In these results of a compression test, samples of GEOlight® 400 were compressed at 1mm per minute. The deformation at 400kN/m2 shows as being approximately 1.6%.

SDS takes pride in manufacturing our own unique GEOlight® stormwater attenuation tanks entirely from post-consumer PVC waste normally destined for landfill. This reduces carbon footprint and helps projects achieve a higher BREEAM rating (the building environmental assessment). 

GEOlight® has been specifically designed to form underground water storage reservoirs in storm water management schemes. Its honeycombed structure gives it certain unique characteristics that make it ideal for this purpose:

• The high void rate (95%) of GEOlight® means that the maximum volume of water is stored in the minimum volume.
• It has high compressive strength and is available in two strengths as standard: 200 and 400kN/m2. Higher compressive strengths are also available from 600 to 1000 kN/m2, see graph right.

Special features

The GEOlight® Storm water Attenuation System consists of two manholes (inspection chambers) connected by a length of perforated distribution pipe which feeds the storm water storage reservoirs on either side formed from GEOlight®.

The distribution pipe is normally from 225mm up to 500mm diameter, generally covered in a trench filled with draining material such as 15/25 clean graded stone, free from fines.

The reservoirs and distribution pipe are wrapped in a waterproof membrane, such as butyl, to prevent water seeping into the surrounding ground. The top of each GEOlight® reservoir has a vent which is connected back to the upstream manhole. A geotextile or 10mm mesh geogrid is laid between the distribution pipe and GEOlight® to prevent the GEOlight® units being clogged by the draining materials.