When testing a hoseline, to what pressure should the line be filled?

• A. 50 psi (350 kPa) or hydrant pressure
• B. 100 psi (690 kPa)
• C. 25 psi (172 kPa)
• D. 150 psi (1035 kPa)

Answer: (A)

When testing a hoseline, you want to confirm the hose and fittings hold up under pressure without over-stressing them. Filling the line with water to a modest pressure—about 50 psi—or to the hydrant pressure if you’re using a hydrant as the source lets you check for leaks and weak spots under realistic operating conditions. Pressures higher than this can unnecessarily stress the hose and may mask problems, while too low a pressure might not reveal leaks. So the recommended approach is to fill to 50 psi or hydrant pressure to safely and effectively verify integrity.