What is the minimum pressure tank temperature that should be maintained?

Maintaining a minimum pressure tank temperature of 40 degrees Fahrenheit is crucial for ensuring the proper functioning of sprinkler systems, particularly in cold weather. Below this temperature, water within the tank can freeze, leading to potential damage to both the tank and the connected piping. Freezing can cause the expansion of water, resulting in ruptures, obstructions, and ultimately system failure. This temperature threshold acts as a safeguard to prevent freezing conditions, ensuring that the sprinkler system remains operational and effective when needed, especially in emergencies.

By setting the minimum temperature at 40 degrees Fahrenheit, it also allows a margin that accommodates for slight fluctuations in temperature without immediately jeopardizing the integrity of the system. It is essential for those involved in installing and maintaining sprinkler systems to be aware of this temperature requirement to promote safety and functionality throughout the operational lifecycle of the fire protection system.