Install a rainwater tank to collect and store rain hitting your roof and use it to water your garden, wash your clothes or fill your toilet.
By capturing and using the rain that falls on our houses - water that currently flows into the stormwater drain - we are taking another step in increasing our water efficiency and conserving this precious resource. Have a plumber redirect your down pipes into a tank for storage and install pumps and pipes to service some of your household water needs. By these simple actions, most Australian households would save at least 45,000 litres and hundreds of dollars each year.
Investigate the benefit of installing a rainwater harvesting system in your home, explore government rebates and think medium to long term.
Potential estimated average annual capture amount (KL) = roof area (in square metres) x local average annual rainfall (in millimeters)/1000
The Alternative Technology Association has developed Tankulator, a useful online calculator for determining the optimum water tank size for your specific location, roof area and usage profile.For example, a roof area of 250m2 in an area that receives annual rainfall of 600mm will be able to capture 150,000 litres per annum. Assuming the rainfall is spread evenly over the year, i.e. 12,500 litres per month, and regular use of this water is in toilets and garden watering, a 25,000 litre capacity tank may be sufficient to maximise water capture. However, if the rainfall pattern over the year was more skewed to certain months (i.e winter) then the tank size would need to increase to store more water for the dryer periods.
The Bureau of Meteorology website list the annual, monthly and seasonal rainfall averages for most parts of Australia.
Developing an understanding of your monthly average rainfall capture will enable you to identify what sized tank will maximise your rainwater capture and reuse.
Fresh water is the lifeblood of nature. Without it, we would not have clean air, food, drink and many aesthetic and recreational benefits. Therefore, we need to ensure we use water in a sustainable way - we need to share it with all life on the planet and respect and value this "lifeblood".
Rivers and wetlands need sufficient water to survive and prosper. By using water more efficiently and reusing it wherever possible, we can play our part in improving local water availability and quality. Significant energy is invested in providing water services and through harvesting your own water you’re also contributing to lower carbon emissions over time.