When pumping 10 ft above the pump, what adjustment is added?

When pumping 10 ft above the pump, what adjustment is added?

• A. Add 5 psi per floor
• B. Subtract 5 psi per floor
• C. Add 10 psi per floor
• D. Add 2.5 psi per floor

Answer: (A)

The pressure you need at the nozzle must overcome gravity when the discharge point sits above the pump. In practice, you add 5 psi for each floor the discharge point is above the pump. Since 10 ft is roughly one floor, you add 5 psi. This keeps the nozzle pressure accurate despite the elevation. The other options don’t match the standard elevation head rule (they’d apply different per-floor amounts or the opposite sign).

The pressure you need at the nozzle must overcome gravity when the discharge point sits above the pump. In practice, you add 5 psi for each floor the discharge point is above the pump. Since 10 ft is roughly one floor, you add 5 psi. This keeps the nozzle pressure accurate despite the elevation. The other options don’t match the standard elevation head rule (they’d apply different per-floor amounts or the opposite sign).