The device is made up of a pump, which is either electric or gasoline driven, a high-pressure hose, and spray tip or nozzles. Water is supplied from an outside source. So the water amount should always be adequate. A decrease in water amount can lead to damage of the pressure washer.

Pressure washers should always be used with caution. These can prove quite harmful if not handled with care. Always use eye and ear protection. Do not leave the machine unattended. Keep children and pets far away from the device. Store it in a safe place out of reach of children.