Plati-Drain™ Horizontal Drainage Systems

Plati-Drain™ is a unique patented solution that reduces pore water pressure within clay slopes and behind retaining walls.


Water saturation, due to heavy rainfall and insufficient drainage, leads to the softening of clay soils within slopes and increases hydraulic forces behind earth retaining structures.

Plati-Drain™ is a unique patented solution that reduces pore water pressure within clay slopes and behind retaining walls. Unlike conventional weep holes Plati-Drain provides deep penetration, this can be in excess of 10m / 33′. It can also help prevent shallow or deep seated slope failures.

Available as a ‘Passive’ or ‘Active’ solution. The ‘Passive’ system uses a sacrificial anchor head to drive the Plati-Drain™ into its optimum position providing an immediate channel for water to drain.
The ‘Active’ system has an additional wire tendon attached to the anchor which allows it to be load locked, providing simultaneous draining and restraining capability.


  • Fast and efficient to install 
  • No drilling mess
  • Can be used as an active anchor 
  • Cost effective 
  • Can be installed with small hand equipment for restricted sites

Horizontal Drainage Systems


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A small, already existing, embankment slope located in Noosa in Queensland required slope repair and stability. Platipus anchoring systems were used with a geosynthetic permanent erosion control matting for a ‘combination solution.’ Thesystem  was also designed and detailed to facilitate and encourage vegetation growth and establishment.

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The WestConnex is a world-class infrastructure project cutting 3 quarters of an hour off a typical journey between Parramatta and Sydney Airport. Work is currently ongoing on the first 7.5km of M4 Motorway being widened to 4 lanes in each direction between Parramatta and Homebush. The Rizzani Leighton Joint Venture has been contracted to design and build this section of the WestConnex project.

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The geotech engineers from Opus International chose the Platipus® (ARGS) System for this repair. Part of the reasons it was chosen included the tested and documented performance of the Pyramat® HPTRM when used to preventing surface erosion, while giving a larger tensile strength than that of steel mesh. The high tensile strength and extremely high resistance to UV along with the unique X3® fibres of the Pyramat® HPTRM was needed in this tough seaside environment where the matting will be exposed to salt spray and extended UV exposure.

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