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Regular Backflow Testing Requirements
Why does the Backflow device have to be tested after installation, or repair or maintenance performed on the Backflow Valve at least every 12 months?
Devices need to be tested periodically to ensure that they are functioning properly. This is a requirement of the manufacturer and it takes account of the fact that the internal seals, springs and moving parts are subject to fouling, wear or fatigue. Testing requirements are identified in Australian Standard AS 2845.3:1993 and the AS/NZS 3500.1:2003, which are both referenced by the SA Water regulations.
Annual Testing
Each Backflow Prevention Device must be tested on an annual basis. This is a condition of connection to the water supply. It means that the Backflow Device is maintained and continues to operate effectively.
The annual test will ensure the drinking water supply is protected from Backflow.
If a Backflow Device is defective or faulty, it may:
- not prevent a contaminated source entering the drinking water supply
- cause water to be wasted through leaking devices
- impact on the water pressure supplying your property


