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Owning a rainwater tank

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Conserve water and save money with a rainwater tank. Get advice on selecting the right tank for your home.

A rainwater tank located at the side of a home, with a hose connected to tank's tap.

Why choose a rainwater tank? 

Conserves water

Saves money on your water bill

Eco-friendly

Reduces erosion from rain runoff

Stores excess rainwater

Water source for home and garden

Lessens need for new or replacement water infrastructure

Selecting the right tank

There are some factors you’ll need to consider when selecting a rainwater tank.

Approvals

Depending on where you live, the size of your rainwater tank and where you want it located, you may need: 

  • planning approval 
  • plumbing approval 
  • building approval. 

You may also need to comply with requirements for the Bushfire overlay code and rainwater tanks connected internally.

Learn more about what approvals you need to install a rainwater tank.

Maintaining and cleaning a rainwater tank

Regular maintenance of your rainwater tank is recommended. Additional maintenance checks should be undertaken following a storm.

This includes all apparatus, fittings or pipes for supplying water to the premises.

Take the following measures to maintain your rainwater tank.

  • Keep your roof clear of large tree branches.
  • Clear leaves and debris from downpipes.
  • Check inlet and overflow screens are securely in place, are in good condition and cleaned regularly.
  • Install a first flush diverter which stops the initial flow of water from your roof from entering the tank.
  • Open and clean out first flush devices after rain.
  • Check the tank and fittings regularly for leaks.
  • Replace cartridges in water filters and chemicals or components in water treatment units strictly according to manufacturer’s instructions.
  • Check sludge levels in the bottom of the tank every 2 to 3 years or if you notice any sediment in the water.
  • Remove sludge before the layer builds to the level of the tank outlet – usually once every 5 to 10 years.
  • Avoid using harsh cleaning products that may contaminate your rainwater.

Frequently asked questions