How many test cocks are required on a 2 inch and smaller pressure vacuum breaker?

A 2-inch and smaller pressure vacuum breaker requires two test cocks for proper testing and certification. The purpose of these test cocks is to allow for the hydraulic testing of the backflow prevention device, ensuring that it is functioning correctly to prevent backflow in water systems. Each test cock provides access to different sections of the device, allowing inspectors to evaluate performance factors such as air intake and water pressure.

Having two test cocks is critical because one is typically used to check the low test pressure, while the other can be used for the high test pressure, making it essential for accurate assessment and compliance with regulatory standards. This dual setup facilitates comprehensive testing, enabling thorough verification of the device’s operational integrity.