What is the minimum operating pressure for a sprinkler head?

The minimum operating pressure for a sprinkler head is 7 psi. This pressure is considered essential for the effective operation of most sprinkler systems, ensuring that they can provide adequate coverage and water distribution in the event of a fire. At this pressure, the sprinkler head is able to properly atomize water into a fine mist, which is crucial for maximizing the cooling effect and suppressing flames effectively.

Sprinkler heads are designed to operate efficiently at this minimum pressure to prevent scenarios where insufficient water delivery could hinder overall system performance. Establishing a baseline operating pressure ensures that fire protection measures are reliable and effective during emergency situations.

In contrast, other values such as 5 psi, 10 psi, and 15 psi are either too low or too high for the standard minimum operating requirement. A lower pressure may not provide adequate water flow or coverage, while a higher pressure could potentially lead to system damage or undesirable spray patterns due to excessive force.