What is the nozzle pressure for a master stream solid tip?

• A. 75 psi
• B. 50 psi
• C. 30 psi
• D. 80 psi

Answer: (D)

When a master stream uses a solid tip, the nozzle pressure is the energy that drives a large-volume stream over distance. You need enough pressure to overcome friction losses in the long hose lay and through the fixed, larger-orifice bore of the solid tip, while still maintaining a stable, high-GPM flow. Eighty psi at the nozzle is the standard value chosen because it provides the right balance of velocity and reach for these large streams, ensuring the stream remains cohesive and effective for cooling and knockdown. Lower pressures like thirty or fifty psi don’t supply enough energy for the large-volume flow, resulting in a weaker, shorter-reaching stream. About seventy-five psi is close, but the established practice for master stream solid tips is 80 psi to keep performance consistent across equipment and scenarios.