Hi I have a small question can I put my pressure gauge in the safety valve port and visa versa? The way my compressor is in my garage means I can't see the gauge anymore!
Yes, but be aware that they are probably brass and installed with Loctite or similar. Use the correct sized spanners. Open end for the gauge (it might need to be fairly thin) and, ideally 6-point, ring for the valve. You'll probably need to remove the split-ring to get the spanner on. I mention it only because I've dealt with quite a few that have been knackered by folk trying to undo them with adjustables.
My compressor lives outside. I have the pressure switch, a big pressure gauge and relief valve on the wall in the garage.
I didn’t plumb them into the main airline but used some other threaded hole in the reciever.