Engineered underground storage
Configure underground detention, infiltration and rainwater harvesting systems for commercial projects from approximately 100 m³, with preliminary sizing, technical support and Australia-wide supply.
Technical resources · 3 files
Current product documents are available here. Selection guidance, installation context and full technical detail continue below.
Installation, interfaces, QA controls and preliminary cover and stack screening.
Rev 15 · 21 August 2026 · 27 pagesDownload PDF ↓Technical data sheetM2025 modular stormwater tank systemVariant-specific product data and stated evidence limits for V60, R60 and R45.
Rev 02 · July 2026 · 4 pagesDownload PDF ↓Technical capability flyerM2025 modular OSD tank systemSystem scope, structural pathways, tender support and delivery options.
Issue 1 Rev 2 · 29 August 2026 · 6 pagesDownload PDF ↓Build the tank. Then verify the quote.
M2025 technical capability flyer
Review module geometry, load options, structural evidence boundaries, standard tank interfaces, clean-out provisions, site-specific tender drawings and optional liner and installation support.
PDF · 6 PAGESCommercial modular stormwater systems
Includes product configuration, structural capacity context, virgin and recycled material options, inlet and outlet interfaces, maintenance access and the available project-support package.
Download technical flyerA project-led quote workflow
The module is only one part of a dependable underground tank. We configure the storage volume, footprint, depth, load basis, wrapping and penetrations before calculating and checking the complete project supply.
Required storage, available footprint, outlet depth, proposed cover and surface load.
Module count, tank dimensions, layers, net capacity and preliminary wrapping quantities.
Kontain checks current costs and technical interfaces, confirms the project by phone and then issues the formal quote.
One module. Three system outcomes.
Kontain supplies the M2025 crate assembly with the containment or filtration envelope and project-specific pipe penetrations—not a loose pallet of modules.
Impermeable liner and protective geotextile for controlled storage and discharge.
Typical purposePeak-flow control and downstream capacity management.Permeable geotextile envelope where verified soil and groundwater conditions permit infiltration.
Typical purposeSource control and groundwater recharge.Prefabricated liner, protection layers and formed pipe boots for non-potable reuse systems.
Typical purposeIrrigation, wash-down or process reuse with suitable treatment.M2025 product platform
The assembled module uses opposing structural plates, side panels, top covers and keyed plugs to create a continuous geocellular tank. The modular geometry gives the layout engine a fixed basis for length, width, layers and accessory take-off.
Material and strength options
Polymer grade and published strength class are confirmed against the project load case. Colour is not used as the sole acceptance control; procurement records and batch documentation are required.
Manufacturer-published 45 t/m² class. Feedstock source and equivalent independent structural evidence have not yet been supplied to Kontain.
Manufacturer-published 60 t/m² class. Feedstock source and equivalent independent structural evidence have not yet been supplied to Kontain.
3248R (RP250NQ) virgin PP from Fujian Refining & Petrochemical. Current Intertek evidence applies only to the tested virgin specimen and configuration.
Complete system schedule
Four 500 × 500 mm pieces cover each square metre of exposed vertical tank face.
Top layer only: eight covers per module, equivalent to 16 covers per square metre of roof.
Four per module at every stacked interface; no vertical plugs are installed above the top layer.
Three per module on every layer to key adjacent modules across the tank plan.
Worked component example
Three module layers with 200 modules per layer. The 60 m² of exposed vertical side area requires four side plates per square metre.
Product and component imagery supplied by the M2025 manufacturer.
Controlled installation guidance
The Rev 15 M2025 guide turns the system into a practical set of responsibilities, hold points and inspection records. It now includes standard internal pit and large-pipe interfaces, inlet-impact protection, optional pressure-washing access and preliminary minimum-cover, maximum-cover and five-layer stack screening without replacing the engineer's project-specific design.
Rev 15 structural screening
Completed-surface guide values in millimetres. Apply these minimums with the project-verified maximum cover and final pavement design.
On smaller screens, scroll sideways to view all columns.
| Final surface load condition | Guide basis | VPP60 | RPP60 | RPP45 |
|---|---|---|---|---|
| Open space / light traffic | Open-space / light-traffic screen; verify the actual vehicle load | 600 | 600 | 700 |
| Car park / light vehicles | Preliminary car-park screen; verify vehicle and pavement load case | 700 | 700 | 800 |
| Semi-trailer / heavy-vehicle route | W80 local ULS screen—the highest standard load row | 800 | 800 | Not recommended |
Screening only—not blanket traffic approval. The open-space and car-park values must be checked against the actual vehicle, wheel and axle loads, contact area, dynamics, repetition and pavement. For W80, use VPP60 or controlled RPP60 subject to complete vehicle and global checks. Public-road and other critical loads require a bespoke assessment.
Confirm services, set-out, formation, groundwater and the temporary-works method. Maintain at least 1 m base clearance to the batter toe or shoring, and place any dewatering sump in a widened bay outside the liner, clear strip, bearing zone and batter toe.
Use a permeable nonwoven wrap for approved soakage systems, or a protected LLDPE liner for detention and harvesting. Liner panels, seams and pipe boots are coordinated before concealment.
Verify formation level and planarity, enclosure condition, aligned module columns, all scheduled plugs, perimeter panels, top covers and pipe interfaces before closing the system.
Within 1 m laterally use maximum 100 mm compacted lifts and light compaction only. Place cover through the first 600 mm—or the full cover where less—in 100 mm lifts with no heavy plant, then apply the Rev 15 minimum- and maximum-cover screening tables together with the final project design.
Displace complete modules for an accessible internal pit inside the tank enclosure. Omit side panels at the open pit face, support pipes independently and keep all module load columns intact.
An optional DN50 header installed at tank-floor level inside the module field can feed hydraulically zoned DN25 perforated laterals. Surface-reachable connection and controls remain in the service pit and connect through the open pit face.
The pipe enters an accessible pit formed within the tank and liner footprint. The pipe-to-wall seal and liner-to-smooth-spool boot remain separate, testable details; a removable inlet baffle on pit jambs and floor shoes diverts direct flow away from exposed module columns without liner penetrations.
Surface-reachable isolation, backflow protection, pressure regulation, relief and a gauge sit in the pit. These connect through the pit opening to the DN50 header on the tank floor; flush one designed zone at a time while sediment is removed downstream.
Do not enter the module tank. Inspection, pressure washing and sediment removal are carried out through the designed pits, pipework and accessible surface components.
Reference installation sequence
Manufacturer reference photographs show typical assembly, enclosure and pipe-interface stages. Approved project drawings, inspection records and hold-point releases remain the basis for construction acceptance.
Preliminary design calculator
This tool adopts a 95% hydraulic void ratio, equal to 0.2375 m³ net storage per M2025 module. It rounds the result to complete rectangular module rows and layers.
Submit the configured tank for review
The generated brief provides the quantities and project location needed to check current part rates, liner fabrication, overseas freight, Australian customs and clearance, and metro delivery. Kontain will call before issuing the formal quote.
Preliminary planning output only—not a certified design, drainage calculation, structural design or construction document. Final configuration depends on project drawings, geotechnical conditions, groundwater, construction loading, pipework and authority requirements.
Technical basis
A published short-term compression value is not proof that a tank can be placed beneath traffic. Cover, backfill stiffness, wheel load distribution, groundwater, lateral pressure, construction plant and long-term creep all affect suitability.
Independent laboratory report reviewed
Applicant-supplied virgin V60 samples measuring 1,000 × 500 × 500 mm were tested under a rigid full-surface platen at 20 mm/min. The Intertek report records the method as CIRIA C737-2016 plus client requirements; this is not CIRIA certification or approval.
Results apply only to the tested virgin V60 specimens and reported configurations; supplier batch traceability to current production remains a project acceptance item.
Top loading excluded lateral plates; the lateral surface test included the side plates.
The non-failure result means the short-term tested-sample resistance was greater than the equipment limit. It does not quantify ultimate strength or allowable design resistance.
The report is a performance test, not Intertek product certification, CIRIA approval or proof of 50-year strength.
Interim 90-day creep-deformation observation
One 1,000 × 500 × 500 mm virgin M2025 specimen was preconditioned for 24 hours at 40 ± 2 °C, then loaded with 595 kg through a 300 mm rigid circular centre platen. Displacement was 2.41 mm at day 30 and 2.60 mm at day 91; the highest tabulated reading was 2.63 mm at day 84. The report identifies the method as CIRIA C737-2016 plus client requirements.
On smaller screens, scroll sideways to view all columns.
| Variant | Material / resin source | Nominal module mass | Published class | Current evidence boundary |
|---|---|---|---|---|
| VPP60 (V60) | Virgin 3248R (RP250NQ) random-copolymer PP from Fujian Refining & Petrochemical; manufacturer-declared glass-fibre/additive system. | 12.6 kg | 60 t/m² | Intertek short-term compression and interim creep evidence through day 91 applies only to the tested virgin specimen/configuration. The tonne class and >600 kPa lower bound are not allowable project loads. |
| RPP60 (R60) | Recycled PP; feedstock origin, recycled-content controls, contamination limits and final compound properties not documented in the current evidence pack. | 13.0 kg | 60 t/m² | No equivalent variant-specific independent compression or creep evidence supplied to Kontain. V60 evidence is not transferred. |
| RPP45 (R45) | Recycled PP; feedstock origin, recycled-content controls, contamination limits and final compound properties not documented in the current evidence pack. | 11.0 kg | 45 t/m² | No equivalent variant-specific independent compression or creep evidence supplied to Kontain. V60 evidence is not transferred. |
| All variants | 1,000 × 500 × 500 mm nominal assembled geometry | Manufacturer-quoted nominal masses | Product designations only | Final cover, traffic, tank height, pavement, soil, construction loads, groundwater and allowable deformation require project-specific verification. |
Review creep test duration, extrapolation method, temperature basis, safety factors and allowable strain.
Check founding stiffness, backfill grading and compaction, groundwater and construction-stage stability.
Model cover depth, wheel and axle loads, dynamic effects, pavement build-up and adjacent structures.
Detail liner, geotextile protection, welded seams, pipe boots, access, vents and maintenance.
Product classes and masses are manufacturer-published values. Compression results are summarised from report 260304095GZU-001 and apply only to the tested virgin V60 specimens and stated conditions. The result stopped at the equipment limit rather than failure, so it establishes a lower bound only. Rev 15 also summarises the preliminary predictive screening in TN-M2025-01 Rev 1; its RPP values are calculation assumptions rather than variant-specific test results. The complete reports are available for qualified project review subject to distribution permissions.
Quote verification workflow
Configured tank, module count and accessory schedule
Client inputsCurrent components, ocean freight, customs and clearance
Cost databaseMetro freight for major capital cities or project delivery
Location basisTechnical, commercial and project interface check
Kontain reviewThe system can assemble a preliminary cost basis from the tank configuration and current logistics data. It cannot confirm missing drawings, unusual loads, access constraints, regional freight or incomplete pipe interfaces. Kontain reviews the submission, calls to confirm the project and only then issues the formal quote.
Configure your tankStraight answers
No. It produces a preliminary module arrangement and material allowances. Final drainage, structural, geotechnical and construction design must be completed for the project.
Rev 15 uses 600 mm for VPP60 and RPP60 and 700 mm for RPP45 in open-space/light-traffic applications. The preliminary car-park row is 700 mm for VPP60 and RPP60 and 800 mm for RPP45, but the actual vehicle, wheel and axle loads, pavement and repetition still require project checks. The W80 semi-trailer/heavy-vehicle row uses at least 800 mm with VPP60 or controlled RPP60; RPP45 is not recommended. The standard guide geometry remains capped at five aligned 500 mm layers, or 2.5 m, subject to project-specific verification.
Kontain manufactures against confirmed projects rather than holding finished tank stock. Tanks from approximately 100 m³ can be quoted, but smaller or part-container shipments usually carry higher port handling and freight cost per cubic metre. Final minimums depend on the selected product, component pack and delivery programme.
No. That is a published short-term compression class, not an allowable trafficked-system capacity. Cover, pavement, backfill, creep and load distribution must be checked.
No. The current Intertek compression and interim creep reports through day 91 apply only to the tested virgin V60 specimens and reported configurations. Equivalent variant-specific evidence has not yet been supplied for R60 or R45.
Yes, subject to confirmed tank dimensions, pipe material, diameter, orientation and invert levels. Prefabrication reduces uncontrolled field detailing but does not remove the need for installation QA.
Complete modules are displaced to form an accessible pit inside the tank and liner footprint. Every side panel facing the pit opening is omitted, but the structural module columns and rails remain intact. The pipe, pit, liner boot and wall seal are independently detailed and supported.
Yes, as an optional project-designed maintenance system. The accessible connection and controls sit in the service pit and connect through its open face to a DN50 header installed at tank-floor level inside the module field. The header feeds hydraulically zoned DN25 perforated laterals toward a downstream vacuum pit. Pump duty, pressure, perforations, spacing, restraint and commissioning must be designed for the project.
Yes. The M2025 installation guide covers responsibilities, enclosure options, excavation controls, assembly, liner and geotextile placement, pipework, backfill, commissioning and QA hold points. Approved project documentation still governs construction.
No. It creates the project configuration and quote basis. Kontain checks current supply and logistics costs, confirms the technical inputs with you by phone and then issues the formal quote.
Australian project support
We will turn the preliminary layout into a checked supply schedule, confirm the project with you and issue the formal quote.
