A rooftop rainwater collection and storage system captures roof runoff, removes debris and sediment, and stores the treated water in a modular underground tank. It gives buildings a practical non-potable water source while reducing the volume and peak rate entering drainage networks.
Product Specifications
| Item | Specification |
|---|---|
| Type | Rainwater collecting module |
| 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 | 3925900 |
| Quality system | ISO 9001:2008 |
Roof-to-Tank System Design
The PP modules provide the underground storage volume, while the complete system also requires correctly sized gutters and downpipes, leaf screens, first-flush or filtration equipment, inlet calming, overflow, pump controls and a clearly separated non-potable distribution line. Storage capacity should reflect roof area, local rainfall, demand and available space.
Where the System Is Used
Common reuse applications include landscape irrigation, external cleaning and toilet flushing where permitted. The modular tank can fit beneath landscaped zones or other approved surfaces, freeing above-ground space. Water quality, backflow prevention and maintenance requirements must follow local regulations and the intended end use.
Installation Principle
Prepare the excavation and structural base to the engineer’s design, assemble the interconnecting modules, then wrap the tank for its intended function. A permeable geotextile configuration supports infiltration; a sealed geomembrane configuration supports storage and reuse. Inlets, outlets, pretreatment, inspection access, ventilation, backfill and cover depth must be specified for the site.
Project and Shipping 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 |
B2B Project Support
Leiyuan has produced plastic gardening and water-management components since 2008. To review a project, provide the required storage volume, catchment area or design flow, intended function, burial depth, surface load and delivery destination.
