I would just build a sturdy shelf on the wall to support the compressor. I would also make up an air dryer manifold system attached to the wall with a quick connect fitting to the compressor. This way you get the maximum use out of a portable system. Some folks like a compressor hose reel connected to their manifold system to keep things neat and tidy.

 

What ever you choose to do, make sure your compressor is secure. People dont realize that the tank is truly a bomb! Treat it like its a propane grill tank. Also, make sure you drain off the water in the tank regularly. I get rid of my compressors and tanks after a few years, they rust inside. I plan on piping mine in from my shed incase it lets go. Ive seen what happens afterwards. I also heard stories of the side of a small box truck getting blown off. The compressor is by far the most respected power tool in my shop.

 

You didn't mention the weight and shape/style of the compressor. I assume it's on the small side if you are moving it up and down and taking it to jobs. Also you did not mention how high up you are thinking of mounting it.

If you are considering mounting it up on the wall, it's because you want it out of the area where you are working, or otherwise you would just put it on the floor where it would be safest. It might be worth installing it on a shelf under a workbench, so it's out of the way and off the floor, yet not "hanging" above people.

If the compressor fell from a significant height I would be more worried about it falling on someone or onto equipment causing severe injury or at least making a mess. Remember that since the compressor vibrates, fasteners can fatigue and fracture, or gradually work loose, and a compressor on a shelf can "walk" around very slowly over time. It sounds sketchy on the surface of it, so do make sure it's rock solid secured, perhaps with a backup safety chain in case all goes wrong.

I have a pancake compressor in my shop that's forever in the way, and I am building a new shop bench with a dedicated place for it to sit. It will be off the floor but down at knee level. I could take it out and set it on the floor if required, and easily put it back. The fact that my bench might vibrate is on my radar, although that will not likely be an issue for my projects (no sailboats inside bottles, etc.).

 

I've been wanting to put my portable on the wall to get it out of the way and save some space but I haven't been able to come up with a practical way. I use to roll it up onto the bottom of a portable table in the shop and that worked pretty well for me. My Dewalt is weird as it has to be in a 45 degree angle for optimal draining of the tank and the better position to read and adjust the gauges.

 

Do not use PVC for stationary air lines. If damaged while under pressure or if overpressured PVC air line can explode and throw shrapnel.