i made a tee gun today and i wanted to see if it would work. so i plugged in the hose and the compressor and it started misting! but then i took it off the water and the air. when i tryed to reconnect it to the air WITHOUT the water connected i got blasted in the face by water from my compressor line.. whats wrong? also how do you set your psi at one thing i have a craftsman compressor and am unsure. thanks for the help all.