Why do I need to have my assembly tested?

Backflow prevention assemblies are mechanical devices, containing springs and other moving parts that are subject to wearing down and/or breaking. Routine maintenance and testing is necessary to ensure the device is working properly. Washington State law requires assemblies be tested annually. The District has compliance months January 1st through May 31st.  

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1. How do I get my assembly tested?
2. I received a notice in the mail, what do I do?
3. Why do I need to have my assembly tested?
4. What if my assembly fails the test?
5. What if I don’t get my assembly tested?
6. What do I do with the test results?
7. I have my assembly tested every year, but my neighbor says they have never heard of the testing requirements. Why is that?
8. I am not using my irrigation system anymore. Do I still need to test the backflow assembly?