What is the minimum working pressure for above-ground sprinkler system components?

What is the minimum working pressure for above-ground sprinkler system components?

• A. 175 psi
• B. 150 psi
• C. 200 psi
• D. 125 psi

Answer: (A)

In sprinkler system design, every component must be able to handle a minimum working pressure. For above-ground sprinkler components, that minimum is 175 psi. This rating provides enough margin for the pressures that can occur in normal operation, including pump start-up and friction losses along runs, so the components won’t be overstressed. Pressures like 125 psi would be too low for reliable operation, and 150 psi could fall short in many installations. While some parts may be rated higher (such as 200 psi), 175 psi is the required minimum, making it the best answer.

In sprinkler system design, every component must be able to handle a minimum working pressure. For above-ground sprinkler components, that minimum is 175 psi. This rating provides enough margin for the pressures that can occur in normal operation, including pump start-up and friction losses along runs, so the components won’t be overstressed. Pressures like 125 psi would be too low for reliable operation, and 150 psi could fall short in many installations. While some parts may be rated higher (such as 200 psi), 175 psi is the required minimum, making it the best answer.