I have 3 compressors and 2 diff tanks. One set of horns and my airbags run off a 3 gal tank that is filled with a viair 280 with a 150 psi cutoff. My big set of horns are run off a 20 gal Kenworth air tank. I t also has 7 ports on the tank for various add on's. That tank is filled with twin viair 450's. It's also 150 psi. I can run an air impact off of it and refill my own tires after a glamis airdown or what ever