Minimum PSI for pumps unless indicated otherwise?

• A. 750 PSI
• B. 500 PSI
• C. 2,000 PSI
• D. 1,000 PSI

Answer: (D)

In pump operation, a baseline minimum pressure is used to ensure reliable flow and protect the system. Unless the manual or setup specifies otherwise, 1000 psi is the standard minimum because it provides enough pressure to overcome typical line losses and friction, keeps the pump primed, and helps prevent issues like cavitation or insufficient flow. Lower values would risk inadequate performance in many configurations, while a setting like 2000 psi would generally be reserved for special high-pressure needs, not a default.