Underground stormwater storage systems become easier to procure when the water route, storage brief, product family, material interfaces and document gaps are visible before quotation.
Before selecting a storage product, choose detention, infiltration, or lined storage/reuse. AQUA provides products, supporting materials and product-related documentation. The project team does the approvals, design, and installation.
Shortlist boundary: a published vertical compression grade is one product datum, not proof of project fit. Lateral loads, cover, traffic, groundwater, flotation, temperature, deformation, support, backfill and interface details still belong in the design review.
An underground detention system stores stormwater runoff below grade and releases it through a defined outlet; the same stormwater detention system should not be treated as a detention basin without checking the hydraulic and maintenance basis.
source: Underground detention, stormwater detention and water storage describe functions, while the supplied product still needs an order-specific configuration.
Vertical grading introduces configuration risk as unit height, storage, layout and interfaces affect the elements of the supplied system. In these comparisons, AQUA considers the family against the given specification and captures assumptions, unresolved inputs, interface, the BOM, relevant documentation and packing instructions.
A published vertical grade is not a substitute for full configuration review. Tank and Module routes are not interchangeable, and the trade-off changes with depth, footprint, loading, groundwater and access; confirm against the project inputs before freezing the shortlist. For underground storage generally, FHWA identifies vehicle loading, pretreatment, inspection and sediment removal as design considerations. source
| Series | Unit size | Void / usable storage | Published selection data |
|---|---|---|---|
| ARW-1050-30 | 1,000 × 500 × 500 mm; 400 mm optional height | 95%; 237.5 L standard / 190 L low height | 30 t/m² owner-confirmed vertical grade; recycled PP |
| ARW-1050-40 | 1,000 × 500 × 500 mm; 400 mm optional height | 95%; 237.5 L standard / 190 L low height | 40 t/m² owner-confirmed vertical grade; recycled PP |
| ARW-1050-45 | 1,000 × 500 × 500 mm; 400 mm optional height | 95%; 237.5 L standard / 190 L low height | 45 t/m² owner-confirmed vertical grade; recycled PP |
| ARW-1050-60 | 1,000 × 500 × 500 mm; 400 mm optional height | 95%; 237.5 L standard / 190 L low height | 60 t/m² owner-confirmed vertical grade; virgin PP |
| ARW-8053 | 800 × 490 × 530 mm | 95%; approximately 197 L | 22 or 30 t/m² published vertical grades |
| ARW-8025 | 800 × 490 × 250 mm | 94%; approximately 92 L | 38 or 50 t/m² published vertical grades |
| ARW-6841 | 680 × 410 × 450 mm | 95%; approximately 119.2 L | Loading basis requires order-specific confirmation |
| ARW-SA-85 | 1,000 × 500 × 85 mm | 95%; 40.375 L | Shallow route; connection detail is project-specific |
| ARW-SA-150 | 1,000 × 500 × 150 mm | 95%; 71.25 L | Shallow route; connection detail is project-specific |
| ARW-SA-200 | 1,000 × 500 × 200 mm | 95%; 95 L | Shallow route; connection detail is project-specific |
| ARW-SA-250 | 1,000 × 500 × 250 mm | 95%; 118.75 L | Shallow route; connection detail is project-specific |
The risk with a unit price comparison is that it conceals the cost of excavation, interfaces and access. Before considering any item a potential deciding factor, one should evaluate the volume of storage, cover, liner/protection build-up, freight and the cost of maintenance.
The risk is document overreach because batch records, submitted-sample reports and project design values have different scopes. AQUA Rain Water’s core molded-product operation incorporates injection molding, batch inspection and in-house compression tests.
Geotextile and geomembrane are supporting procured products coordinated through AQUA’s supply process, not products made on the injection-moulding line.
For each order, the product determines construction, mass or thickness, applicable standard and seam route.
| Document / evidence | Scope before it is relied upon |
|---|---|
| Batch inspection and compression-test records | We can supply applicable records for core moulded products according to the ordered product and batch scope. |
| Submitted-sample third-party reports | These are evidence for submitted samples, not blanket product certification or a project design value. |
| Geotextile / geomembrane records | We record the ordered construction/material, mass or thickness, standard and applicable qualification route. |
| Shipment documents | The applicable product configuration, inspection status, packing record and selected third-party product test reports or company certificates can be supplied according to the product and order. |
The order-specific BOM differentiates what AQUA can provide from details that need to be confirmed and activities that need to be done by others. This avoids leaving pipe openings, access, pretreatment or overflow as an unowned gap. Philadelphia Water Department guidance treats pretreatment, sediment removal and unobstructed maintenance access as site-specific inputs. source
| BOM group | Included / available from AQUA | Order-specific or by others |
|---|---|---|
| Moulded storage units | Tank bodies, side plates, covers, module or shallow panels/supports as ordered. | Series, height, grade, layout, unit quantity and connector count. |
| Connectors and closures | Clips, interlocks, flange covers and applicable accessories. | Layout, tiers, edges and closure requirements. |
| Inlet, outlet and access | ARW-1050 accessory range includes DN200–DN315 side inlet and DN600–DN800 larger inlet/outlet options; a DN800 top inspection accessory is available. | Pipe sizes/elevations, opening detail, inspection route and site interface. |
| Geosynthetics | Engineering geotextile; geomembrane and protection material where specified. | Construction, material, mass/thickness, standard, roll/panel format and seam scope. |
| Construction | Product-related support only. | Excavation, bedding, backfill, drainage design, treatment, pumps, controls and installation. |
Access our professional engineering utilities to estimate storage quantities, define material interfaces, and prepare your project specifications.
Calculate the required module count and footprint based on your target stormwater storage volume.
Storage Quantity EstimatorGenerate a starting material checklist and identify unresolved inputs for detention, infiltration, or reuse systems.
Material Interface Route ToolEnsure all critical site conditions, load ratings, and technical requirements are documented before quotation.
Underground Storage RFQ ChecklistDraw the module arrangement and quantify installed units, panels, clips and wrap for a lined or infiltration route.
Module Layout and BOMThis is a below-ground storage arrangement used for a defined detention, infiltration or lined-storage/reuse route.source Storage volume, water quality treatment and infiltration should be considered as separate project functions.
Yes. Detention controls and releases stored runoff, infiltration starts from a project-supported soil and groundwater basis, and lined storage/reuse retains water behind a specified enclosure.
No. Grade data needs cover, vertical and lateral loads, groundwater/flotation, temperature, deformation, support, backfill and connection conditions before project fit can be reviewed.
The geotextile used for drainage or infiltration routes will be the type indicated for the project. Lock the construction, material, mass, width and filter criteria to the project requirements. Details for bottom placement and wrap will vary depending on the respective jurisdiction, system, and project requirements.
Lined attenuation or storage/reuse routes will use geomembrane plus protection geotextile as indicated on the project. Material, thickness, standard, penetrations, seams, field checks and buoyancy will be defined on a project basis.
The project team defines elevations, hydraulic route, access for maintenance and design details. AQUA will enter the confirmed accessory and material scope on the order-specific BOM. The rest of the work, including excavation, drainage design, liner installation, backfill, treatment, pumps and controls will be done by others.
Procurement requires definition of pretreatment, inspection access, cleanout route and operating responsibility prior to procurement. AQUA can provide a product and interface assessment for these inputs.
Applicable configuration, inspection status, packing record and selected product test reports or company certificates can be supplied according to the product and order. Internal compression testing is not presented as third-party certification.
No single core-module timing statement should be extended to a mixed package. The container and schedule plan depends on the ordered products, destination, material preparation and consolidation requirements.
Include the route, required volume, footprint/depth, cover/load, groundwater, pipe elevations, pretreatment/access, geosynthetic route, destination, schedule and document request. The RFQ checklist tool groups these fields before the supply review.
