This is a RapidAir 1/2" tubing system made to distribute compressed air through out your shop. I set up my system different than how RapidAir suggested because I didn't want trapped water at the air drop outlets. Take a look and hopefully this will give you some good ideas. I used 1/2 regulators and filters at the compressor and at the start of the RapidAir system. All of the drops have a 3/8 filter regulator.