What is the recommended maximum length of time that can pass before performing a flow test on a sprinkler system's water supply?

The recommended maximum length of time before performing a flow test on a sprinkler system's water supply is three years. Regular flow testing is essential to ensure that the sprinkler system is functioning as intended and that the water supply is sufficient to adequately protect the building in the event of a fire.

After a period of three years, factors such as sediment build-up, changes in water pressure, or adjustments to the water supply infrastructure can significantly impact the performance of the sprinkler system. Conducting a flow test every three years allows for the identification of any issues that may have arisen, thereby ensuring the reliability of the system when it is needed most. This frequency reflects industry standards and best practices to maintain optimal safety and compliance with fire protection regulations.