How does the number of bends affect friction loss?

• A. More Bends Increase Friction Loss and Reduce Efficiency
• B. More Bends Decrease Friction Loss
• C. Bends Have No Effect on Friction
• D. Friction Loss Only Depends on Hose Length

Answer: (A)

Each bend in a hose or pipe creates resistance to flow. When water must turn a corner, the flow becomes turbulent and eddies form, which dissipates some of the water’s energy as heat. This adds a loss of pressure, known as friction loss, beyond what is caused by straight hose length.

Because every bend contributes its own loss, adding more bends increases the total friction loss for the same flow rate and hose size. That extra loss means more pump pressure is needed to maintain the same nozzle pressure, so overall efficiency drops as bends accumulate.

The other ideas aren’t accurate because bends do not reduce friction, and friction isn’t determined only by hose length—bend losses add to the straight-wall friction.