JUMBO BLOCK® is both: walk-in rainwater storage made of reinforced concrete that can be built over, beneath roads, squares and buildings – and a complete software world in which planners calculate, administrations work and operators stay operational in an emergency.
“Evaporation, cloud formation, local heavy rain. It is not getting better, it is not getting less – it is going to increase. We have no solution for the weather. We do for these columns of water.”
Andreas Zanni, founder of JUMBO BLOCK®
Sewers, streams and roads were built for the climate of past centuries. Today’s rainfall no longer fits into them. Protecting means storing.
No additional land take: the storage lies beneath roads, car parks, squares or buildings – life goes on above.
No mobility transition works without functioning infrastructure. It has to withstand the floods – today and in a hundred years.
JUMBO BLOCK thinks infrastructure through to the end: from the first raindrop through sizing, structural design and costs to operation, inspection and the emergency.
Modular reinforced concrete cubes that can be lined up across any area, walked into, built over and designed for the heaviest traffic loads.
A coherent, bilingual working environment in the browser – works offline, no installation, no cloud lock-in. It even starts from a USB stick.
Two frames of four beams each, connected by four more beams – twelve beams in total, an open cube of reinforced concrete. Each module is rotated by 90° relative to the next. This creates a composite that distributes loads and lets water flow through freely.
Floor, cover and wall plates (from 120 mm) close the installation. Joints and walls are bonded watertight with SABA EcoSeal – environmentally friendly and suitable for drinking water. Installations are single-layer and can be extended across any area without limit.
From the concrete module and the mix design to secured sensor data processing – three registered IP rights, one system.
The origin of the JUMBO BLOCK system – collecting flood water underground.
IP right No. 20 2021 002 498Today’s module: two vertical frames connected by four horizontal beams.
IP right No. 20 2025 000 597High-performance fibres such as carbon, hemp or basalt, mineral crystallisation particles, micro-encapsulated binders and nano-silica – for high load capacity and autonomous crack healing, optionally with CO₂-reducing components.
within IP right No. 20 2025 000 597Filtered input, isolated processing, cryptographic validation: sensor data are digitally signed, stored immutably in a decentralised ledger and linked to the physical parameters of the installation. The foundation of the live dashboard – designed for the JUMBO BLOCK modules from the IP rights of 2021 and 2025.
IP right No. 20 2026 000 087A JUMBO BLOCK system disappears into the ground – and the surface above remains usable: as a road, car park, market square, commercial yard, field, meadow or forest.
The modules, each rotated by 90°, act as a composite. Lorries, buses and heavy traffic drive over the installation – without restriction.
2.5 m room height and 2.0 × 2.0 m clear width: inspection, cleaning and maintenance are done on foot, with your own eyes.
From compact storage to large installations with more than a thousand modules – single-layer, in any footprint, extendable at any time.
The storage lies beneath areas already in use. No basin, no fence, no lost plot.
Stored water cools the surface above. The JUMBO BLOCK heat balance calculated a surface temperature difference of up to 9.3 °C.
Reinforced concrete with a service life of 80–120 years. Modules can be removed, reused elsewhere and recycled at the end.
Robust infrastructure for data centres, utilities and municipalities – with sizing and operation that take the German KRITIS Framework Act, NIS-2 and the CRA into account.
Industrial prefabrication in German precast plants: consistent quality, short construction time, predictable logistics. Distributed by AQUATO® Umwelttechnologien.
From storage verification to structural design, the Engineering Suite delivers reliable figures – before the first excavator moves.
Move the slider to your storage volume. You instantly see how many JUMBO BLOCK modules are needed and how the installation grows in plan.
Estimate with 13.9 m³ storage capacity and a 6.25 m² grid per module. Create the storage verification per DWA-A 117 with KOSTRA-DWD-2020 in Hydro, plan the installation in Plan.
The JUMBO BLOCK Engineering Suite calculates end to end: each program takes over the results of the previous one. No duplicate entries, no media breaks, deterministic results – identical inputs deliver identical figures.
Storage verification per DWA-A 117 with KOSTRA-DWD-2020 – free.
02 · PLANModule grid, installation geometry, quantities and PDF report – free.
03 · DESIGNDimensioned 3D model with section, exploded view and CAD export as IFC, DXF and STEP AP242 – free.
04 · STATICStructural verification of the installation as an engineering service by JUMBO BLOCK.
05 · TEMPCooling effect and thermal behaviour as an engineering service by JUMBO BLOCK.
06 · BUDGETCost framework and quantities for the decision – free.
project.dbm – the digital building model. One file, one project, verifiable by hash.In the browser, without installation, without cloud – even directly from a USB stick via file://.
Every program and every manual in both languages – for planning offices and international teams.
All calculations run in your own browser. Nothing is uploaded, nothing is monitored.
The suite is freely available – as a toolbox for everyone who makes water manageable.
The calculation chain for underground rainwater storage.
Your complete working day – offline, encrypted, without licence fees.
Fundamentals, explainers, videos and the JUMBO BLOCK world.
Ransomware paralyses the administration. Servers are encrypted, certificates expired, communication dead. JUMBO BLOCK built tools for exactly this moment – offline, encrypted, ready for immediate use.
Take the affected computer off the network. If forensics are planned, call in specialists before switching it off.
Plug in JUMBO BLOCK Rescue and boot an independent Linux directly from the stick.
Check drives, scan for malware, secure evidence – and document everything in the encrypted logbook.
Rescue data and work with the complete suite from the stick – reporting obligations, communication, documents.
Bootable rescue and work system with the complete Engineering Suite. Image on request, download with a personal code, verified via SHA-512.
More about Rescue →Sensors in the installation deliver fill level and condition. The data are processed, and their proof of integrity is anchored immutably in the IOTA ledger. Every reading stays verifiable – for operators, authorities and insurers.
Readings straight from the storage, by radio via The Things Network.
Off-chain processing with deterministic algorithms.
Only the proof of integrity goes onto IOTA – lean, verifiable, tamper-proof.
The dashboard shows and warns. A human always makes the decision.
JUMBO BLOCK relies on IOTA, the distributed ledger technology for the Internet of Things. The readings are processed off-chain – only their proof of integrity ends up in the IOTA ledger. Lean, permanent and verifiable by anyone.
The entire integration was developed in-house.
The explainer animation shows what happens during the next cloudburst: once without storage, once with it.
JUMBO BLOCK is a brand of ZANNI GROUP from Bochum, Germany. Founded and led by Andreas Zanni – with a team that combines more than 250 years of innovation and experience.
JUMBO BLOCK project start
years of combined experience in the team
programs in the Engineering Suite
domains, one system: app · org · net · info
We claim nothing that cannot be publicly verified.This principle has applied at JUMBO BLOCK since day one – to every figure, every data sheet and every calculation.
Municipality, planning office, investor, data centre or utility: talk to us about your project – or calculate it yourself right away.
