The minimum allowable operating pressure applied to a standard sprinkler is __________

The minimum allowable operating pressure applied to a standard sprinkler is __________

• A. 5 psi
• B. 7 psi
• C. 10 psi
• D. 15 psi

Answer: (B)

The main idea is that a sprinkler head must have enough pressure to reliably actuate and discharge water. For a standard sprinkler, the minimum operating pressure is seven psi. This threshold ensures the head’s mechanism releases and delivers the required flow despite friction losses in the piping. Pressures lower than seven psi, like five psi, may not reliably activate or provide adequate discharge. Higher pressures, such as ten or fifteen psi, are acceptable but not necessary for the minimum requirement—they simply provide more headroom. So, seven psi is the baseline that guarantees reliable operation for a standard sprinkler.

The main idea is that a sprinkler head must have enough pressure to reliably actuate and discharge water. For a standard sprinkler, the minimum operating pressure is seven psi. This threshold ensures the head’s mechanism releases and delivers the required flow despite friction losses in the piping. Pressures lower than seven psi, like five psi, may not reliably activate or provide adequate discharge. Higher pressures, such as ten or fifteen psi, are acceptable but not necessary for the minimum requirement—they simply provide more headroom. So, seven psi is the baseline that guarantees reliable operation for a standard sprinkler.