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Underground Water Storage System

underground stormwater storage with Rainstore3 Modular Units

Made From 100% Recycled Plastic

Rainstore3 is a modular, stackable, underground water containment system. Designed by a Landscape Architect for both subsurface detention basins and retention/harvesting systems in 1999, Rainstore3 has since been used in a myriad of other applications such as water/rain gardens, green roofs and sports field drainage. With depths ranging from 4” to 7.9’, units arrive to the site preassembled for easy, drop-in installation.

Learn More About Rainstore3

Each unit of Rainstore3 measures 1 m x 1 m x 0.1m high (3.28 ft x 3.28 ft x 4 inches). The compression fit units are stacked (if applicable) and sent preassembled to the construction site so there is no assembly required.
Making use of Invisible Structure’s trademark ring-on-grid design, Rainstore3 exceeds H-20 loading allowing it to support vehicular traffic, lightweight buildings or greenspace. An impressive 94% void space equates to almost 25 gallons of water storage per unit with no gravel fill required.

Better Stormwater Solutions/Applications

  • Underground Detention Basin
  • Retention/Harvesting Systems
  • Water/Rain Gardens
  • Green Roofs
  • Sports Field Drainage
  • Downspout Catch Basins

The Rainstore3 Advantages

  • Modular and Stackable
  • 94% Void Space with No Gravel Fill
  • Exceeds H-20 Loading
  • No Assembly Required
  • 100% Recycled Plastic
  • LEED Certified

Product Gallery

Top down view of Rainstore 3 stacked
Rainstore 3 stacked
Close up of side of Rainstore 3 cells
Tall stack of Rainstore 3 next to woman
Tall stack of Rainstore 3