| Quick facts | Answer |
|---|---|
| Cost range | Varies by home - confirm in your quote |
| Time | Testing is required at least once annually |
| Who's qualified | A state certified backflow prevention tester per South Carolina DES |
Johns Island, SC: what's different here
Johns Island is in Charleston County, South Carolina, and sits about 12 miles from Charleston - roughly a 19-minute drive via the main highway. The island's residential lawn irrigation systems rely on testable backflow assemblies to protect the public water supply. Local water systems maintain active cross-connection control programs and keep records of every assembly and test result.
How often is sprinkler system backflow certification required on Johns Island?
A new backflow prevention assembly must be tested immediately after installation and before customer use. After that, South Carolina Regulation 61-58 requires testing at least once annually by a certified tester. Your water system's low-hazard lawn irrigation policy sets the minimum frequency.
Who can perform sprinkler system backflow certification in Johns Island?
All backflow testing must be done by a state certified backflow prevention tester, meaning someone holding an up-to-date certification card issued by South Carolina DES. The state recognizes four tester categories: General Tester, Limited Tester, Inspector Tester, and Manufacturer's Agent.
How long does a South Carolina backflow tester certification last?
The standard certification is valid for 3 years from the date of issue. To renew, a tester must pass a written exam with a 70% score and perform prescribed tests on approved assemblies.
What equipment and assemblies must meet SC DES rules?
Backflow prevention assemblies must be on the SC DES list of approved assemblies. Test equipment must be calibrated or certified annually, use a 0-15 psid scale, and meet USC Foundation for Cross-Connection Control recommendations. Your water system keeps records of assemblies and test results.
What to do next
- Confirm your assembly is on the SC DES list of approved backflow prevention assemblies.
- Ask the pro for proof of a current South Carolina DES tester certification card (valid 3 years).
- Request test equipment details in your quote, including the required 0-15 psid scale and annual calibration.
- Schedule the test annually, or sooner if your water system's irrigation policy requires it.
- 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.
