Why you should install a rainwater tank
- More than enough water falls on most average size house roofs each year to supply all household water needs
- Because it reduces the storm water running into the ocean with the pollutants it collects along the way
- Many councils around Australia will require that you do it as part of any new building or substantial renovation
- The water you collect can safely be used for anything from garden watering, toilet flushing, clothes washing to showering, kitchen and drinking
- The less mains water you (and everyone else) uses the less energy is spent building and operating new dams/water desalination plants
- Your tank size will depend on how much water you use and how much you can collect
- How much water you can collect will be determined by your roof area and the average annual rainfall of the area in which you live
- How much you use will depend on how many services you decide to connect to your rainwater tank and your usage patterns. You can gain a basic understanding of your water consumption from your quarterly water bills.
- Both of the books below provide charts to help you calculate tank sizes. Stratco provide an online tank sizing tool.
Maintaining water quality
A number of products are available that passively assist in maintaining the quality of the water in your tanks:
Rebates are generally subject to tank size and the number of services connected. In most states rebates are not available where tank installation is part of a major renovation (eg subject to council requirement/approval).
- National: National Rainwater and Grey water initiative provides up to $500. Independent of state based grants.
- ACT: Up to $1000 subject to tank size and requires at least one internal service connected
- NSW: Up to $1500 subject to tank size and number of services connected.
- NT: Up to $1900 subject to tank size, number of services, installation of new guttering.
- QLD: No state based rebates available. See National above.
- SA: Up to $1000 subject to tank s
- TAS: No state based rebates available. See National above.
- VIC: Up to $1000 subject to tank size and number of services connected
- WA: No state based rebates available. See National above
Where to buy