Why is it important to verify valve positions during pre-run checks?

• A. Line checks verify that hose lays are correct, connections secure, and flows expected.
• B. Increases engine RPM.
• C. Reduces water flow.
• D. Changes nozzle type.

Answer: (A)

Verifying valve positions during pre-run checks ensures the water path is actually open to the hoses and outlets, so the line checks reflect real readiness. When valves are set correctly, water can flow where intended, the discharge and intake paths align with the test plan, and the expected pressure and flow are achievable. If a valve is accidentally left closed or partially closed, you can finish laying hoses and securing connections only to encounter little or no flow at the nozzle, which can lead to misinterpreting the test results. That’s why checking valve positions is essential—it confirms you can perform line checks reliably and that the system is ready to deliver water where it’s needed. Other factors like engine RPM or nozzle type aren’t resolved by valve verification, since they’re addressed separately from ensuring the correct water path is open.