Atlantis Modular Drainage Systems

Mini Flo-Tank®

Compact modular polypropylene system for subsurface drainage and void-space applications, designed for integration into engineered landscape and stormwater assemblies.

Mini Flo-Tank modular system used for underground water storage and stormwater management.

Atlantis Mini Flo-Tank® is a compact, modular polypropylene system designed to provide subsurface void space for water storage and drainage applications. With a module height of 240 mm and a 95% void ratio, the system provides a space-efficient solution for integration within engineered underground and landscape assemblies.

Manufactured from selected recycled polypropylene materials, Mini Flo-Tank® combines a lightweight modular configuration with high internal void capacity. Its suitability for a particular installation depends on the required hydraulic performance, structural loading and site-specific construction conditions.

240 mm

Module height

95%

Void ratio

65 L

Storage capacity

Product Design and Function

Interlocking Plate Assembly

The Atlantis Mini Flo-Tank® is constructed from individual polypropylene plates featuring an open-lattice geometry that allows water to enter and move freely through the structure.

These components interlock to form a three-dimensional modular unit, creating an interconnected internal void space for water storage and drainage. The assembly system enables individual plates to be connected into a complete, self-supporting module.

Large Plate forms the base of the module.

Mini Small Plates installed vertically onto the base to form the internal structure.

Mini Large Plates connected to the assembly to enclose the sides of the module.

Large Plate secures the top of the assembly, completing the module enclosure.

Mini Flo-Tank® complete modular unit, ready for integration into the specified system.

Vertical Module Connection

Atlantis Mini Flo-Tank® modules can be assembled vertically to create multi-level configurations, allowing the overall system depth to be adapted to project-specific requirements.

The top plate of each completed level also serves as the base plate for the level directly above. Additional internal and side plates are connected to this shared plate, extending the structure vertically without requiring a separate base plate for each level.

This assembly process can be repeated to achieve the required system depth, subject to the structural loading conditions and engineering requirements of the project.

A fully assembled Mini Flo-Tank® forms the first level of the vertical structure.

Mini Small Plates are installed onto the existing top plate, which serves as the base for the next level.

The second level is completed using the shared horizontal plate between both modules.

Additional internal and side plates extend the structure vertically to form another level.

The completed structure demonstrates how successive levels can be interconnected to achieve greater system depth.

Internal Plate Configuration

The Mini Flo-Tank® is available with different internal reinforcement configurations to accommodate varying structural loading requirements.

The standard configuration incorporates four internal plates, while five-plate and seven-plate configurations provide additional internal reinforcement to increase resistance to compressive loads.

The appropriate configuration is determined by the anticipated loading conditions and the structural requirements of the installation.

4 Plates

Standard configuration for applications with lower structural loading requirements.

5 Plates

Additional internal reinforcement for applications requiring increased compressive resistance.

7 Plates

Enhanced internal reinforcement for applications subject to higher compressive loads.

Technical Specifications

Part Number

Part Size

 Gross Volume

Storage Capacity

 Ultimate Strength

Flow Rate

Part Weight

Modules per m³ / 35.31 ft³

Service Temperature

Metric

70010

(H) 240mm (W) 408mm (L) 685mm

0.067 m3

65 litres

18.2 tonnes/SQM *4-plate system

5.9 Litres/Sec/m @ 1% gradient (BS EN ISO:12958)

5.5 kg

15

-100 C – 700 C

Imperial

70010

(H) 9.45” (W) 16.06” (L) 26.96”

2.36 ft3

17.2 Gal

178kN/m2 *4-plate system

1.56 Gal/s @ 1% gradient (BS EN ISO:12958)

12.1lbs

15

14 F0 – 158 F0

Volume Void

Material

Colour

 Chemical & Biological Resistance

Approximate Material Lifespan

95%

100% Recycled Polypropylene = 95% Recycled Polypropylene + 5% Proprietary Selected Materials

Black

Unaffected by molds, algae, soil-borne chemicals, bacteria and bitumen

100 years + with no ultra violet exposure (NOTE: With underground installations)

Download Spec Sheet – Click here

Applications & System Integration

Landscape Void Fill

Mini Flo-Tank® modules can be integrated into engineered landscape void-fill assemblies to create lightweight modular volumes beneath elevated landscape surfaces, reducing the need for conventional bulk fill materials.

Planter Boxes

The open-void structure of Mini Flo-Tank® modules can be incorporated into planter box assemblies to provide subsurface drainage and temporary water storage, supporting controlled water movement within engineered landscape systems.

Underground Stormwater Tanks

Mini Flo-Tank® modules can be assembled into underground stormwater systems designed for infiltration, on-site detention or rainwater harvesting. The appropriate tank configuration and surrounding materials are determined by the intended hydraulic function, structural loading and site-specific design requirements.

Mini Flo-Tank® in Practice

Explore how Atlantis Mini Flo-Tank® modules have been incorporated into engineered landscape and subsurface applications. Project examples illustrate system configurations, site constraints and the integration of modular void-space solutions within the overall construction.