Rain Tank Stormwater Management

The Rain Tank is a sub-surface rainwater storage tank with highly permeable surfaces made up from manufactured modular components. It is used “at-source” allowing the option for infiltration, detention, or retention. With these unique characteristics, the Rain Tank aids designers in managing stormwater run-off, reducing pollutants entering surface waters, recharging local aquifers and relieving pressure on existing stormwater systems.

The Emco Rain Tank System is the complete package of components you will need to install a Rain Tank, including engineering consultation and on-site instruction and inspections. This package is brought to you using a simple cost/m³ of tank.

Since 2003, Emco has been providing Rain Tank solutions for engineers, municipalities, and developers across the country. We have numerous installations in British Columbia, Alberta, and Ontario (see project examples).  To date, installed tanks range from as little as 2 m³ to larger than 4,000 m³– there is no limit to what you can achieve in capacity.

The core of the Emco Rain Tank System is the modular components. Emco first brought you the original Atlantis D-Rain Tank module, designed in Australia over 20 years ago. We are now also introducing the next generation modular system from Brentwood Industries – the StormTank module - manufactured in North America. Both modular components are made from recycled post-industrial plastic, which is particularly important if you are working on a LEED^TM project.

The Emco Rain Tank System offers a unique combination of flexible configurations, ease of installation, high detention capacity, high media permeability and low long-term clogging factors; all in one system. It has a wide range of applications including car parks and road drainage, housing, sports fields, roof gardens, etc. For the same excavated volume, an Emco Rain Tank System can manage a lot more water than conventional infiltration methods – such as sand trenches, soak away gravel pits, perforated or slotted pipe.

With its sub-surface design, the Emco Rain Tank System maintains environmentally sustainable urban developments. It alleviates mosquito infestation, and maintenance/liability headaches that open detention ponds bring about. Furthermore, by installing under parking lots or landscaped areas, developers can free up land for additional revenue.

For further information, please contact your regional representative.

The Emco Rain Tank System is a complete package from Emco that includes the following products and services:

This package is provided as a complete system based on cost/m³

Featured Examples:

1) Infiltration - Ridgeview, Kamloops, BC - Stanec Consulting

This 200 m³ project collected all run-off from building roofs, driveway and parking areas directing them into Rain Tanks for direct ground water recharge.

2) Detention - Polson Mall, Vernon, BC - TRUE Consulting Group

Due to additional building development at this busy mall, a 40 m³ lined detention tank along with a flow control device was used to maintain pre-development flow rates from a highly impermeable site.

3) Infiltration/Detention - Food Processing Plant, Surrey, BC - Aplin & Martin Consultants Ltd.

4) Retention – Steveston Secondary School, Richmond, BC - Stantec Consulting

A 3.5 m³ lined rain tank was used to store roof rain water run-off for further use in irrigation.

5) Detention - Chinook Centre, Calgary, AB - Urban Systems Ltd

Changes to roofing run-off due to the mall expansion required 934 m^3 of storage in order to mitigate issues on the City system downstream of the flow control device.

6) Infiltration – Hamilton, ON - MTE Consultants Inc.

To maintain predevelopment conditions, this 137 m3 infiltration tank was installed between and behind two new residential condominiums buildings.

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