|
When you turn on the tap to get a refreshing drink, water flows because the pressure in the distribution system pushes the water out of the pipes and into your glass. Unfortunately, a sudden change in water pressure sometimes can cause the water to flow backwards. This unexpected reversal of flow can allow contamination to flow back into your water supply, which is why it is called backflow. When the water flow is reversed, even for a short period of time, the results can potentially be extremely serious, as non-potable water can infiltrate the drinking water supply. Public health risks may include waterborne diseases from such contaminants as E.coli, Salmonella, and Giardia, and exposure to toxic chemicals like pesticides, metals, and volatile organic compounds. This can potentially occur in both residential and industrial environments.
|
|
The State of Oregon and most water providers require a properly installed backflow prevention device or assembly where each of the following system connects to the drinking water supply:
|
