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Our water storage systems store water, underground, which is unable to soak into the ground naturally. It can later be allowed to attenuate or infiltrate under controlled conditions or retained for subsequent use.

SDS’s original product GEOlight® was designed and engineered to protect CSOs and saturated land from overloading due to extreme rainfall. Unlike the antiquated drainage systems that many of our cities and towns are equipped with, our geocellular storage tank systems are designed to accept substantial and rapid influx of surface water, retaining this excess water until such time as it can be safely released.

To avoid the potential for flooding, stormwater should be removed quickly and efficiently.

SDS GEOlight®

A unique geocellular system that’s widely recognised as the UK’s market leading water storage and attenuation / infiltration system. It has been specifically engineered to form underground water storage reservoirs in stormwater management schemes.


SDS Weholite

Weholite pipes are made from high density polyethylene – HDPE – and represent a significant contribution in the development of thermoplastic structured wall pipe systems.



With a storage volume of over 96%, Rigofill® can accommodate up to three times the amount of water that gravel swales can. Their cross-shaped inspection tunnel allows the content to be monitored simply and accurately, and to be flushed out as may be required in four dimensions.


Hybrid SuDS

In “hybrid” storm management systems SDS engineered water storage and treatment devices below-ground combine with, enhance the performance and extend the lifespan of vegetative SuDS materials above-ground. Allied to SDS SYMBiotIC™ smart monitoring and control these devices protect nature-based solutions from the impacts of excessive or insufficient rainfall.


GEOlight® working with Weholite

SDS GEOlight® and Weholite storage and conveyance devices work together to ensure surface water is managed efficiently and effectively, from its point of ingress into the SuDS system to its final release. Weholite manholes also provide a suitable location in which to house SDS SYMBiotIC™ smart monitoring and control devices.


RAF Lossiemouth

RAF base equipped with Scotland’s largest Weholite surface water attenuation tank.

Army Basing Programme

SDS GEOlight® attenuation tanks and soakaways are key ingredients of the MoD’s “project of unprecedented scale”.

South Sebastopol, S. Wales

SDS protects new development of 1,200 homes against flooding and environmental pollution.

Need to know more about specific features or benefits? Get in touch with our expert team.