Let the water do the work! Sky Hook Pressure washers come with explosion-proof components so they can be used all over the rig site. The electrical system uses a magnetic starter instead of a manual starter which allows the use of an off delay timer that is preset at 30 minutes. Although the pump can be run dry indefinitely, the delay timer protects the system from the operators that do not shut the system down after use. If you have a leaky wand and the system is still pumping, it could cause potential environmental issues costing the customer thousands. It also protects the system from overheating if operated in the bypass for long periods.