What is the primary purpose of conducting a main drain test in a sprinkler system?

The primary purpose of conducting a main drain test in a sprinkler system is to measure water flow and pressure. This test is crucial for ensuring that the sprinkler system is functioning correctly and can deliver the necessary water flow during an activation event. By measuring the flow and pressure from the main drain, inspectors can verify that the system has sufficient water supply and can effectively control or extinguish a fire.

Accurate flow measurement helps in assessing if the system meets the requirements set out in design criteria and local codes. It serves as a performance indicator that not only checks the overall operational readiness of the system but also ensures that water supply issues, such as low pressure, do not exist. This information is vital for understanding the hydraulic performance of the sprinkler system during fire emergencies, thereby ensuring optimal design and operational efficiency in protecting life and property.