What is typically required during testing of a fire sprinkler system?

During the testing of a fire sprinkler system, multiple modalities ensure that the system is functioning correctly and can effectively respond in the event of a fire. Each aspect of testing plays a crucial role in evaluating the overall integrity and performance of the system.

Visual inspection is essential for identifying any visible defects or concerns, such as corrosion, physical damage, or improper installation of components. This initial assessment helps ensure that all parts of the system are intact and conform to safety regulations.

System activation is necessary to evaluate the performance of the sprinkler heads and other system features under simulated fire conditions. This involves activating the system to confirm that it responds appropriately and that water is distributed adequately across all areas that the system is designed to protect.

Flow testing is critical for assessing the water supply's ability to meet the requirements outlined in the system design. This testing measures the flow rate and pressure to ensure that the system can supply the required amount of water to the sprinkler heads in the event of activation, which is essential for fire suppression.

The inclusion of all these factors is fundamental in ensuring that the fire sprinkler system is fully operational and compliant with the necessary codes and standards, making "All of the above" the appropriate choice for what is required during testing.