Mount Pleasant, SC

Double Check Valve Testing in Mount Pleasant, SC

Short answer

Double check valve testing in Mount Pleasant costs about $75-$150 residential and $125-$250 commercial, and takes roughly 20-30 minutes. Call CHS Backflow at (843) 286-4721 for a free referral to a licensed, insured local tester.

Updated October 26, 2026 2 min readLeer en español

Quick answer

CHS Backflow is a free referral service for backflow testing in Charleston, SC: call or text (843) 286-4721 (our assistant answers 24/7 in English or Spanish; callbacks Mon–Fri, 8am–5pm ET) and a vetted local pro calls back within the hour during business hours; backflow repair or rebuild kit: typically $150–$400; serving Charleston, Mount Pleasant, North Charleston, Summerville, James Island, Johns Island.

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Quick facts Answer
Cost range $75-$150 residential, $125-$250 commercial
Time About 20 to 30 minutes
Who's qualified South Carolina state-certified backflow prevention tester with a current certification card

Mount Pleasant, SC: what's different here

Mount Pleasant sits in Charleston County, about 9 miles and roughly 15 minutes by car from Charleston via US-17. The town has a humid subtropical climate with around 50 inches of annual precipitation, average annual highs in the mid 70s, and essentially no snowfall. Local water systems rely on certified tester paperwork to stay compliant.

Who can perform double check valve testing in Mount Pleasant?

South Carolina requires all backflow testing, including double check valve assemblies protecting a public water system, to be done by a state-certified backflow prevention tester. A certified tester holds an up-to-date certification card issued by the South Carolina Department of Environmental Services. Ask the pro for proof of certification and insurance before the test.

What does the testing fee cover?

The testing fee usually covers the test itself, while repairs are billed separately. If a double check valve fails, ask the pro for a repair quote in writing before approving extra work. Your quote should also state who submits the passing test paperwork.

How does a tester stay certified in South Carolina?

A South Carolina backflow prevention tester certification expires every 3 years. To renew, the tester must pass a written exam and perform prescribed tests on a double check valve assembly, a pressure vacuum breaker, and a reduced pressure principle assembly. Certification also requires a hands-on lab test and a written exam.

How fast must test paperwork be filed?

A cross-connection manual from a nearby Charleston-area utility says a certified backflow tester must submit passing test paperwork within 7 days after testing. Confirm your tester will file on time so your water system has the record it needs.

What to do next

  1. Confirm the tester holds an up-to-date South Carolina DES backflow prevention assembly tester certification card.
  2. Ask the pro for proof of licence and insurance before the double check valve test.
  3. Get a written quote stating the test fee and that repairs are billed separately.
  4. Ask the tester to submit passing test paperwork within 7 days after testing.
  5. 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.

Related answers

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Quick answers

How long does a double check valve test take?

Testing a double check valve takes about 20 to 30 minutes, according to a 2026 industry article. The testing fee usually covers the test itself, with repairs billed separately.

Who is allowed to test backflow in South Carolina?

South Carolina 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 of Environmental Services.

How often must a tester renew certification?

A South Carolina backflow prevention tester certification expires every 3 years. Renewal requires a written exam and prescribed tests on a double check valve assembly, a pressure vacuum breaker, and a reduced pressure principle assembly.

How much does tester training cost in South Carolina?

A backflow tester training course at Midlands Technical College lists tuition of $699.00 and requires attendance for all four days of training. The state charges a $150.00 certification processing fee.

Backflow testing help in Tulsa

CHS Backflow is a free referral service connecting you with licensed, insured local backflow testers in Charleston and nearby areas. The pros we refer perform all work and may pay us a referral fee. We do not perform work or hold licenses. You pay no fee to us and may get other quotes.

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