SmartSoak® – Residential Stormwater Management System


  • Maintainable system which will not silt up over time
  • Stores runoff from impermeable surfaces
  • Pre-approved by council*
  • Available in three standard sizes

About SmartSoak

In a smart, easy and cost effective kit, the SmartSoak system contains all the components needed to attenuate stormwater from an individual residential site. Hidden underground, SmartSoak stores runoff from the impermeable surfaces in a series of modules wrapped in a geotextile fabric where it slowly soaks away into the surrounding soils and/or is released through an orifice.

Using the innovative ‘Linear Access’ pipes, SmartSoak is a maintainable system which will not silt up over time, like traditional gravel soakage stormwater pits and buried crate systems.

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• SmartSoak is smart, cost effective and compact; boasting a 95% void ratio compared with traditional soakage aggregate pits with a void ratio of 30-40% which are not able to be maintained.

• The SmartSoak modules are pre-approved by council* which streamlines the consenting process for the developer and project engineer.

• Available in 4 standard sizes to suit property requirements, the SmartSoak system can be easily installed anywhere on the property. The modules are trafficable meaning they can be installed under driveways and parking areas, providing there is a minimum of 600mm of cover.


*SmartSoak modules and linear access technology hold pre approval certification from Auckland and Hamilton City Councils. At present, these are the only councils requiring formal approval for underground stormwater devices.

Linear Access “First Flush”


Module Assembly


Frequently Asked Questions

Does SmartSoak come assembled or flat-packed?

SmartSoak comes flatpacked to save freight and is easily assembled using a rubber mallet.

Is SmartSoak a maintainable system?

Yes, SmartSoak is designed to collect silt and other debris in the sumps which can be sucked out.


SmartSoak Module Technical Specifications
WIDTH 400mm
LENGTH 715mm
HEIGHT Double module = 860mm
CAPACITY 233.64L / Double Module
LOAD BEARING CAPACITY 22.8t/m2(can be increased using more plates if required)
MATERIAL Polypropylene copolymer (food contact grade)
LINEAR ACCESS PIPES 150mm  diameter
WRAPPING GEOTEXTILE SmartSoak® geotextile wrap must be: DuraForce® AS410 (NZTA
Strength Class C)
Minimum Cover Depths
Non trafficked areas: eg: Landscaping 450mm
Car parks, vehicles up to 2,500kg gross mass 600mm
SmartSoak Kit Standard Sizes
13281 SmartSoak® 3.5m3 System 2 x 2.145 x 0.86 15
13085 SmartSoak® 5m3 System 2.8 x 2.145 x 0.86 21
13086 SmartSoak® 7m3 System 4.0 x 2.145 x 0.86 30
13087 SmartSoak® 10m3 System 5.2 x 2.145 x 0.86 42


Product Information