New Installations and Replacements

Both new and existing customers of the city's water supply are evaluated by CCC staff to determine which hazards, if any, exist and the type of backflow preventers required. If a backflow preventer assembly is required at a facility, a licensed plumbing contractor must complete, sign, and return the Backflow Preventer Permit Application (PDF). There is a $100 Cross-Connection Control Permit Fee for any new or replacement installation of a backflow preventer.

City of Durham Backflow Preventer Permit applications can be completed online using the Land Development Office (LDO). This system will allow you to check on current status of applications and permits. As part of the LDO process, Cross Connection Control (CCC) sign-off is now required for issuance of Certificate of Occupancy.

NOTICE: Plan Review for Building Permit Application


Effective 11/1/2017, CCC will implement a $150.00 fee to perform plan review and re-review(s) associated with received building permit applications to the City/County Inspections Department. Application fees are due once the building permit has been submitted to the City/County Inspections Department for review. In order to request CCC perform a plan review, a CCC Plan Review Request Form must be completed. For additional information, please see the “hyperlink to the approved Plan Review Fee Collection – Letter to Industry.

NOTICE: Work Started Without Permit Fee


No person may commence or proceed with the installation of backflow preventer assemblies without first obtaining a Backflow Permit.  Due to the high volume of work started without permit, in order to offset the cost, the city will implement a double backflow permit fee on each backflow assembly that was installed prior to being issued a backflow permit. Effective January 1, 2017, a $200.00 backflow permit fee will be charged for a backflows installed prior to a permit being issued, required by the Department of Water Management Cross Connection Control (Part 15-116). For additional information, please see the Work Started Without Permit (PDF).

Specs and Details

1. Outside Installations:
a. 0.75 inches to 2 inches - IRRIGATION - Outside
b. 2.5 inches to 12 inches - DOMESTIC - Outside
c. 2.5 inches to 12 inches - FIRE - Outside
d. 2.5 inches to 12 inches - FIRE W FDC - Outside
e. Suggested Temporary Flushing - Testing

2. Inside Installations:
a. 0.75 inches to 2 inches - DOMESTIC - Inside
b. 2.5 inches to 12 inches - DOMESTIC - Inside
c. 2.5 inches to 12 inches - FIRE - Inside

For a complete list of pre-approved products, and water and sewer specs and details, please visit https://durhamnc.gov/1058.