What is the flow range for 1.5 inch attack hose?

What is the flow range for 1.5 inch attack hose?

• A. 20 - 80 gpm
• B. 40 - 125 gpm
• C. 60 - 180 gpm
• D. 80 - 200 gpm

Answer: (B)

The main idea is that flow for a handline is limited by the hose diameter because friction loss climbs as you push more water through a small hose. A 1.5 inch attack hose is designed to deliver a practical range of flows that balance acceptable nozzle pressure with manageable friction loss. That makes about 40 to 125 gallons per minute the typical operating range. At the low end, you can still flow around 40 gpm with a suitable nozzle setting; at the high end, you approach roughly 125 gpm before the friction loss and required nozzle pressure become impractical for a handline. Flows significantly above this range would usually require a larger-diameter hose or different equipment, not a standard 1.5 inch attack line.

The main idea is that flow for a handline is limited by the hose diameter because friction loss climbs as you push more water through a small hose. A 1.5 inch attack hose is designed to deliver a practical range of flows that balance acceptable nozzle pressure with manageable friction loss. That makes about 40 to 125 gallons per minute the typical operating range. At the low end, you can still flow around 40 gpm with a suitable nozzle setting; at the high end, you approach roughly 125 gpm before the friction loss and required nozzle pressure become impractical for a handline. Flows significantly above this range would usually require a larger-diameter hose or different equipment, not a standard 1.5 inch attack line.