Backflow FAQs

  1. I received a letter saying my annual backflow test is due. What do I need to do?
  2. I'm a renter, why did I receive a letter about the backflow preventer?
  3. I received a letter saying I need to install a backflow preventer. How do I do that?
  4. Why are backflow preventers tested annually?
  5. Do Backflow Testers work for Charleston Water System?
  6. Who should I contact for more information?
  7. How do I know if I need to install a backflow preventer?
  8. What is backflow?
  9. What is a cross connection?
  10. What causes backflow?
  11. How does Charleston Water System prevent backflow?
  12. What can I do to protect my home plumbing system from backflow?
  13. What is the backflow administration fee?
  14. A backflow preventer was already installed when I moved into this home / commercial space, but I don't think I need it. What should I do?
  15. I don’t use my irrigation system. Do I still have to test and maintain my backflow preventer?
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Watch a Video Explaining Backflow (1:55)