What is the risk of pumping too high a nozzle pressure for a given line?

• A. Decreased friction loss and smoother operation.
• B. Increased friction loss, potential nozzle damage, and reduced control.
• C. No impact on nozzle performance.
• D. Faster water delivery with no drawbacks.

Answer: (B)

Pushing nozzle pressure higher than what a line is designed to handle increases risk in several ways. Friction loss in the hose grows with higher flow, so more pressure means more energy is wasted overcoming hose resistance and more heat builds up along the line, which can shorten hose life and stress fittings. Nozzles and their components have maximum rated pressures, and exceeding those ratings can lead to seals, gaskets, or the nozzle body failing or leaking. The stronger nozzle reaction at higher pressure also makes the stream harder to control, reducing the operator’s ability to aim and steady the line. For these reasons, too much nozzle pressure raises the likelihood of damage and loss of control, outweighing any marginal gain in speed.