What is this air compressor part called?
Moving to: m/AskMbin!@kbin.social – 0 points – 
And what does it do? My air compressor cannot get above 60 PSI, it should get to 120 psi. I noticed this piece is where I am losing pressure. Can I replace it?
Moving to: m/AskMbin!@kbin.social – 0 points –
Looks like a pressure release/safety valve, and yes you can replace it. But it looks like you might want to try cleaning it out first.
Agreed, It looks fairly easy to disassemble and clean. I would attempt that before replacing. You may find a YouTube vid or two showing how. Pvc thread tape is your friend. Dirt in the valve will stop it from closings properly as pressure builds.