What is the maximum flowing pressure for standard spray on upright, pendent, and sidewall sprinklers?

The maximum flowing pressure for standard spray on upright, pendent, and sidewall sprinklers is 175 psi. This limit is established to ensure optimal performance and safety in fire protection systems. Exceeding this pressure can lead to sprinkler damage or failure, reducing their effectiveness during an emergency.

Standard spray sprinklers are specifically designed to operate within this pressure range to maintain reliable water distribution and prevent premature activation or water misting that could arise from higher pressures. Essentially, adhering to the 175 psi maximum helps ensure that the sprinkler system functions correctly, delivering the appropriate amount of water to extinguish or control a fire effectively.