| Quick facts | Answer |
|---|---|
| Cost range | $50 to $200 per device; some Charleston-area tests as low as $65 |
| Time | Varies by device - confirm timing in your quote |
| Who's qualified | A state certified backflow prevention tester with a current certification card from South Carolina DES |
Mount Pleasant, SC: what's different here
Mount Pleasant is in Charleston County, South Carolina, about 10 miles from Charleston. The town has a humid subtropical climate, with around 50 inches of annual precipitation. Average annual high temperatures sit in the mid 70s and average annual lows in the mid 50s. That short drive from Charleston means local testers regularly work both communities.
Why does rpz valve test pricing vary near Charleston?
Backflow testing in South Carolina listings commonly falls in the $50 to $200 per device range, and RPZ assemblies generally cost more to test than double check valve assemblies. One Charleston-area listing shows standardized RPZ/DCVA test pricing of $65. Another South Carolina listing says most residential backflow tests run $50 to $250 per device, depending on assembly type and local filing fees.
Who can perform an rpz valve test in Mount Pleasant?
South Carolina requires all backflow testing to be done by a state certified backflow prevention tester. The South Carolina Department of Environmental Services defines a certified tester as a person holding an up-to-date backflow prevention assembly tester certification card issued by the Department. Ask the pro for proof of this certification before the test.
How do I find a certified backflow tester near Charleston?
The South Carolina Department of Environmental Services maintains a listing of certified backflow testers for people looking to get a backflow device tested or inspected. You can check that state list to confirm a tester's certification. A free referral service can also connect you with a licensed, insured local backflow tester.
How does someone become a certified backflow tester in South Carolina?
The state certification application lists a $150.00 certification processing fee. South Carolina DES also lists a Charleston training class for tester certification at the North Charleston Convention Center, with dates shown as June 9-12, 2026. Certification is required before anyone can legally perform backflow tests in the state.
What to do next
- Confirm your device type is an RPZ assembly, since RPZ tests generally cost more than double check valve assembly tests.
- Check the South Carolina DES listing of certified backflow testers to verify the tester's certification card is up to date.
- Ask for a written quote that states the per-device price and any local filing fees before the test.
- Compare quotes against the $50 to $200 per device range typical for South Carolina backflow testing.
- 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.
