How can I find a BAT to test my assembly?

For the convenience of City residents, the City maintains a list of testers. This is merely a list of companies who have submitted tests and certification information to our office. Many plumbing and irrigation contractors listed in the phone book can provide certified backflow assembly testing. For more information please contact the Public Works Department at 425-831-4919.

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1. What are "cross-connections" and "backflow"?
2. What causes backflow?
3. What problems can result?
4. Can cross-connections be avoided?
5. What is an "Approved Backflow Prevention Assembly"?
6. Do I need a Backflow Prevention Assembly at my home?
7. What if I have a Backflow Prevention Assembly?
8. How can I find a BAT to test my assembly?
9. What regulations apply to Cross-Connection Control?