Ok, a couple of important questions to get some needed information:
1) What is the max. pressure that you want to produce? or will be available from your compressor?
2) Are you burying this air line or will it be on the ground or overhead or in a building? (heated or?)
3) Is this 80ft a straight run outside?...or is it 80ft equivalency of a variety up bends, height changes etc as it weaves through and to your new addition?
....lets start there and we can help sort this out.
All good
Coley
