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Backflow Prevention

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The Oro Valley Water Utility is responsible for supplying safe drinking water to our customers. In the exercise of this responsibility, the Utility must implement, administer, and maintain a backflow prevention program to protect our public water system from hazards originating on the premises of our customers that may impair or alter the water in the public water system. The return of any water to the public water system after the water has been used for any purpose on the customer’s premises is unacceptable and opposed by the Utility.

The Water distribution system is designed to keep the water flowing from the distribution system to the customer. However, when hydraulic conditions within the system deviate from the “normal” conditions, water flow can be reversed. When this backflow happens, contaminated water can enter the distribution system.

The Utility implemented the Backflow Prevention Program in 1996 in response to new requirements in the Arizona State Drinking Water Regulations. The program works to keep the water supply safe from contaminants that could be introduced into the water system through backflow, backsiphonage, or backpressure from a customer’s plumbing system. The program does this by requiring the installation, testing, and maintenance of approved backflow prevention assemblies on the water service as per the Town’s plumbing codes and ordinances. Water customers with service protection backflow assemblies are notified by mail that the yearly inspection of their assembly is due.

The Utility requires that the contractor doing any work on a Backflow Prevention Assembly be licensed. This includes, but is not limited to testing, repairing, installing, retrofits, and replacements of Backflow Prevention Assemblies.

Installation Standard Details. A plumbing permit is required for installation, retrofit, or replacement of a Backflow Prevention Assembly.

Backflow Test FormBackflow Prevention Assembly Test Form
The Oro Valley Water Utility appreciates your dedication and contributions to the Backflow Prevention industry. Because of your continuing efforts, public drinking water supplies are safe from contamination resulting from backflow.

Backflow Prevention Program Ordinance - Backflow Prevention Ordinance
The Utility implemented the Backflow Prevention Program in 1996 in response to new requirements in the Arizona State Drinking Water Regulations. The program works to keep the water supply safe from contaminants that could be introduced into the water system through backflow, backsiphonage, or backpressure from a customer's plumbing system. The program does this by requiring the installation, testing, and maintenance of approved backflow prevention assemblies on the water service as per the Town's plumbing codes and ordinances. Water customers with service protection backflow assemblies are notified by mail that the yearly inspection of their assembly is due.

The Utility requires that the contractor doing any work on a Backflow Prevention Assembly be licensed. This includes, but is not limited to testing, repairing, installing, retrofits and replacements of Backflow Prevention Assemblies.

A plumbing permit is required for installation, retrofit, or replacement of a Backflow Prevention Assembly.