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Stormwater Attentuation


Molloy Precast offer both quick installation plastic units and precast concrete stormwater attentuation systems. These systems can be designed to comply with local authority requirements and reduce the risk of flooding. We offer a complete design and supply service.

Advantages of Aquacell

  • Lightweight and versatile.
  • Suitable for both soakaway and storage tanks.
  • Easy to install and handle.
  • Allows 'brick bonding' for extra stability.
  • Proven clip and peg system to secure units

Aquacell Blue

  • Designed and developed for areas subject to heavy traffic loading and for large projects
  • Proven vertical loading capacity 56 tonnes/m sq
  • Proven lateral loading capacity 7.75 tonnes/m sq

Aquacell Lite

  • Designed for landscaped and other traffic-free areas where heavy loading is not required 
  • Proven vertical loading capacity 17.5 tonnes/m sq
  • Proven lateral loading capacity 4 tonnes/m sq

How it works

Storm water exceeding the capacity of the conventional drainage system is attenuated by the control manhole and channeled into the AquaCell unit assembly. The internal structure of each unit is designed to bring surging water under control and hold it in temporary storage. If the wrap that envelopes the unit assembly is impermeable, the water will remain in the unit assembly until such a time as it can flow back into the control chamber and discharge through the outflow control. However if the wrap is permeable, the temporarily stored water may be released into the surrounding ground; soil conditions permitting. By controlling the storm water at source and recharging the local groundwater it not only eases the pressure on conventional drainage systems but benefits the local environment as well.

Precast Concrete

Precast concrete stormwater attentuation options designed and supplied by Molloy Precast are available. These are low profile systems to suit site invert levels.

Stormwater Attentuation