| Quick facts | Answer |
|---|---|
| Cost range | $93 to $674; most common project cost is $300 |
| Time | Varies by property - confirm in your quote |
| Who's qualified | A DES-certified backflow prevention assembly tester |
North Charleston, SC: what's different here
North Charleston sits in Charleston County, South Carolina, about 6 miles and roughly 10 minutes by car from Charleston via the main highway. If your installation includes excavation or site disturbance over 5,000 square feet, Charleston County requires a Stormwater Permit through the Public Works Department. Planning around the county's stormwater rules and the city's plumbing permit fees up front helps avoid delays.
Does North Charleston require a permit for backflow assembly installation?
Yes. North Charleston's plumbing permit schedule lists a $30 non-refundable application filing fee, $3.50 for vacuum breakers or backflow protection devices, and $6.00 for installation or repair of water piping. Inspections are usually required before and after the work.
What South Carolina rules apply after installation?
South Carolina requires each assembly to be tested after installation and before use, then at least once a year. Only a state certified backflow prevention tester may do the testing and any repairs. Assemblies must also be on DES's approved list.
When should I schedule installation in North Charleston?
Milder, drier months are typically best for contractor availability and a smoother installation. Booking a few weeks ahead is suggested.
What if my assembly sits in a pit?
South Carolina DES says reduced pressure principle assemblies cannot be installed in a pit that cannot drain by gravity to the ground surface. The relief port must never become submerged, so placement matters before installation begins.
What to do next
- Ask for a written quote that itemizes the $30 permit application fee, device fee, and labor.
- Verify the tester holds a current certification from a DES-approved seminar before work begins.
- Confirm the proposed assembly is on DES's approved list for South Carolina.
- Schedule the required post-installation test before putting the assembly into use.
- 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.
