what does an unloader do on a pressure washer
Get To Know The Unloader On Your Pressure Washer. Your pressure washer has a safety device known as an unloader. This device is located on the high-pressure side of the pump and usually has a large spring or black plastic handle or adjustable nut on it. The function of the unloader is to relieve excess pressure before your pump blows up. While that sounds dramatic, think about your system for a moment. You have lots of horsepower driving a pump that is creating three to four thousand PSI of pressure. When the gun is open, the water flows and it does its work.