| Quick facts | Answer |
|---|---|
| Cost range | Varies by device and quote - no flat published rate |
| Time | About 45 to 90 minutes per commercial assembly |
| Who's qualified | A tester holding a state-issued backflow prevention assembly tester certification card |
James Island, SC: what's different here
James Island is in Charleston County, about 6 miles and roughly 10 minutes from downtown Charleston via the James Island Connector (SC-30) and Folly Road (SC-171). It is one of the lowest, flattest areas in Charleston, with a maximum elevation of about 18 feet above sea level along Maybank Highway. The area faces extreme flood risk, with 78% of properties likely to be severely affected by flooding over the next 30 years. The median home sale price was $610K over the last 3 months, with homes selling in an average of 53 days.
Who can perform commercial backflow testing in James Island?
South Carolina DES requires all backflow testing to be done by a state-certified backflow prevention tester. That means a person holding an up-to-date certification card issued by the Department. Ask the pro for proof of licence and current certification before the test.
How often do James Island testers renew their certification?
South Carolina certified backflow tester licenses expire every 3 years. Recertification requires a 25-question written exam plus hands-on testing of a double check valve assembly, a pressure vacuum breaker, and a reduced pressure principle assembly. The recertification fee is capped at $50 by state regulation.
What does a commercial backflow test cover?
A standard test takes about 30 to 45 minutes per residential device but 45 to 90 minutes per commercial assembly. Commercial assemblies are bigger and more complex, so budget extra time. Confirm with the pro which assemblies on your property need testing.
How do I become a certified backflow tester near James Island?
South Carolina DES lists a certification training class at the North Charleston Convention Center, with dates shown as June 9-12, 2026. The certification application shows a $150 processing fee. Check the DES Cross Connection Control page for the current class schedule.
What to do next
- Ask the pro for proof of a current South Carolina backflow prevention assembly tester certification card before scheduling.
- Request a written quote that lists each assembly type - double check valve, pressure vacuum breaker, or reduced pressure principle - and the test time per device.
- Confirm your tester's certification is valid, since tester licenses expire every 3 years in South Carolina.
- Check the South Carolina DES Cross Connection Control page to verify certification requirements for your commercial property.
- 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.
