Identify Paint Sprayer Issue

So I'm working with my sprayer. The thing started sucking air. I've got, you know, maybe a half a gallon of paint in there and I'm going to use a sprayer saver. A sprayer saver will just have your 5-gallon bucket or gallon bucket or quart tilted right there. Now your paint's going to move to one side and you're not going to suck air. You can get all the way down to