Tim, thanks for reposting that TPtools link on air line systems. That definitely takes all the fuss out of design questions (at least it did for me). Very simple but lot's of options. One question, how did you attach the pipe to the walls (assuming walls structure is wooden, and not metal like Jays shop)? Did you use the TP brackets? Suppose you could use those metal conduit straps that would be much less expensive.
Allan,
I think I used the brackets that Home Depot sells for the black/galvanized pipes?
galvanized tube/pipe strap/hangers
