Sprinkler water storage containers shall be supervised to indicate when the water temperature drops to what level?

The requirement for supervising sprinkler water storage containers is focused on ensuring that the water temperature remains at a level that prevents freezing, which could compromise the effectiveness of the sprinkler system. A drop in water temperature below 40 degrees Fahrenheit is significant enough to warrant supervision because temperatures at or below this level pose a risk of freezing, especially in environments where cold weather is a factor.

By monitoring for temperatures that reach this threshold, facility managers can take preventive measures to bring the temperature back to a safe level, ensuring that the sprinkler system remains operational and can function effectively in the event of a fire. This level of oversight helps maintain the integrity of the fire protection system, meaning it is critical for overall safety and compliance with fire safety codes.