What is the maximum operating pressure for 1¾- and 2½-inch hoses during testing?

• A. 250 psi
• B. 300 psi
• C. 200 psi
• D. 150 psi

Answer: (A)

During hydrostatic testing of attack hoses, you apply water pressure to verify the hose and fittings can handle stress beyond normal use. For 1¾-inch and 2½-inch hoses, the standard test pressure is 250 psi. This level provides a solid safety margin to reveal leaks or weak spots without over-stressing the hose components. The other options are not used for these sizes in standard testing: 300 psi would exceed the typical test guidance for these hoses, while 200 psi or 150 psi are below the required test pressure. So, 250 psi best reflects the correct testing pressure.