| Quick facts | Answer |
|---|---|
| Cost range | $40-$85 residential; $125 commercial; $225 same-day emergency |
| Time | Certification course is 4 days; renewal every 3 years |
| Who's qualified | State-certified backflow prevention tester with an up-to-date certification card |
Why DIY backflow preventer testing is not allowed in Charleston
South Carolina DES requires all backflow testing to be done by a state-certified backflow prevention tester. Certification means passing a proctored practical exam and a written exam, and the certification card must be up to date. A homeowner cannot legally perform or submit the official test.
What a homeowner can do themselves
You can visually inspect your device for leaks, drips or visible damage and keep the area around it clear. You can also confirm when your annual test is due. Anything beyond that - gauge testing and report filing - must go through a certified tester.
When to call a pro for backflow testing
Call a pro for the required annual test, since Charleston Water System requires annual testing with reports filed through its third-party reporting process. Also call if your device leaks, fails a visual check, or your water system flags a missed or failed test. Same-day emergency residential tests cost $225.
How much backflow testing costs in Charleston
One Charleston-area price example lists residential irrigation device testing at $40 and DCVA/RPZ devices at $65 for most Charleston areas. Another lists residential tests at $85 and commercial tests at $125. Ask what device type you have when requesting a quote.
What to do next
- Find your device type (DCVA, RPZ or irrigation backflow) so your quote matches the $40-$85 price examples.
- Ask the tester for proof of an up-to-date South Carolina backflow prevention assembly tester certification card.
- Confirm the tester will file your report with Charleston Water System's third-party reporting process and the applicable filing fees.
- If you want to get certified yourself, check the state DES list for the next tester certification class and the $150 processing 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.
