A cross-connection is a direct arrangement of a piping line that allows the potable water supply to be connected to a line that contains a contaminant. Under abnormal conditions, backflow into the public water supply may occur.
What is backflow prevention, and why is it important?
Because of the potential for water in a private plumbing system to flow back into the public water system in some conditions, we require some locations and equipment/facilities, such as irrigation systems and swimming pools, private wells to have "backflow prevention" devices.
Backflows may occur when there is a decrease in pressure in one part of the public water system due to a water main leak during firefighting operations drawing water from hydrant(s).
What are some possible Cross-Connections?
The most common cross-connection in our area are private wells, lawn irrigation systems, and the ordinary garden hose.
What protection is required for Private wells?
All residences who choose to utilize both, public water supply and an auxiliary well will be required to install an approved Reduced pressure principle assembly as shown below.
What protection is required for Lawn irrigation systems?
All residences that utilize lawn irrigation systems must protect the public water supply by installing an approved Reduced pressure principle assembly as shown above.
Who can install a Reduced pressure principle assembly?
Some household plumbers and most lawn irrigation companies are certified to install a reduced pressure principle.