What is the minimum airflow required from an air compressor to necessitate having an air maintenance device?

The minimum airflow required from an air compressor to necessitate having an air maintenance device is established as 5.5 cubic feet per minute. This specification is critical to ensure that the air pressure within the water-based fire protection system is adequately maintained.

When systems, such as dry pipe or pre-action sprinkler systems, are dependent on air pressure to keep valves in the closed position, it is essential that the system is able to replenish any air that may escape due to leaks or normal operation. An air maintenance device automatically maintains the required air pressure by providing the necessary airflow from the compressor at this threshold level.

When airflow is below this benchmark, the system may not function properly, potentially leading to problems such as premature activation of sprinkler heads or failure to deliver water when needed. Understanding the correct airflow requirements is foundational for the effective installation and maintenance of these systems, aligning with NFPA standards that guide the proper functioning of fire protection systems.