Used as a soakaway the rainwater collected through pipes from the roof and/or road can be slowly infiltrated into the soil. By infiltrating relatively clean water into the soil, the drainage system is relieved and drying out of the sub-surface can be prevented. Infiltration of rainwater is part of sustainable construction as advocated by the UK Government.

Used as an attenuation system when the normal drainage systems cannot cope with the volume of surface water this is diverted into the Naylor Aquavoid-Metro storage system and released slowly after the storm has passed avoiding localised flooding.

Hand Holds enable the lightweight units to be picked up and positioned easily on site and allow accurate positioning onto the base plate (for the bottom layer) and onto other units (for multi-layer projects).