It is a requirement by law that a annual testing of backflow prevention assemblies is undertaken to ensure proper functioning of the assemblies and the safety of our water supply.
Assemblies must be tested annually by a certified backflow prevention assembly tester, the test results must be recorded on a test sheet and a copy of the test is to be sent to Hunter Water, the owner and one kept for by the licensed tester.
If the assembly fails, it must be repaired or replaced and tested again to ensure it functions properly.
In my view it is essential you trust the person testing the device. Please contact us for more information.