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RainSmart® Stormwater Modules

The RainSmart® modular tank system is suited for subsurface infiltration, retention and detention stormwater applications.

The modules are manufactured using recycled materials and provide a lightweight, structural component to an engineered design. The system is ideally suited for the construction of underground infiltration, retention, detention tanks, grass swale, subsurface interception channels, septic leach drains and lightweight void fillers for roof garden and planter box applications.

The RainSmart system supersedes traditional gravel and pipe-based systems. The system provides a void space ratio of over 95%, compared to 30 – 40% in typical gravel and pipe based systems. Consequently, the RainSmart system offers a smaller footprint for the same storage volume. This provides a significant saving in the amount of excavation, soil transport, imported clean aggregate, thus reducing earthworks related installation costs and causes minimum site disruption.

The modules are available in kit form, making transporting economical and easy to handle. The lightweight and stackable nature of the tank modules ensures installation is quick and easy, eliminating the use of heavy machinery.

Frequently Asked Questions

Whether you need to hold stormwater (detention system), soak water away (infiltration system) or detain water to release at a controlled rate (attenuation system), RainSmart will provide a simple, cost effective and maintainable underground stormwater management solution for your site.

We are a supplier of RainSmart and related materials only. However, we do have a network of experienced contractors that we can recommend for RainSmart installations.

Contact us for more information.

300mm of cover material is needed for non-trafficable applications. Trafficable areas require 600mm of granular cover material with DuraGrid X geogrid installed 300mm above the system and extended 1.5m horizontally beyond the edge of the system.  Please note, the RainSmart plate configuration shall be specifically designed by the project engineer for installations with more than 2m of cover or trafficable applications with less than 600mm of cover.

Non-trafficable areas with 0.3m to 2m of cover should use 4-Plate modules. Trafficable areas with 0.6m to 2m of cover should use 5-Plate modules. Please note, the RainSmart plate configuration shall be specifically designed by the project engineer for installations with more than 2m of cover or trafficable applications with less than 600mm of cover. 7-Plate modules will likely be required for these applications.

When an impermeable liner is required, the liner used will depend on the application and size. Typically, folded PVC liners are used for smaller residential applications and welded FPP or HDPE liners are required for more significant or critical applications.

RainSmart modules are supplied flat packed and will need to be assembled on site. Building the modules should take 2-3 minutes per module layer. This is a conservative estimate used to approximate the total man hours needed for assembly (refer to page 5 of the RainSmart Installation Guide). Note that this time frame relates to assembly only. The time required to place the modules within the excavation will be dependent on site accessibility and layout. If practical for your site, installation can be sped up by assembling the modules in the excavation.

Benefits & Features

5 Plate Single Module Assembly

RainSmart Stormwater modules are easy to assemble simply by using a rubber mallet.

Download the Installation Guide for more comprehensive installation instructions.

Please be aware this illustration details the 5 plate single module assembly. 4 and 7 plate modules are also available – please check your installation guidelines before assembling.





76349 5 Plate, Single Module 0.715L x 0.4W x 0.44H
76354 5 Plate, Double Module 0.715L x 0.4W x 0.86H
13635 5 Plate, Triple Module 0.715L x 0.4W x 1.28H




13666 5 Plate, Quad Module 0.715L x 0.4W x 1.7H
76351 5 Plate, Penta Module 0.715L x 0.4W x 2.12H

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Please note:

Cirtex stocks the Triton S22 Chambers. When using the calculator, please ensure you change 'chamber selection' to S-22.

RainSmart Assembly Guides

4 Plate Modules

RainSmart Assembly Guides

5 Plate Modules

RainSmart Assembly Guides

7 Plate Modules