A cross-connection is an actual or potential connection between the safe drinking water (potable) supply and a source of contamination or pollution. Cross-connections can result in a hazardous event known as backflow, which can draw those contaminants into your drinking water supply.
North Carolina Administrative Code Title 15A, Subchapter 18C, Section 0406, Subsection B states that “no person shall construct, maintain, or operate a physical arrangement whereby a public water system has a cross-connection without the use of proper backflow protection.

Hydrocorp sends notifications informing water customers of plumbing code requirements that backflow preventers must be tested annually. Facility Assessments/ Inspections for Cross-Connection Hazards are required as specified within the local CCC plan. Instructions and due dates are included in notifications.

Hydrocorp hired by local water purveyor to assist with mandatory Cross-Connection Control Program (CCC).

Water Customer selects and hires an ASSE approved Backflow Preventer Tester and/or Cross-Connection Inspector. Test and Inspection data are submitted online to the local water purveyor/utility.

If cross-connections are identified during the inspection, the water customer is provided written instructions for modifications and a mandatory compliance date.

Annual Backflow preventer test and inspection records confirmed and maintained by the local water purveyor as required by law

Hydrocorp hired by local water purveyor to assist with mandatory Cross-Connection Control Program (CCC).

Hydrocorp sends notifications informing water customers of plumbing code requirements that backflow preventers must be tested annually. Facility Assessments/ Inspections for Cross-Connection Hazards are required as specified within the local CCC plan. Instructions and due dates are included in notifications.

Water Customer selects and hires an ASSE approved Backflow Preventer Tester and/or Cross-Connection Inspector. Test and Inspection data are submitted online to the local water purveyor/utility.

If corrective action is identified during the facility Cross-Connection Inspection, the water customer is provided written instructions and a mandatory compliance date.

Annual Backflow preventer test and inspection records confirmed and maintained by the local water purveyor as required by law
A cross-connection is an actual or potential connection between the safe drinking water (potable) supply and a source of contamination or pollution. State plumbing codes require approved backflow prevention methods to be installed at every point of potable water connection and use. Cross-Connections must be properly protected or eliminated.

A public water supplier may determine that specific residential water service connections shall be inspected (with appropriate notification in advance) for
potential cross-connection hazards. Causes for residential exterior inspections are lawn irrigation systems.
A typical residential exterior cross-connection inspection takes 5-15 minutes.
No.
Building owners are responsible for costs associated with corrective action/non-compliance.
If a residential service connection owner is notified of a mandatory inspection, compliance is required. These inspections are conducted in order to ensure compliance with state regulations to maintain the safety of your drinking water.
Penalties for refusing to cooperate with inspections and/or refusing to make needed repairs are determined by your local water utility. These typically can include termination of water service, a fine, or both.
Just like any other mechanical device, backflow prevention assemblies are prone to wear and tear, and do break down from time to time. Regular testing is required in order to ensure that your device remains in proper working order.
Testing frequency varies by system and local ordinance. In order to protect the quality of the drinking water at your home, it is suggested that all backflow prevention assemblies are tested annually. You will be required to have your assembly tested in accordance with your water utility’s approved cross-connection control plan. You will be notified when your assembly is due for testing.
Always refer to your testing notice or call HydroCorp at 844-493-7641 for specific requirements.
Residential Cross-Connection Control Survey | Exterior from HydroCorp on Vimeo.
Example: Hose connection vacuum breakers |
Example: Integrated vacuum breaker on outside hose spigot. |
![]() Example: Hose end in bucket | ![]() Example: Hose end in pool |
![]() |
Vacuum breaker should not be subject to continuous pressure like the example here illustrates. (This type of irrigation set up/system would need to be corrected.) |
These require periodic performance testing by a Certified Tester.
![]() Pressure Vacuum Breaker Assembly | ![]() Reduced Pressure Principle Backflow Prevention Assembly |
A cross-connection is an actual or potential connection between the safe drinking water (potable) supply and a source of contamination or pollution. State plumbing codes require approved backflow prevention methods to be installed at every point of potable water connection and use. Cross-Connections must be properly protected or eliminated.

The North Carolina Administrative Code Section 15A NCAC 18C .0406 B states that “no person shall construct, maintain, or operate a physical arrangement whereby a public water system has a cross-connection without the use of proper backflow protection.” To ensure adherence to this code and to mitigate risk to the quality of the potable water system, the City of Weaverville is implementing a Cross-Connection Control Program, which includes onsite inspections for potentially hazardous interconnections.
Hose Connection Vacuum Breaker Video
Residential Cross-Connection Control Survey | Exterior from HydroCorp on Vimeo.
If your building has an exterior Testable Type Backflow Preventer Assembly (ASSE 1013 or ASSE 1015 type) in supply to the interior plumbing, your inspection may take less than 15 minutes. Prior to their arrival, be sure to inform the inspector if you have an exterior or interior backflow preventer assembly. Buildings with no existing backflow preventer at the water service connection point may require a more extensive inspection.
If your building has an exterior existing backflow preventer assembly, being present may not be necessary. Consult with the inspector/tester you hire prior to their visit for final determination.
If you are the owner of the facility being inspected, you are responsible for any needed repairs. Renters may have to refer to their lease agreements in order to determine whether they are responsible for repairs.
Yes. These inspections are conducted in order to ensure compliance with state regulations to maintain the safety of your drinking water.
Penalties for refusing to cooperate with inspections and/or refusing to make needed repairs are determined by your local water utility. These typically can include termination of water service, a fine, or both.
Just like any other mechanical device, backflow prevention assemblies are prone to wear and tear, and do break down from time to time. Regular testing is required in order to ensure that your device remains in proper working order.
Testing frequency varies by system and local ordinance. In order to protect the quality of the drinking water at your home, it is suggested that all backflow prevention assemblies are tested annually. You will be required to have your assembly tested in accordance with your water utility’s approved cross-connection control plan. You will be notified when your assembly is due for testing.
Always refer to your testing notice or call HydroCorp at 844-493-7641 for specific requirements.
![]() Example: Hose connection vacuum breakers | ![]() Example: Integrated vacuum breaker on outside hose spigot. |
![]() Example: Hose end in bucket | ![]() Example: Hose end in pool |
![]() |
Vacuum breaker should not be subject to continuous pressure like the example here illustrates. (This type of irrigation set up/system would need to be corrected.) |
These require periodic performance testing by a Certified Tester.
![]() Pressure Vacuum Breaker Assembly | ![]() Reduced Pressure Principle Backflow Prevention Assembly |