In South Carolina, the state certifies backflow testers, not the utilities and not a national body. You take a four-day certification course that meets South Carolina Department of Environmental Services (SCDES) standards, pass a written exam and a hands-on exam on a reduced pressure assembly (RP), a double check valve assembly (DC or DCVA), and a pressure vacuum breaker (PVB), and get your SCDES certification. It is good for three years. Then you register with each water utility you plan to file with.
There are no prerequisites. SCDES says experience in a water-related trade is "highly encouraged," and anyone who has sat through the wet lab will tell you why.
Who actually issues the certification?
SCDES. Its cross-connection page is blunt about it: "SCDES must be the certifying agency for all testers in SC." Training providers such as Palmetto Alliance Institute host and teach classes, but the certification you walk out with is the state's.
That matters because South Carolina's drinking water rules, R.61-58.7(F), require every testable RP, DC, and PVB that protects a public water system to be tested by a state-certified tester. Utilities like Greenville Water and Spartanburg Water write the same thing into their own manuals. Greenville Water's Cross Connection Control Manual defines a certified tester as someone holding an up-to-date state tester certification card and approved testing equipment. Spartanburg Water's manual uses nearly identical language.
What happens in the four-day course?
The SCDES course overview covers backflow hydraulics (backpressure versus backsiphonage), the types of assemblies and devices and what each protects against, and hours of hands-on time in a wet lab. By the end you are expected to run the field test on an RP, a DC, and a PVB without the written procedure in front of you.
A few rules worth knowing before you sign up:
- You must be present for the entire course to be certified.
- Plan to study every evening. The overview says so directly.
- The class covers testing and basic troubleshooting. Repair and advanced troubleshooting are separate courses offered by other organizations.
- Meals are on you.
Palmetto Alliance's Seneca listings add that to be certified you must "own or have clear access to the appropriate testing equipment," though you don't have to buy a gauge before the class. Their course also carries 15 hours of CEU credit.
SCDES publishes the test procedures it expects you to follow, for both three-valve gauges and five-valve gauges. Read them before day one.
Where are classes held, and what do they cost?
SCDES lists its sponsored certification classes on its cross-connection page. The 2026 schedule includes sessions in West Columbia, North Charleston, and Seneca, the closest to Greenville, Spartanburg, and Easley. As of this week, every 2026 certification class on that list is marked FULL, including the October 20–23 class in West Columbia and the December 8–11 class.
So the practical first step is the SCDES waiting list form linked on that page. When a seat opens, SCDES notifies people on the list by email or phone with a registration link.
On cost, we can only point to what providers publish. Palmetto Alliance Institute listed its Seneca certification course in September 2026 at $499, and the April 2026 Seneca class at $449. Both sold out. Budget separately for a differential pressure gauge and its yearly calibration.
What type of tester certification do you need?
The SCDES application describes four classifications:
- General Tester: tests assemblies for the general public. This is what most plumbers, irrigation contractors, and independent testers need.
- Inspector Tester: same qualifications, but employed by a municipality, water district, or other public water system, usually running a backflow program rather than selling testing.
- Limited Tester: tests only assemblies owned by their employer, such as a facilities tech at a hospital or plant.
- Manufacturer's Agent: tests as part of representing a particular backflow prevention company.
If you plan to take calls from property managers and businesses, you want General.
What are the numbers you'll be tested on?
The SCDES recertification study guide is written for renewals, but it's a good preview of what SCDES cares about:
- DCVA: both check valves must hold tight at 1.0 psid or greater.
- RP: the first check must read 5.0 psid or greater, the second check 1.0 psid or greater, and the relief valve must keep the zone at least 2.0 psid below supply pressure.
- PVB: installed at least 12 inches above any downstream piping or use, and approved for backsiphonage only.
- Fire lines: a DCVA at minimum, and an RP when antifreeze, foaming agents, or an auxiliary water supply is tied in.
The guide also says to check the tightness of the #2 shutoff first on both the RP and the DCVA. If water is moving through the assembly, readings come in high and you can record a false pass. SCDES's recent letter to testers singles out the #2 shutoff check on DCVAs as "a very important step many are missing."
How does recertification work?
Your certification expires every three years. To renew, you pass a 25-question written exam and test a DCVA, a PVB, and an RP in a wet lab with your own gauge. SCDES requires that gauge to read within 2% of full scale or ±0.3 psid, and to be certified or calibrated every year. Charleston Water System's recertification letter adds that you need at least 70% on each part and must bring the gauge's current calibration report.
You have two options: test at an SCDES recertification station, or retake the full four-day course. SCDES says there are no reciprocity recertifications.
For Upstate testers, the SCDES list of recertification stations includes Palmetto Alliance Institute for Oconee, Pickens, and Anderson, clinics at Inman Campobello Water for the Spartanburg area, and Greenwood CPW. Palmetto Alliance has a December 3, 2026 refresher and exam in Seneca listed at $125, with gauge calibration available on site for $98. Charleston Water System charges $80, which includes a $30 administration fee.
What if you're already certified in another state?
SCDES says there is currently no direct reciprocity with any training provider. A tester certified elsewhere sends an application to SCDES, then attends and passes an SCDES one-day class with written and practical exams. The application form lists a $175 fee for the class and processing, and asks for a copy of your current certificate (not the wallet card) plus your current gauge certification.
Palmetto Alliance advertises that South Carolina now reciprocates with its University of Florida TREEO class certification. If that's your route, confirm with SCDES before you book.
You're certified. How do you start filing in the Upstate?
Certification lets you test. Each utility still has its own intake.
Greenville Water. Its backflow prevention page asks new testers to email a picture of their certification to bfp@greenvillewater.com. Results are uploaded through Greenville Water's portal. Greenville Water doesn't install or test assemblies itself, and it randomly retests assemblies to check on testers.
Spartanburg Water. The manual describes an approved tester as an independent contractor certified by SCDES, and it rejects any report that is incomplete or illegible. Use its current field test and maintenance report. Failed tests have short clocks there, so read the manual before your first job.
Easley Combined Utilities. Its public pages don't lay out tester intake in detail. Call the main office (864-859-4013) to confirm how they want reports submitted before you file.
Our earlier post on how often backflow testing is required in Upstate SC covers each utility's notice and late-fee schedule.
Where Psid helps once you're testing
Once you are certified and running tests, Psid lets you enter your RP, DC, and PVB readings and fills the published test report PDFs for Greenville Water, Spartanburg Water, and Easley Combined Utilities. You still review, sign, and submit each report yourself, and Psid doesn't approve anything on behalf of a utility. It starts with a 14-day free trial, then $49 a month or $470 a year on the pricing page.
If you have questions about your certification status or class openings, the SCDES cross-connection contact is Steve Fox at (803) 898-4426.
Questions
How long does it take to get backflow certified in South Carolina?
The SCDES tester certification course runs four days, and you must be present for all of it. You take a written exam and a proctored hands-on exam at the end. The harder part is getting a seat. Every SCDES-listed 2026 certification class shows as full, so join the SCDES waiting list and watch training providers for new dates.
How much does backflow tester certification cost in SC?
Prices are set by the training provider. Palmetto Alliance Institute listed its Seneca certification course at $449 for April 2026 and $499 for September 2026. You also need a differential pressure gauge, either your own or one you have clear access to, and SCDES requires gauges to be certified or calibrated every year.
How often do South Carolina backflow testers have to recertify?
Every three years. Recertification is a 25-question written exam plus wet-lab tests on a double check valve assembly, a pressure vacuum breaker, and a reduced pressure assembly, using your own gauge. You can recertify at an SCDES recertification station or retake the full four-day course.
Does South Carolina accept a backflow certification from another state?
Not directly. SCDES says it must be the certifying agency for every tester in the state. A tester certified elsewhere applies to SCDES and must pass a one-day SCDES class with a written and practical exam. The application lists a $175 fee and asks for a copy of your current certificate and your current gauge certification.
What do I need to do before testing for Greenville Water?
Greenville Water asks testers who are new to its system to email a picture of their certification to bfp@greenvillewater.com. After that, test results go through Greenville Water's online portal.