What problem may arise due to a water hammer?

A water hammer occurs when there is a sudden change in the flow of water, typically caused by the quick shutting off of a valve. This abrupt change generates a shock wave in the fluid, which can create significant pressure spikes in the system. The rapid pressure changes may lead to physical damage, such as bursting pipes or damaging fittings and valves. In the context of firefighting equipment, the hoseline or pumper can incur serious damage due to these pressure fluctuations, making this choice the most relevant. Proper maintenance and awareness of water hammer effects are essential to protect equipment from such damage during firefighting operations.