Water Tanks

Using rainwater can reduce water bills, provide an alternative supply during water restrictions and help maintain a green, healthy garden.

Depending on tank size and climate, mains water use can be reduced by up to 100%.

This in turn can help


Rainwater use

Rainwater collected from a well-designed, well-maintained system can be suitable for all domestic uses. The more uses, the greater the savings in mains water. Bear in mind that the amount of water used for drinking and cooking is relatively small, and that state and territory health departments recommend using the public reticulated water supply for drinking and cooking because it is filtered, disinfected and, generally, fluoridated.
For more information, consult your state or territory health department.

Different end uses each require a different rainwater quality.



Rainwater tanks

Choose a rainwater tank that suits your needs.

Tank size

When deciding the best size for your tank consider:

  • uses to be supplied — maximise the uses of rainwater to get the best value from your rainwater tank
  • average amount of water consumed by these uses — available from your water supplier or try the calculator on the Hunter Water website hunterwater.com.au
  • local rainfall pattern — find the annual rainfall in your area on www.bom.gov.au — in areas with highly variable rainfall, much bigger tanks are required for the same supply of rainwater
  • area of roof draining to the tank — 1mm of rainfall on 1m2 of roof area = 1L of rainwater
  • security of water supply you desire — a larger tank volume leaves fewer periods without rainwater.

Free-standing rainwater pressure supply pumps are available in a range of capacities.