| Quick facts | Answer |
|---|---|
| Cost range | $85 residential, $125 commercial; $225 same-day emergency |
| Time | Annual testing required by Charleston Water System |
| Who's qualified | State-certified backflow prevention tester with up-to-date DES certification card |
Why can't homeowners do irrigation backflow testing 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 issued by the Department. Certification requires a four-day course plus a proctored practical exam and a written exam. A homeowner without that certification cannot legally perform or file a passing test.
How often is irrigation backflow testing required in Charleston?
Charleston Water System requires annual testing for irrigation backflow devices to stay compliant with local standards. All test reports must be filed with the applicable filing fees through its third-party reporting process. A certified tester handles both the test and the paperwork.
What can a handy Charleston homeowner do themselves?
You can locate your irrigation backflow assembly, clear access to it, and watch for visible leaks or damage between tests. You can also shut off and drain the system if you suspect a problem. The actual test, repairs, and report filing must be left to a certified tester.
When to call a pro for irrigation backflow testing in Charleston
Call a pro right away if your annual test is due, since Charleston Water System requires yearly testing and filing. Also call if the device fails, leaks, or was installed recently and needs its first certification. Same-day emergency residential tests run about $225, while scheduled tests avoid a $45 dispatch fee.
How do you verify a certified backflow tester in Charleston?
Ask the pro for their up-to-date backflow prevention assembly tester certification card issued by South Carolina DES. Certification must be renewed every 3 years, so check the card's date. The state recognizes four tester types: General Tester, Limited Tester, Inspector Tester, and Manufacturer's Agent.
What to do next
- Schedule your annual irrigation backflow test before Charleston Water System's compliance deadline.
- Ask the pro for their up-to-date South Carolina DES backflow prevention tester certification card and confirm the renewal date is within 3 years.
- Request a written quote covering the test, any filing fees, and the third-party report submission to Charleston Water System.
- Book a scheduled test rather than a same-day emergency visit to avoid the $45 dispatch fee.
- 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.



