Rainwater Harvesting Systems for Australian Properties

Sizing Your SystemA 200m² roof in Sydney (average 1,200mm annual rainfall) can theoretically capture 240,000L per year. In practice, a 5,000–10,000L tank captures the most useful portion. In Perth and Adelaide (Mediterranean climate), a larger tank (15,000–25,000L) captures the concentrated winter rainfall for use through the dry summer.First Flush Diverters: Essential EquipmentThe first 20–25L of rain washes bird droppings, dust, and debris from the roof surface — water that should not…