What is the maximum hose pressure for 3 inch non-high-pressure hoses?

• A. 360 psi
• B. 450 psi
• C. 540 psi
• D. 200 psi

Answer: (A)

Maximum hose pressure is the highest internal pressure a hose of a given type is designed to safely withstand in service. For a 3 inch non-high-pressure attack hose, that rating is 360 psi. This limit comes from the hose’s construction—wall thickness, jacket, and lining—which are chosen to balance strength with weight and flexibility. Staying at or below this pressure protects the hose from rupturing during operation. Higher-pressure hoses exist for specialized uses, but they’re built differently and aren’t rated for this standard 3 inch non-high-pressure hose. The other numbers either exceed the hose’s rated capability or are well below its safe limit, so 360 psi is the appropriate maximum for this hose type. In practice, the actual pressure at the nozzle is shaped by the pump setting and friction losses along the hose, so you don’t run the full system pressure through the entire length.