Most constant flow hand nozzles are designed to operate at a nozzle pressure of?

• A. 560 kPa
• B. 700 kPa
• C. 1000 kPa
• D. 350 kPa

Answer: (B)

Constant-flow hand nozzles are designed to deliver a preset flow by keeping the outlet pressure at a fixed level. That fixed level is about 700 kPa, which is roughly 100 psi. This standard nozzle pressure gives predictable performance across common hose and pump conditions, so operators know what flow to expect when the nozzle is set for a given rate. If you operate at significantly lower or higher nozzle pressure, the nozzle won’t maintain its designed flow as reliably, and the stream characteristics can change. The other pressure values are outside the typical outlet pressure specification for these nozzles, which is why they don’t provide the same stable, designed performance.