Plumbing my garage for compressed air...

I ran a grey 1 inch sch 80 pvc overhead where its out of harms way. From the compumper up and all the drops are 1/2 galv.
To understand why I've used 1 inch and 1/2 inch when the hose connection to the air tools is only 1/4 inch you have to understand line restriction and the difference between volume ( cfm ) and pressure.
My pump is a horizontal unit on wheels. The first connection is actually a rubber hose with quick connect. There have been a couple of times over the years that I ran the pump on 220 to full charge and rolled it out to a truck and went to a disabled vehicle.
Enough stored pressure to whip a front drive axle job at least.
I roll it outdoors twice per year to drain the condensation from the tank too.
Everyones setup is different and I wont insist mine is the best but I haven't found anything I couldn't do yet.