Identify the backflow protection
An irrigation connection can create a path between landscape water and the public water system.
South Carolina DES describes cross-connection control as a state-mandated program that protects public drinking water.
Ask the water provider which protection applies to the property. Record the assembly type, model, serial number, and location.
Follow the testing rule
South Carolina requires assembly testing after installation and annually. A water provider’s low-hazard residential irrigation policy may set another schedule. Confirm the schedule with the water provider.
The public water system keeps the assembly location, type, size, and annual result in its cross-connection control records.
Keep the latest result and note the next due date. Ask the water provider where the tester should submit the report.
Use a certified tester
South Carolina DES states that a state-certified tester must complete assembly testing.
Confirm the tester’s current certification before scheduling the visit. Give the tester clear access to the assembly and irrigation shutoff.
For a reduced pressure principle assembly, keep the relief port above water and away from toxic environments. Install it in a pit only when gravity drains the pit to ground surface.
Check the assembly before repair
South Carolina DES requires assemblies used in the state to appear on its approved backflow prevention assembly list.
Share the make, model, size, orientation, and installation photos with the provider. Ask whether a failed assembly needs repair or replacement.
South Carolina requires immediate testing after every assembly repair under regulation 61-58.7(F)(7)(c).
Prepare an irrigation backflow request
Share the property address, water provider, assembly details, last result, and due date.
Include photos, access notes, visible leaks, and recent irrigation work. Review the irrigation repair guide for other system problems.
Irrigation repair questions
- Why does an irrigation system need backflow protection?
- Backflow protection controls a cross-connection that could allow water to flow toward the public water system.
- Source: South Carolina DES backflow program
- When must a backflow prevention assembly be tested?
- South Carolina requires testing after installation and annually, except when a water provider's low-hazard residential irrigation policy sets another schedule. Confirm the schedule with the water provider.
- Source: South Carolina drinking water regulation
- Who can test a backflow prevention assembly?
- South Carolina DES says a state-certified backflow prevention tester must complete the test.
- Source: South Carolina DES backflow program
- Can I choose any backflow prevention assembly?
- No. South Carolina DES requires assemblies used in the state to appear on its approved list.
- Source: South Carolina DES backflow program