Underground rainwater storage helps a site retain runoff close to where it falls while keeping the ground surface available for landscaping, parking or other uses. This modular PP system can be configured for water reuse, controlled stormwater discharge or infiltration as part of a broader sustainable water strategy.
Module Specifications
| Item | Specification |
|---|---|
| Type | Rainwater collecting module |
| Brand / origin | LEIYUAN / Fujian, China |
| Material / color | PP / black |
| Module size | 680 × 410 × 450 mm |
| Nominal volume | 0.125 m³ per module |
| Modules per m³ | 8 |
| Weight | 8 kg per module |
| Working temperature | −30°C to +120°C |
| Compressive strength | 25 tonnes/m² |
| HS code / quality system | 3925900 / ISO 9001:2008 |
Why Store Rainwater Underground?
Capturing rainfall can reduce demand for treated mains water when the stored supply is used for approved non-potable purposes. Underground storage also reduces the visual impact of large tanks and lets designers adapt the footprint around buildings and services. The sustainability benefit depends on correct sizing, durable installation and practical maintenance rather than storage volume alone.
Three Possible Water Functions
For reuse, the modules are wrapped with a sealed geomembrane and connected to suitable filtration, pumping and non-potable distribution. For attenuation, a controlled outlet limits the discharge rate during storms. For infiltration, a permeable geotextile wrap can release water into suitable soil where local conditions and regulations permit.
Design for Long-Term Performance
Tank capacity should respond to rainfall, catchment yield, reuse demand or the permitted discharge rate. The civil design must address soil conditions, groundwater, excavation, base preparation, burial depth, surface loading, backfill and access. Pretreatment, inspection points and a safe overflow route make the system easier to maintain.
Packing Reference
| Component | Packing |
|---|---|
| 680 × 410 mm section | 8 pcs per bundle |
| 450 × 410 mm section | 10 pcs per bundle |
| 20 ft GP reference | Approximately 90 m³ by bundle |
Project Information for Selection
Provide the target storage volume, catchment area, design rainfall, intended function, allowable discharge or reuse demand, footprint, burial depth, surface load and delivery destination.