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Cross Connection Control and Backflow Prevention

Law and Regulation | Program | Certification | Recertification | Upcoming Workshops | Links | Certified Testers | Contact

Description: backflow picture

The Cross Connection Control/Backflow Prevention program is a state mandated program designed to protect the public's drinking water from contamination by identifying and eliminating cross connections.




Every public water system must initiate and maintain a viable cross connection control program. This is accomplished by surveying the distribution system for unprotected cross connections. Once identified, these connections can be eliminated through the proper use of backflow prevention assemblies. The public water system must maintain accurate records pertaining to the location of existing backflow prevention assemblies, type and size of each assembly and annual testing results (see Backflow Assembly Test Report Form). All testing must be done by a state certified backflow prevention tester. Additionally, backflow prevention assemblies used in South Carolina must be on SC DHEC's (List of Approved Backflow Prevention Assemblies for South Carolina).


The backflow prevention certification workshop is a three day course that instructs students in how backflow can occur and how cross connections can be addressed and/or eliminated. The cost of this training is $250.00 per person, limited to 30 people per class. During the course, State regulations are reviewed and testing procedures are demonstrated. Students participating in the workshop will get hands on experience in backflow prevention. A written exam and a wet lab exam must be passed in order to achieve certification, which is valid for three years.
The backflow prevention certification workshop is conducted in five cities: Charleston, Myrtle Beach, Columbia, Spartanburg and Seneca. There are no prerequisites or qualifications needed to attend this workshop.


A certified backflow prevention tester's license will expire every three years. In order to become re-certified, the tester will be required to take a 25 question written exam and test a double check valve assembly, pressure vacuum breaker, and a reduced pressure principle assembly in the wet lab. The tester's differential gauge must be accurate to within 2% of full gauge scale or +/- 0.3 psi differential.

The two ways to complete the requirements for recertification are listed below.

  1. One way to renew your backflow certification license is to request a study guide from Mr. John Watkins at 803-898-3567 or You can also print the study guide at this link (backflow recertification study guide).
  2. The second way to become re-certified is to go back through the three-day state-sponsored backflow prevention certification workshop described under "Certification" at the cost of $250.00 per person.

Upcoming Workshops

Location Date Class Contact

Spartanburg, SC
Holiday Inn Express

July 17-19, 2018 FULL (864) 699-7777

Seneca, SC
Gignilliat Wellness Center

August 21-23, 2018 FULL (803) 898-3567

Columbia, SC
Hilton Garden Inn

September 25-27, 2018 FULL (803) 407-6640

Columbia, SC
Hilton Garden Inn Harbison

October 23-25, 2018 FULL (803) 407-6640

Columbia, SC
Hilton Garden Inn Harbison

November 27-29, 2018 FULL (803) 407-6640

Charleston, SC
Radisson Hotel

None None (843) 744-2501

Myrtle Beach, SC
RiverWalk Inn & Suites

None None (843) 236-1000


John Watkins, Cross Connection Control Program Coordinator - (803) 898-3567

American Backflow Prevention Association

Listing of Certified Testers

General - The General Inspector provides the service of testing backflow prevention assemblies to the general public.

Limited - The Limited Tester does not provide testing services to the general public.

Inspector - The Inspector Tester is normally involved in the management of a backflow prevention program and does not sell his services to the general public.

Manufacturers - The Manufacturer's Agent has the same qualifications as the General Tester except the prescribed test is conducted as an extension of his duties as a representative of a particular backflow prevention company.