What is the initial step to take when installing a backflow prevention device?

The initial step of ensuring compliance with local codes is crucial for the installation of a backflow prevention device because it ensures that the installation meets safety and regulatory standards specific to the area. Local codes are established to protect the public water supply from contamination and often dictate the types of backflow devices that can be used, their installation requirements, and maintenance protocols. By confirming compliance upfront, you prevent future legal issues or the need for costly rework, ensuring the protection of the water system from potential backflow hazards.

Testing the existing water pressure and identifying the location of installation are important steps but follow after establishing that the installation adheres to all relevant regulations. Similarly, purchasing the necessary tools is a preparatory action that should come after understanding the compliance requirements to ensure the right equipment and methods are used for that specific installation scenario.