernutzung mit langlebigem PE-Kunststoff und flexibler Ausstattung.
Underground tank system 13000 liters
13,000-Liter Underground Tank System – Maximum Capacity for Storing Rainwater and Wastewater Versatile. Robust. Ready to connect. The 13,000-liter GreenLife underground tank system offers a high-capacity solution for rainwater harvesting or the safe storage of domestic wastewater (with factory approval, without DIBt approval). The combination of several round tanks with pre-assembled sliding domes and a walk-on cover enables flexible, safe installation—even on larger properties or for increased water demand. Your benefits at a glance 13,000-liter total capacity – ideal for the home, garden, cleaning, or decentralized wastewater management Seamless manufacturing using the rotational sintering process – stress-free structure, 100% watertight Modular system with pre-assembled sliding domes – extendable by 245 mm, tiltable by 5° for optimal terrain adaptation Walkable safety covers – robust, slip-resistant, and easy to maintain Multiple DN 110 connections with rubber lip seals – can be integrated immediately into existing systems Optimized tank statics with corrugated profile – high dimensional stability combined with low weight Additional connection surfaces available – can be drilled individually for future expansions Made in Germany – with a 15-year warranty when properly installed Even easier for you: Service & consultation included Expert support with product selection, sizing, and accessories Delivery within Germany – safe and free to the curb Select compatible accessories directly: Biovitor filter – biological rainwater treatment with integrated inlet flow control Car-accessible covers – for courtyards and driveways Drainage device & gooseneck – for convenient emptying Ventilation and deaeration units / activated carbon filters – for odor prevention and pressure equalization Sustainability with responsibility The tanks are made of recyclable polyethylene (PE), which is free of harmful substances, chemically inert, and durable. A portion of the material comes from in-house recycling – the construction is 100% recyclable. This makes the system resource-efficient and future-proof. Applications Rainwater harvesting – for household connections, garden irrigation, or cleaning Wastewater management (with factory approval) – decentralized solution without a sewer connection Large-scale systems – for apartment buildings, farms, vacation homes, or commercial use Modularly expandable – designed for accessories and retrofits Do you have questions? We’re here to help. Our customer service team is happy to assist you with selection, accessories, and installation: Phone: 0385 / 773370 Email: info@greenlife.de
Underground tank system 9400 liters
Anschlussfertige Regenwasser-Zisterne aus langlebigem, recyclingfähigem PE – vormontiert und Made in Germany.