Backflow prevention

All properties connected to Sydney Water's supply must install a backflow prevention containment device appropriate to the property's hazard rating. This reduces the risk of any contamination from a property flowing back through connections to the water supply system.

Only licensed plumbers can install a backflow prevention containment device.

Only licensed plumbers with backflow prevention accreditation issued by a registered training organisation can inspect, commission and test backflow devices.

Before you install a backflow prevention device, you should check the available water pressure and the customer's pressure and flow requirements. A site assessment should also be done to confirm the hazard rating of the property and its services.

If you need further information, please email the Backflow Prevention team.