| Quick facts | Answer |
|---|---|
| Cost range | Varies by home - confirm in your quote |
| Time | Testing must be done at least once annually |
| Who's qualified | A tester holding an up-to-date state certification card issued by the Department |
Johns Island, SC: what's different here
Johns Island is in Charleston County, South Carolina, about 12 miles and roughly 19 minutes by car from Charleston via the main highway. The area shares Charleston's humid coastal climate and frequent heavy rainfall, which raises cross-connection risk for water systems and irrigation connections. The state tester list shows certified backflow testers with Johns Island addresses and phone numbers, so local help is available.
Who can perform double check valve testing in Johns Island?
South Carolina requires all backflow testing, including double check valve assemblies, to be done by a state certified tester. A certified tester holds an up-to-date certification card issued by the Department. Certification is earned after a proctored practical exam and a written exam.
How often is double check valve testing required?
State rules under S.C. Code Regs. § 61-58.7.F require a double check valve assembly to be tested after installation and before use by the customer. After that, it must be tested at least once annually unless a specific exception applies.
How do Johns Island testers stay certified?
Every certified backflow tester's license expires every 3 years. To renew, a tester must pass a written exam with a score of 70% or higher and perform prescribed tests on an RP assembly, a double check valve assembly, and a pressure vacuum breaker. A recertification fee of up to $50.00 is allowed.
Why is annual testing important on Johns Island?
Charleston's humid coastal climate and frequent heavy rainfall raise cross-connection risk for water systems and irrigation connections. That makes the annual test especially important for Johns Island properties. Johns Island sits in Charleston County, about 19 minutes by car from Charleston.
What to do next
- Find your double check valve assembly and note when it was last tested.
- Ask any tester for proof of a state backflow prevention assembly tester certification card issued by the Department.
- Get a written quote that covers the annual double check valve test and any required paperwork.
- Confirm the tester's certification does not expire within the next 3-year cycle.
- 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.
