| Quick facts | Answer |
|---|---|
| Cost range | About $50 to $250 per assembly in South Carolina |
| Time | Varies by system - confirm timing in your quote |
| Who's qualified | A state-certified backflow prevention tester with a current DHEC-issued certification card |
What device does South Carolina require on fire sprinkler lines?
South Carolina requires fire line sprinkler systems to be protected by at least an approved double check valve assembly. If antifreeze, foaming agents, or an auxiliary water supply is connected, a reduced pressure backflow prevention assembly is required instead.
Who can perform a backflow test in Charleston?
South Carolina DES requires all backflow testing to be done by a state-certified backflow prevention tester holding an up-to-date certification card from the Department. Charleston Water System also requires annual testing with reports filed through its third-party reporting process. Ask the pro for proof of certification before hiring.
What standards apply to fire sprinkler backflow tests?
South Carolina law says backflow tests for sprinkler systems must follow applicable NFPA standards. Charleston's underground fire-service permit also requires means to conduct full forward-flow testing of the backflow prevention device, with acceptance meeting NFPA 24 requirements.
How does a tester earn certification in South Carolina?
Tester certification requires a 4-day DHEC-approved course, followed by passing both a hands-on lab test and a written exam. Certification is renewed every 3 years after a written exam with a passing score of 70% and a practical test. The recertification fee cannot exceed $50.
What to do next
- Confirm your assembly type - a double check valve assembly or a reduced pressure assembly if antifreeze or an auxiliary water supply is connected.
- Ask the pro to test to applicable NFPA standards, including NFPA 24 forward-flow requirements on new fire service lines.
- Verify the tester holds a current state certification card before the test.
- Request a written quote covering the filing fee Charleston Water System requires through its third-party reporting process.
- 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.
