Flat tank for maximum capacity with minimal installation depth.
Robox - The flexible flat tank for a wide range of applications.
Robox flat tank with a capacity of 5,000 liters.
The Robox flat tank, with a capacity of 5,000 liters, offers a technically sophisticated solution for storing rainwater or graywater. The tank is designed for both freestanding installation and underground installation and impresses with its robust, durable construction made of high-quality polyethylene.
Typical applications:
- Rainwater harvesting in private households
- Commercial water storage
- Agricultural applications
- Infrastructure projects
- Decentralized water management systems
Why Robox?
In addition, the series is also available in larger models: Robox 4,000 L and Robox 6,000 L. Both variants can be modularly upgraded using the innovative RoKit system to form a fully-fledged small wastewater treatment plant.
This makes the Robox series ideal for residential, commercial, and infrastructure applications where flexibility, expandability, and sustainable water management are key priorities.
All models are suitable for both above-ground and underground installation. The robust PE construction, the well-thought-out design for quick installation, and the sealed lid with telescopic extension ensure high operational reliability and easy maintenance.
Here is an overview of some of the advantages of the Robox series:
Cost-effectiveness & efficiency
- Up to 25% lower installation costs
- Lightweight, quick installation
- Maximum volume per area
- 15% lower shipping costs
- When installing , no water filling is required
Safety & structural integrity
- 100% waterproof
- Excellent static properties
- Earthquake-resistant
- Extremely high stability, suitable for passenger cars
- Can be installed in areas with groundwater - according to the installation instructions
Sustainability & maintenance
- Tank can be completely emptied
- Made from 100% recyclable PE
- Customization available
- Above-ground or underground installation
- Easy maintenance thanks to internal access
The Robox Flat Tank in Detail (5,000-Liter Model)
- PE ADAPTER (THREADED) For the rainwater filter:
- - With gasket, 100% waterproof
- - Adjustment of height and slope to the terrain
- - Two versions (h=500 mm, h=800 mm)
- Lid with frame and lock (accessory)
- Tank filter DN 100 mm
- - Separates dirt particles from rainwater before the clean rainwater can be stored in the tank.
- Internal support pillars for increased load-bearing capacity and backfilling with soil.
- Outlet / Drain DN 110
Dimensions and technical data
Robox Models and Applications
The RoBox series offers flexible and cost-effective solutions for modern rainwater management and decentralized wastewater treatment. With capacity options of 4,000, 5,000, and 6,000 liters, the system meets a wide range of requirements in residential, commercial, and agricultural applications. Its compact, square design maximizes storage capacity while minimizing space requirements, making planning and installation particularly efficient.
RoBox tanks are suitable for both above-ground and underground installation. The robust construction made of high-quality, 100% recyclable polyethylene ensures a long service life, high structural stability, and complete watertightness. A cylindrical dome shaft with a seal allows for height adjustment to the terrain, while integrated system components such as tank filters and pump sumps ensure clean water flow and complete drainage.
The RoBox 4,000 L and 6,000 L models can be optionally equipped with the innovative RoKit system. This allows the tank to be upgraded into a compact biological small-scale wastewater treatment plant, ensuring maximum investment security and future-proofing.
RoBox thus stands for efficiency, expandability, and sustainable water use in a well-designed, modular system.
The innovative plug-and-play technology enables customized adaptation to your specific project requirements. With connection systems for parallel or serial configuration, you can combine multiple tanks to achieve virtually unlimited capacities.
Robox drive (passable)
The Robox 5,000 L model (flat tank) is suitable for installation in areas accessible to passenger cars, provided that the installation is carried out in accordance with the installation instructions with proper covering and a concrete slab. In this version, the tank can be used with a load of up to 7.5 t and is therefore ideal for driveways, courtyards, or parking areas with regular vehicle traffic.
Despite its high load-bearing capacity, installation remains economical and efficient. No massive concrete basin is required, the tank’s own weight is significantly lower than that of comparable concrete tanks, and installation is quick with reduced construction time.
The Robox thus combines proven structural safety with cost-effective installation and long-term operational reliability—even in challenging installation situations.
RotoRain Rainwater Harvesting
RotoRain Garden-Kit BASIC
- Robox Tank
- Walk-on cylindrical tank cover
- DN 400 filter basket for hanging (for roof areas up to 200 m²)
- Submersible Motor Pump Set with MULTI-05-IS 3.6 bar / 95 l/min