Quote:
Originally Posted by greglepore
3/8 hose. I/2 supply lines are fine. Don't be afraid of pvc in this application, although I'm sure folks will chime in that its deadly.
1/4 hose will leave your high volume tools-ie 1/2 impact-without torque.
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I would not install any main smaller than 1/2" and if there is any distance at all, I would go to 3/4". The incremental cost to install the larger lines is largely materials for these sizes as the labor (cost or effort) is about the same.
I would be one of those that will tell you PVC is deadly. I have witnessed the consequences of PVC failures in compressed air lines (100-125 psi) first hand and the thought of SHARP shards of PVC flying through the air at a person is not pretty.
There are other plastic lines that are rated for Compressed Gas services but I personally do not like them since they are very difficult to install, repair or add to properly.