What is the test pressure for 1¾ and 2½ inch hoses?

• A. 300 psi for 5 minutes; maximum operating pressure 250 psi
• B. 200 psi for 5 minutes; maximum operating pressure 150 psi
• C. 250 psi for 10 minutes; maximum operating pressure 300 psi
• D. 350 psi for 3 minutes; maximum operating pressure 250 psi

Answer: (A)

The main idea is that hoses are tested at a higher pressure than they are rated to operate, to verify their strength and detect defects. For 1¾ inch and 2½ inch attack hoses, the standard hydrostatic test is 300 psi held for 5 minutes, while the maximum operating (service) pressure of these hoses is 250 psi. This margin ensures the hose can safely handle pressures well above normal use without leaking or bursting.

So, the correct approach uses a 300 psi test pressure for 5 minutes, with a maximum operating pressure of 250 psi. The other options don’t fit because they either use too low or too high a test pressure, or a duration that doesn’t align with these hose sizes’ standard testing guidelines.