At what pressure are pressure tanks typically maintained in a sprinkler system?

In a sprinkler system, pressure tanks are typically maintained at around 75 psig (pounds per square inch gauge). This pressure level is significant because it ensures that the water is delivered at an adequate pressure to effectively operate the sprinkler system when needed. The 75 psig pressure is usually sufficient for providing the necessary flow rates and pressures for effective fire suppression in most applications, which is critical for ensuring the system can respond effectively in an emergency.

Maintaining the pressure too low could lead to insufficient water delivery during activation, while pressures much higher than 75 psig could cause excessive stress on the system components and potentially lead to leaks or failures. Therefore, 75 psig represents a balanced approach that optimizes both operational effectiveness and system reliability.