Licensed General Contractor, Painting Contractor
You're absolutely right about the GX 19 being more gravity fed. It was a poor example on my part. My GX 19 is the only piston pump I have that's hopper fed, so I should've equated airless piston pumps in general to that of a siphon feeds, requiring more pressures to overcome the suction as well as gravity. I could've used any other type of piston-driven airless as a much better example.I just got a GX19 with a hopper and it's a gavity feed. There is no suction tube. I seen in the manual there are different models, although I have only seen them for sale with the hopper attached.
I am new to spraying so I can't tell it if it is good or not in comparison or how the finish is, as all the issues I have had in regards to that was me and my technique or process. However at 28lbs it's still heavier then I like. Clean up I thought would be a breeze but it seemed awkward. With the X7 I borrowed to do a fence I could hook the hose up to it and flush it out. The GX19 it appears you can't do that. Have to fill the hopper of with water and and run it thru the machine by the power of the machine. Seems like that is doing undo wear on the machine. Maybe someone can educate me if I'm missing something in the cleaning process in regards to this hopper unit.
Not sure if the Graco Magnum Power Flush Kits would work on the GX 19 without some adapter, since I dont know what size the threads are, but it'd be very easy to make something work. Standard hose end ball valve, 3/4" would be my guess.