Products / Techniques

Modular Storage and Soakaway System

Infiltration is a priority process for Sustainable Drainage Systems to ensure control of water as close as possible to the point of falling and mimic natural processes.

Often naturally-occurring or ‘soft’ SUDS features alone are insufficient to address the site-specific conditions of a development or demand premium development space. In such cases, using an engineered system such as Hydro’s Stormbloc® enables SUDS standards to be achieved.

Stormbloc® successfully provides high-capacity retention of surface water runoff which can supplement swales and ponds, contribute to a combined SUDS stormwater system or operate alone as required to meet requirements to limit off-site discharges.

BBA approved, Stormbloc® facilitates natural surface water infiltration with an underground storage and soakaway system. It is the only cellular crate system with a patented inspection and maintenance tunnel built into each block.

The modular design is easy to install for residential, public, commercial or industrial surface water control, and Stormbloc® is strong enough to withstand traffic loads under roads and vehicle parks, or amenity and landscaped areas.


Full inspection and maintenance accessibility through the patented 222mm X 570mm tunnel within the blocks

Optimum storage volume from high void ratio

Light weight, quick and easy to install

High strength allows deployment under trafficked areas, road and HGV parks

Learn More about Hydro Stormbloc® Storage and Infiltration system

Read best practice case studies using Hydro Stormbloc® storage and infiltration system.

Photo courtesy of Cole Easdon