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Stormbloc® Optimum
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Hydro products in situ
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Stormbloc® Optimum Row
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Stormbloc® Optimum
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Stormbloc® Optimum
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Stormbloc® Optimum Installation on Site
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Stormbloc® Optimum
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Stormbloc® Optimum Installation on Site
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Stormbloc® Optimum Installation on Site
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Stormbloc® Optimum Installation on Site
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Stormbloc® Optimum Installation on Site
Stormbloc® Optimum
Attenuate surface water and stormwater effectively even in challenging high-traffic urban environments.
The Stormbloc® Optimum range includes two durable geocellular systems, Stormbloc® and Stormbloc® Extra, for underground storage and infiltration of surface water, along with the Stormbloc® Inspect chamber for easy inspection and maintenance.
Their lightweight yet robust design makes them easy to transport, quick to install, and highly durable, even beneath high-traffic areas such as roads, car parks and warehouse yards.
The modular, customisable Stormbloc® Optimum range gives engineers the flexibility to configure storage solutions for even the most complex SuDS projects.
Stormbloc ® is a registered trademark of Hydro International.
FULL DESIGN SERVICE AVAILABLE ON REQUEST
• New and retrofit Sustainable Drainage Systems (SuDS) schemes
• Infiltration / soakaway schemes
• Attenuation schemes
• Highways & infrastructure projects
• To increase swale / pond capacity
• Car parks and park & ride schemes
• Housing developments
• Commercial development
• Schools & public / civil schemes
• Aquifer re-charge
• Storage for rainwater harvesting and re-use.
Maximise Storage Efficiency
The Stormbloc® Optimum range can store 960 litres of stormwater below ground in 1 cubic metre of volume, more than 60% more stormwater storage in the same volume when compared to conventional gravel infiltration trenches.Customisable Storage
Easily configure length, width, and depth to meet complex drainage needs. Load-bearing options for both high and low traffic areas support efficient, cost-effective designs.Maximise On-Site Space
Stormbloc® and Stormbloc® Extra nest compactly for transport and storage, saving up to 75% of space. Nested units also speed up installation by allowing more volume to be placed at once.Lightweight with Strength Options
Choose Stormbloc® Extra for deep or high-load applications, or Stormbloc® for shallower, low-traffic areas, offering flexibility without compromising durability.What’s the difference between Stormbloc® and Stormbloc® Extra?
Stormbloc® is lighter and ideal for landscaped or lightly trafficked areas.Stormbloc® Extra is a high-strength block suitable for deep installations (up to 4 m) and heavy traffic areas like roads and car parks.
How deep can my storage tank be?
Stormbloc®: Up to 3 m excavation depthStormbloc® Extra: Up to 4 m excavation depth
How much water does each Stormbloc® unit store?
Stormbloc®Full unit (800×800×300 mm): 0.203 m³
Base plate (800×800×30 mm): 0.017 m³
Stormbloc® Extra
Full block (800×800×660 mm): 0.405 m³
Half block (800×800×360 mm): 0.221 m³
What is the minimum cover level for a Stormbloc® installation?
The minimum cover level depends on the expected loading conditions and whether Stormbloc® or Stormbloc® Extra blocks are used.What are the lateral loadings for Stormbloc® blocks?
Stormbloc®Vertical ultimate compressive strength: 313 kN/m²
Horizontal ultimate compressive strength: 93 kN/m²
Stormbloc® Extra
Full block
Vertical: 420 kN/m²
Horizontal: 165 kN/m²
Half block
Vertical: 420 kN/m²
Horizontal: 225 kN/m²
What maintenance is needed?
Stormbloc® and Stormbloc® Extra systems allow access for CCTV inspection, cleaning, and maintenance. We recommend scheduled maintenance at least once a year.For smarter maintenance, Hydro-Logic® Smart Maintenance technology can be integrated into the tank. It enables remote monitoring, sends automated alerts for cleaning or blockages, and uses data from the Hydro-Logic® Flexi Logger and sensors to forecast maintenance needs and optimise planning.
How are the blocks delivered?
Stormbloc®Delivered in compact nests on jumbo pallets (max. 1.6 m L × 0.8 m W × 1.5 m H).
Each pallet holds up to 26 Stormbloc® elements or 92 base plates.
Stormbloc® Extra
Also delivered nested on jumbo pallets of the same dimensions.
Each pallet holds up to 34 Stormbloc® Extra elements.
Discover the Stormbloc® Optimum in action by clicking the links below:
£4.28 million Flood Defences Go Underground, Overground in London Parks
Hydro International are a global company who provide advanced products, services and expertise to help municipal, commercial and industrial customers to improve the way they process, treat and manage water.
