GP EZ4040 DIRECT DRIVE PUMP MADE READY WITH THE UNLOADER AND INLET ASSY FOR A QUICK CHANGE. PRESSURE SETTING IS NOT ESTABLISHED SO THIS MUST HAVE THE PRESSURE SET ONCE INSTALLED BY UTILIZING A PRESSURE GAUGE. REMEMBER TO RELEASE THE TRIGGER TO KNOW THE SETTING ON THE UNLOADER IS NO MORE THAN THE RATED PRESSURE OF THE PUMP.