This past weekend, my downstreamer quit drawing chemicals from the tank. Didn't have what I needed to fix it. So, we only had about eight trucks left, and I mixed a little acid in with my soap and degreaser in my upstream chem tank. Bad for your pump I know, but man did it work wonders in washing. It cut my time in half and did a great job at brightening the aluminum. What I'm wanting to know is if there is something on the market or something I can rig up to my high pressure line(like a downstreamer hooks in) that will draw or inject downstream chemicals but at high pressure?