Consumer's Page - Cross Connection and Backflow
Did you receive a notice from the Backflow Compliance Office? Whether you received a letter or found a door hanger at the property, our correspondence guide may be helpful.
Requirements for properties with backflow prevention assemblies:
If your property has one or more backflow prevention assemblies, you must hire a certified tester approved by the City of Columbus to perform annual tests and complete any repairs that might be needed. Additional Information and Notes.
Annual Test Status
Visit the Backflow Compliance Office Customer Portal to check the submittal status of your Backflow Prevention Assembly Test Report.
Find a Certified, Approved Backflow Device Tester:
Irrigation System Backflow Testers – for Device Owners (Updated 11/29/21)
List of certified contractors approved for testing backflow prevention devices on irrigation systems.
Backflow Testers, All Systems – for Device Owners (Updated 11/29/21)
List of certified contractors approved for testing backflow prevention devices on all plumbing systems.
These lists are typically updated bi-weekly.
Special Requirements for Non-residential Properties:
Non-residential customers are required to install a backflow preventer at the end of their water service line(s). Booster pumps, which could create backflow in adjacent properties, must be equipped with a method of preventing low pressure on the suction line to the pump. See Guidance for Non-residential Properties for specific requirements, types of devices, standard detail drawings and exceptions.
Meter Outdoor Water Use, Reduce Sewer Charges
Those using large amounts of water not entering the sewer system (outdoor watering, irrigation systems) could save by installing an auxiliary meter system. The system must be purchased, installed and maintain privately - learn more