Backflow prevention devices | Redland City Council

Backflow prevention devices

A backflow prevention device prevents the reverse flow of water and protects drinking water quality from contamination.

When you need a device

A backflow prevention device is required on your property if you have:

  • an irrigation system
  • fire hose reels or hydrants
  • commercial or industrial activity
  • machinery connected to the mains.

Council is required to maintain a register of backflow prevention devices under the Plumbing and Drainage Act 2002. The device must be inspected or tested by a licenced plumber at least once a year.


  • A registration fee is payable for a backflow prevention device (payable at installation).
  • An annual registration fee payable for all devices on properties.

Visit the Department of Housing and Public Works for further information and to download the Approved Plumbers and Drainers forms.