Minimum PSI for all pumps unless otherwise specified?

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

Answer: (B)

The main idea here is that there is a standard baseline for pump discharge pressure used when no other specification is given. Setting a default minimum helps ensure the pump has enough head to overcome typical system losses and to keep the pump properly primed and delivering consistent flow. A value around 1,000 PSI provides ample margin to account for friction losses in hoses and fittings, elevation changes, and various downstream demands, while still allowing adjustments if a specific job requires more or less pressure. Lower values could fail to meet flow requirements or stress the pump with cavitation or insufficient lubrication, whereas a higher number isn’t a universal minimum and isn’t used as the baseline unless a situation calls for it. So, 1,000 PSI is the best general default unless the system specs specify a different requirement.