| Quick facts | Answer |
|---|---|
| Cost range | Varies by home - confirm in your quote |
| Time | Annual test; quick for a prepared tester |
| Who's qualified | Holds an up-to-date SC DES backflow tester certification card |
James Island, SC: what's different here
James Island sits in Charleston County, about 6 miles and roughly 10 minutes from downtown Charleston via the James Island Connector and Folly Road. The town is an established suburban infill market, with projections calling for about 160 new housing units over the next 5 years. That growth means more irrigation systems and more annual PVB tests on the books.
Who can do pressure vacuum breaker testing in James Island?
South Carolina requires all backflow testing, including PVB testing, be done by a state-certified backflow prevention tester. The tester must hold a current certification card issued by SC DES, and that certification expires every 3 years. Ask the pro for proof before they start.
How often does a PVB need testing?
South Carolina regulation requires PVB assemblies to be tested after installation and before use, then at least once annually. The tester's differential pressure gauge must be accurate within 2% of full scale or plus or minus 0.3 psi. CHS Backflow refers a local pro who meets these rules.
Where do testers get certified in South Carolina?
SC DES runs a 4-day tester course ending in a proctored written exam and a hands-on practical exam on a double check valve assembly, a PVB, and a reduced pressure principle assembly. A Charleston class is listed at the North Charleston Convention Center, with dates shown as June 9-12, 2026. Certification processing costs $150 per certification.
Why is PVB placement important?
The SC DES study guide says a PVB must sit at least 12 inches above any downstream piping or use. PVBs are designed for backsiphonage only and are not approved for backpressure conditions. A local pro can confirm your setup during the test.
What to do next
- Check that your PVB sits at least 12 inches above downstream piping before the test.
- Ask the tester for their current SC DES certification card - it expires every 3 years.
- Book the annual test required by S.C. Code Regs. § 61-58.7.F, and ask what the quote covers.
- Confirm the tester uses a gauge accurate within 2% of full scale or plus or minus 0.3 psi.
- 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.
