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I received a letter saying my annual backflow test is due. What do I need to do?
I'm a renter, why did I receive a letter from CWS about the backflow preventer?
I received a letter saying I need to install a backflow preventer. How do I do that?
Why do backflow preventers have to be tested annually?
Do Backflow Testers work for Charleston Water System?
Who should I contact for more information?
How do I know if I need to install a backflow preventer?
What is backflow?
What is a cross connection?
What causes backflow?
How does Charleston Water System prevent backflow?
What can I do to protect my home plumbing system from backflow?
What is the backflow administration fee?
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?
I don’t use my irrigation system. Do I still have to test and maintain my backflow preventer?
Watch a Video Explaining Backflow (1:55)
Overview of Backflow Prevention
Approved Tester List
Information for Installers
Information for Testers
How to Become a Tester
Documents & Forms