Allianz - Green Building Council Australia

Rainwater Tanks

Installing rainwater tanks to use for your garden, toilets, and laundry may be a great way to lower your usage of precious drinking water. There are several online calculators that can help you determine a size that best suits your roof area and regional climate with respect to rainfall.

Approvals aren’t usually required for new tanks, but it’s a good idea to contact the local council for any specific requirements. You can also ask if your council area offers a connection to precinct recycled water, often called ‘purple pipe’ (blue pipes for precious water, yellow for gas and purple for recycled water), which can also be used for all your home’s non-drinking water needs.

If you don’t have rainwater tanks, or you’re renting, an easy way to save water is to capture water from your shower or bath (in buckets) which can then be used to water the garden.


Renter information
Water use