Hydro International adds strength options to its Stormbloc Optimum range of below ground storage

Sustainability Thu, Sep 18, 2025 9:45 AM

Flood prevention and stormwater management solutions specialist, Hydro International has announced a further extension to its popular Stormbloc® Optimum geocellular storage / infiltration system with two new blocks, the Stormbloc® MX and the Stormbloc® HX.

Two new blocks were developed by Hydro International’s polymer specialist REHAU and are designed to enable engineers to create more cost-effective and flexible designs, with a choice of strengths and depths to suit different loading applications.

Stormbloc® LT –the lighter, cost-effective option, for landscaped or lighter traffic areas, up to 3 m in depth.

Stormbloc® MX –a new medium strength block for mid-range traffic loading, up to 3 m in depth.

Stormbloc® SX –for heavily loaded and high traffic areas, up to 4 m in depth.

Stormbloc® HX – for very heavily loaded areas, up to 6 m in depth as standard.

All the blocks in the Stormbloc® Optimum range have been designed to deliver customisable, modular below ground storage or infiltration, with the length, width and depth adaptable to most drainage designs.

Stackable to save space, and lightweight but robust, the range is easy to transport and quick to install, helping contractors cut costs and save time on site.

Maintenance of below ground systems is vitally important to ensure that capacity isn’t compromised by the build-up of silt and sediments over time.

Where pre-treatment upstream of the tank isn’t practical, Stormbloc® MX/SX/HX tanks can be configured to include Stormbloc® Inspect chambers to enable CCTV inspection and cleaning.

A row of Stormbloc® SX along with Stormbloc® Inspect chambers can also be included in Stormbloc® LT tanks to facilitate inspection and maintenance.

Ben Puddy, Product Manager for Hydro International, commented, “This further expansion of the Stormbloc® Optimum range now gives drainage engineers a variety of more cost-effective options to meet different site requirements.”

To find out more about the expanded Stormbloc® Optimum range, please visit: hydro-int.com/stormbloc-optimum.

In association with Hydro International


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Unit 2, Rivermead Court
Kenn Business Park
Clevedon
BS21 6FT
United Kingdom
T: 01275 878371
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