Cross Connection and Backflow Prevention Devices

In Oregon most cities require that a backflow prevention device be installed for residential and commercial customers who are connected to a public water system.


Backflow devices prevent potential cross connections where water might flow in the reverse direction from a residence or business back into the public drinking water supply. This protects the drinking water from potential contamination from chemicals and any contaminated water that could flow back into the system.


A backflow device should be installed anywhere that a cross connection could provide a pathway for potentially contaminated fluids to flow into the drinking water supply. A backflow prevention device stops this contamination from happening by stopping the water from flowing the wrong way in the pipes. The Federal Safe Drinking Water Act and the State of Oregon have passed rules and regulations that deal with cross connections and backflow prevention devices.


Some examples of commercial or residential sources of cross-connection contamination are residential sprinkler systems, farm irrigation systems, fire sprinkler systems, pop machine fountain units, heater boiler units, a car wash, multi-unit dwellings.


Installing a backflow device helps prevent contaminants from entering your home or office water system, assuring that everyone’s drinking water will be safe. Backflow devices are owned by the homeowner or business owner and it is the sole responsibility of the homeowner or business owner to ensure that the assembly is in satisfactory operating conditions at all times. In most cases, the water system which you are connected to will require that you test and certify your backflow device is working. You should have a backflow prevention device installed in your home or business, even if it is not required. Check with your local city for the regulations in your area.