How often should the water supply for a sprinkler system be tested?

The water supply for a sprinkler system should be tested every 5 years to ensure it is functioning effectively and can adequately support the sprinkler system when needed. This testing interval is established to detect any changes in the water supply conditions, such as changes in pressure or flow rate, that could affect the performance of the sprinkler system in an emergency situation. Regular testing helps to maintain compliance with industry standards and ensures that the system is ready to operate when activated. While annual checks and maintenance may be performed, the comprehensive testing of the water supply itself is typically mandated every 5 years to ensure reliability and effectiveness in fire suppression.