It is a genuine item that is supplied by the original manufacturer for use with Graco paint sprayers. This is a special dump valve which allows a user to release the pressure. If the valve is malfunctioning or is damaged, this part will provide an identical replacement for the original component that was installed on a new unit. Check the...Read more owner's manual and the parts diagrams for your model to ensure the exact location and the correct application of this dump valve. Note,t his high-quality component is sold as an individual item.