Backflow prevention and annual testing explained
Every property on Hunter Water's supply needs backflow protection. What the hazard ratings mean, which devices need a yearly test, and who is responsible.
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Key takeaways
- Every property connected to Hunter Water's supply must be risk assessed and have a suitable backflow prevention device.
- Hunter Water's 20 mm and 25 mm meters include a low hazard device, so a low hazard property on one needs nothing extra.
- Medium hazard sites need a testable double check valve and high hazard sites a reduced pressure zone device, installed straight after the meter.
- Testable devices must be tested when installed and every year by an accredited tester, and registered with Hunter Water. The owner is responsible.
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