To prevent a water hammer, which statement is true?

To prevent a water hammer, which statement is true?

• A. Nozzles controls, hydrants, valves, and hose clamps should be operated slowly
• B. Nozzles and hoses should be used as needed
• C. Valves should be opened quickly
• D. Hose clamps should be tightened quickly

Answer: (D)

Preventing water hammer comes down to avoiding sudden changes in water velocity and pressure. If a valve, hydrant, nozzle, or hose connection is opened or closed quickly, a pressure wave can race through the piping and cause a shock that can damage fittings and the piping itself. The safest and most effective approach is to make gradual, smooth adjustments to controls—opening, regulating, and closing them slowly so the flow ramps up or down without a surge. This principle applies to all parts of the water-delivery system, including hose clamps, which should be adjusted with care to maintain steady flow rather than causing abrupt changes that could trigger a pressure spike. In short, slow, deliberate actions minimize the risk of water hammer and protect the system.

Preventing water hammer comes down to avoiding sudden changes in water velocity and pressure. If a valve, hydrant, nozzle, or hose connection is opened or closed quickly, a pressure wave can race through the piping and cause a shock that can damage fittings and the piping itself. The safest and most effective approach is to make gradual, smooth adjustments to controls—opening, regulating, and closing them slowly so the flow ramps up or down without a surge. This principle applies to all parts of the water-delivery system, including hose clamps, which should be adjusted with care to maintain steady flow rather than causing abrupt changes that could trigger a pressure spike. In short, slow, deliberate actions minimize the risk of water hammer and protect the system.