Hydro Dynamic Separator

The EnviroBasin™ is a revolutionary stormwater separator.

The innovative all-in-one precast water quality inlet is a catch basin installed to capture and treat stormwater runoff at the source, removing sediment and debris before it reaches local water bodies.

The EnviroBasin™ is a certified trash capture device and has the equivalent performance of an HDS.

EnviroBasin™ is simple to incorporate into any infrastructure project and supplied as a manufactured product. The integrated nature and benefits of the device reduce concrete, pipe work and maintenance,  conserving space and saving contractors time and money.

EnviroBasin™ is the ultimate pre-treatment solution for LID, rain gardens, tree cells and urban green infrastructure.

LittaTrap EnviroBasin Oil and Grit Separator
LittaTrap EnviroBasin Oil and Grit Separator Unit
LittaTrap EnviroBasin Oil and Grit Separator


Using the EnviroBasin™ instead of traditional HydroDynamic Separators (HDS) reduces the number of stormwater assets installed and maintained, providing significant savings to the land developer and the end-user.


The EnviroBasin™ is a
pre-manufactured and easily handled device saving the drainage contractor time and expense in installation.


The system is easy to maintain and the EnviroBasin™’s unique enhanced storage sump capacity extends vactor truck maintenance requirements to once every
two-to-three years.


The EnviroBasin™ received ISO 14034 verification in 2021, obtaining over 60 per cent removal of suspended sediment.

The EnviroBasin™ is a catch basin and separator housed in a single unit that collects, treats, and conveys stormwater into the stormwater network.

  • Alternative to catch basin or end of line HDS
  • Efficiently conveys peak stormwater flows without resuspension.
  • The EnviroBasin™ is available in a variety of sizes and configurations and is ideal pre treatment to green infrastructure and LID
  • The EnviroBasin™ is compact and can be applied in tight urban spaces where there are space constrains.

Available across the USA for your latest stormwater project.
Talk to one of our expert team to find out more .

LittaTrap EnviroBasin Oil and Grit Separator

Free design and sizing service

EnviroPod™ offers a free design service where the cumulative performance of several EnviroBasin™’s can be modelled for a specific project based on local rainfall and treatment needs.

This service allows stormwater consultants to optimize the number and the location of EnviroBasin™’s for their projects.

Contact one of our team to find out more .

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Technical documentation & drawings

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Product Sheets & Manuals

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North America :  +1 (909) 499-7298

Australia Toll Free: 1800 249 927

All other regional enquires: +64 (21) 525398

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