Treatment MeasuresRain Water Tanks : Considerations

Before you decide to install a rainwater tank, you should consider the following:

Decide why you want to install a rainwater tank. Is it to save money on water bills, to help the environment or for fire fighting purposes?
Decide what system you really need, how much water you will get, what the water will be used for, what it will cost and maintenance requirements.
Contact your local council and health department to find out what regulations and restrictions apply in your area.
Contact your Retail Water Company to find out regulations that may apply in your area and for information on rainwater tank suppliers.
If you live in an area prone to bushfires, contact the nearest Country Fire Authority office for information on bushfire protection.

You should be aware that due to the initial costs of the rainwater tank and installation costs, rainwater is more expensive than mains water in the short term.
A first flush device should be installed to protect water quality.
Install a backflow prevention device to protect the mains water supply.
Ongoing maintenance and cleaning is required.

Four factors which principally determine the reliability of rainwater tank supplies are:

Rainfall patterns and depths in your area.
Roof catchment area.
Demand for water. (ie. Number of occupants in household and what is the intended use of the collected rainwater)
Rainwater tank capacity.

These factors need to be considered when identifying your needs for a rainwater tank.

Measures to prevent access to children should be in place to reduce the risk of accidental drinking and entry into the tank.
Cross contamination of reticulated/mains water supply is not permitted.
Installation should be carried out by a certified plumber.

The water tank should undergo regular maintenance and cleaning (check manufacturers' guidelines).