What does a reading of 0.0 indicate when testing the air inlet of a pressure vacuum breaker with the high side bleed valve opened?

What does a reading of 0.0 indicate when testing the air inlet of a pressure vacuum breaker with the high side bleed valve opened?

• A. The air inlet is functioning correctly
• B. The air inlet is stuck open
• C. The air inlet is stuck closed
• D. The assembly has a leak

Answer: (C)

A reading of 0.0 when testing the air inlet of a pressure vacuum breaker with the high side bleed valve opened indicates that the air inlet is stuck closed. In a properly functioning air inlet, there should be a positive reading which would suggest that air is able to enter the system as necessary to maintain a vacuum condition. When the air inlet is stuck closed, it fails to allow air into the system, which results in a reading of 0.0, signifying that no air is being admitted. Understanding this is vital, as the air inlet's primary role is to prevent siphoning and facilitate the proper operation of the pressure vacuum breaker. If the air inlet were functioning correctly, you would expect to see a measurable reading indicating air flow through that inlet, which is not the case with a 0.0 reading. Hence, this reinforces the conclusion that the air inlet is indeed obstructed or stuck closed, which can impact the effectiveness of the backflow prevention mechanism of the assembly.

A reading of 0.0 when testing the air inlet of a pressure vacuum breaker with the high side bleed valve opened indicates that the air inlet is stuck closed. In a properly functioning air inlet, there should be a positive reading which would suggest that air is able to enter the system as necessary to maintain a vacuum condition. When the air inlet is stuck closed, it fails to allow air into the system, which results in a reading of 0.0, signifying that no air is being admitted.

Understanding this is vital, as the air inlet's primary role is to prevent siphoning and facilitate the proper operation of the pressure vacuum breaker. If the air inlet were functioning correctly, you would expect to see a measurable reading indicating air flow through that inlet, which is not the case with a 0.0 reading. Hence, this reinforces the conclusion that the air inlet is indeed obstructed or stuck closed, which can impact the effectiveness of the backflow prevention mechanism of the assembly.