If a discharge valve fails to open, which sequence best describes the recommended action?

• A. Keep pumping and check the valve later.
• B. Force the valve open with tools.
• C. Stop, investigate the cause (sticking valve, mechanical failure), and use alternative lines or reschedule operations with proper authority.
• D. Close all valves and retreat.

Answer: (C)

When a discharge valve won’t open, the priority is safety and preserving the system’s integrity. Stopping the pump and inspecting the valve lets you assess the fault without risking water hammer, pump damage, or injury from forcing a jammed valve. The best sequence is to stop pumping, investigate the cause (such as a sticking valve or mechanical failure), and, if possible, switch to alternative discharge lines or reschedule the operation with the proper authority. This keeps water flowing where needed while you diagnose and address the issue in a controlled, authorized way. Forcing the valve open with tools risks injury and equipment damage, while continuing to pump and checking later won’t promptly resolve the immediate hazard. Closing all valves and retreating cuts off water to the system and isn’t appropriate without a clear, authorized plan.