| Quick facts | Answer |
|---|---|
| Cost range | $30.00 filing fee plus $3.50 device fee; labor varies by quote |
| Time | Varies by home - confirm in your quote |
| Who's qualified | A licensed plumber; testing requires a state-certified backflow prevention tester |
North Charleston, SC: what's different here
North Charleston sits in Charleston County, where floodwater entering the sewer system can push sewage back into a home. The county recommends an interior or exterior backflow valve installed by a licensed plumber. The city is about 6 miles and roughly 10 minutes by car from Charleston via the main highway.
Do you need a permit for backflow preventer replacement in North Charleston?
Charleston County says permits are required for all trades and work regardless of value when a specialty contractor does the job, unless the work is under $1,000.00, needs no inspection, and involves one trade. Homeowners doing the work themselves need no permit only if the work is under $1,000.00 and does not require an inspection. Check with the county Building Services Department before starting.
Who can replace a backflow preventer in North Charleston?
Charleston County recommends a qualified, licensed plumber install a backflow valve. South Carolina DES says all backflow testing must be done by a state certified backflow prevention tester holding an up-to-date certification card from the Department.
What does a North Charleston plumbing permit cost?
North Charleston's Plumbing Permit page lists a $30.00 non-refundable application filing fee. Fees also include $3.50 for vacuum breakers or backflow protection devices and $2.00 for one to five each.
How does backflow tester certification work in South Carolina?
Certification requires a proctored practical exam and a written exam, and must be renewed every 3 years. South Carolina recognizes four tester types: General Tester, Limited Tester, Inspector Tester, and Manufacturer's Agent.
How do I request an inspection in Charleston County?
Charleston County Building Inspection Services says all inspections must be requested through the CSS Portal or by email, not by phone. The office is open Monday through Friday, 8 AM to 5 PM.
What to do next
- Ask the pro for proof of a current South Carolina backflow prevention assembly tester certification card.
- Ask the pro to confirm whether your replacement needs a permit and inspection under county rules.
- Get a written quote that itemizes the $30.00 filing fee and the $3.50 device fee.
- Verify the tester's certification renewal date, since South Carolina requires renewal every 3 years.
- 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.
