All properties connected to our water supply system are required to be risk assessed and have an applicable site containment backflow prevention device installed. The risk assessment should address the requirements of our Site Containment Backflow Prevention Standard to determine if the property is a high, medium or low hazard risk to the drinking water supply.

Backflow prevention refers to the control of potentially harmful contaminants entering into our drinking water supply from cross connections in a customer’s premises or backflow of contaminants into the water supply system.

Yes. If the property owner considers the risk rating assigned to the property is higher than the risk of site-specific activities being carried out, then they may appeal this rating.

Backflow risk can be classed as low, medium or high as provided in our Site Containment Backflow Prevention Standard and Australian Standard AS/NZS 3500 Plumbing & Drainage.

The hazard rating of the site's operations and processes determines which type of device you are required to install. If the hazard rating varies due to multiple processes, you must apply the highest hazard rating.

The hazard rating of the site's operations and processes determines which type of device you are required to install. If the hazard rating varies due to multiple processes, you must apply the highest hazard rating.

If you need more advice on backflow prevention devices, installation, testing or accreditation, get your questions answered by contacting our team.

Backflow prevention devices are required under our Site Containment Backflow Prevention Standard, Australian Standards AS/NZS 2845: Water Supply – Backflow Prevention and AS/NZS 3500: Plumbing and Drainage for any property or operations that pose a risk to the public drinking water supply.