I had found on the internet how you can make a homemade compressor out of an old refridgerator compressor. One thing I added was a check valve on the output side of the compressor at the tank to keep the tank pressure off of the piston between start-ups. This insures the piston is not under pressure when the motor restarts and pre-vent burning up the motor. I just put a few drops of compressor oil in the intake side every now and then. I got to use it for the first time this weekend and you can't hear it running. I LOVE IT!