The Stovebolt Site Forums The Shop Area Paint and Body Shop Air line max run length

Setting up to paint some parts on my COE. Would like to use my new 14’x22’ shed as a booth. I don’t have power run to it so was thinking of just running a temp air line out to it with a regulator in the shed, how long of a run could I get a way with before running into air supply problems. My compressor is a newer 220 volt 80 gallon 2 stage. This would be used for fenders doors,

Let the games begin!

You can offset length of the air line with larger size. It depends on your paint gun CFM/pressure demand. You could also pipe directly to the compressor and put the regulator at the end of your pipe where you connect your final hose and paint gun. Don't try to run 3/8" ID hose at the lower pressure, because you'll likely run out of air. As a WAG, I'd say you could probably use a 3/4" pipe at tank pressure.

If you can tell us how far you need to run, and what your gun demands, I could probably give you a better estimate of size needed.

I'm running 60' of 3/8" hose around my house to my side work area. Filter and regulator at the paint area end. No issues to date.

The run from compressor to the point where I’ll have the regulator is a little under 125’. I was planing on running 100-125 psi from the compressor to the regulator. This is a temp set up so if I do this I wanted to run hose and paint and roll it up at the end of the day. Gun are all hvlp. Hose was thinking of 1/2”

I knew that there would be a table:
https://www.engineeringtoolbox.com/air-flow-compressed-air-pipe-line-d_1280.html

Looks like pressure drop is about 10% per 100 feet of line. Allow for 15% loss and you should be OK.

That’s some good info. Got me thinking more about loss of cfm at the end of the run. But looking at the tables in the link, I think I’ll be fine.
Thanks for the info!