| Quick facts | Answer |
|---|---|
| Cost range | $40 - $125 |
| Time | Varies by device type and testing scope |
| Who's qualified | State-certified backflow prevention tester |
Why is annual backflow certification required in Charleston?
Charleston Water System requires annual testing for backflow prevention. All reports must be filed with the applicable filing fees through the system's third-party reporting process. South Carolina DES mandates that all backflow testing must be done by a state-certified backflow prevention tester.
What does backflow tester certification involve?
Certification is earned after a proctored practical exam and a written exam. Testers must renew their certification every three years. Recertification can require a 25-question written exam plus wet-lab testing of specific valve assemblies.
Where is backflow tester training available near Charleston?
Certification training classes are available locally in the Charleston area. One listed class is held at the North Charleston Convention Center. Another training option is offered at Midlands Technical College.
How do different device types affect the cost of annual backflow certification?
The cost varies depending on the type of device being tested. Standard residential irrigation testing is listed at $40. Testing for DCVA or RPZ assemblies is listed at $65, while commercial tests are listed at $125.
What to do next
- Verify that the local pro holds an up-to-date backflow prevention assembly tester certification card issued by the Department.
- Ask the pro for a quote that specifies the type of test (e.g., residential vs. DCVA/RPZ) to ensure accurate pricing.
- Confirm the testing meets the requirements of Charleston Water System for annual reporting.
- Ensure the tester's certification is current, as it must be renewed every three years.
- Call (843) 286-4721 or email [email protected] for a free quote from a licensed, insured local backflow tester.
CHS Backflow is a free referral service: an independent contractor does the work and may pay us a referral fee. You never pay us anything.



