This is the main inlet valve for many of Graco's Magnum airless paint sprayer. Rather than a barbed hose connection, this inlet valve has 1/2" threaded port, where the inlet tube screws into the valve rather than pushes in. This valve will only work with paint sprayers that have a threaded inlet tube.
For Use with these Airless Sprayers:
103413
103338
115719
288818
245070
197607