Rainwater tanks are a good investment even in areas of light to moderate rainfall. A tank can collect up to 800 litres of water from as little as 10mm of rainfall. For an average family, the water used from tanks can cut their yearly water consumption up to 25 to 30 per cent.
Rainwater tanks vary in cost depending on the size of the tank and any extras you require.
Polyethylene tank's retail from between $700 and $900 for a 2,000 litre tank, with a 4-5,000 litre polyethylene tank costing $1,000 and $1,250.
Bigger is not necessarily better. If you experience frequent rainfall, a smaller tank will refill itself regularly, but if you need your rainwater tank to supply you with water through longer dry spells, a larger tank might be better. Your local rainwater tank supplier can help you determine the right size tank for your home and climate.
Government rebates are available in many parts of Australia. In Sydney, for example, rebates are available and council approval is not needed to install rainwater tanks with capacities of less than 10,000 litres.
