Property details
Rainfall collection
Based on the selected roof area and 90% collection efficiency.
Collected water
Tank capacities
Exact 1–100 mm rainfall table
Estimated litres collected for the roof area entered.
| Rainfall | Water falling on roof | Estimated collected water |
|---|
Calculation: rainfall (mm) × roof area (m²) × 90% collection efficiency. Actual collection varies with roof material, gutters, first-flush diversion, overflow and losses.
Enter the property details to generate a recommendation.
Estimated useful rainwater
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Recommended PTQ tank systems
Results are indicative only. Final tank selection must be checked against access,
tank dimensions, site conditions, plumbing and applicable requirements.