Help me about plumbing size of air the compressor discharge port?

by Yankeeflyboy

I recently purchased a 60 gal stationary compressor. I plan to run 3/4″ copper lines throughout my shop. The discharge port on the compressor is 3/8″ in a large reducing bushing, apparently 2″.

Would it be advisable to replace this bushing with a 2″ to 3/4″ or just to use an adapter to increase from 3/8″ to 3/4″?

It just seems strange that the port is so small.

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A 3/8″ hole will flow a lot of air, Yankeeflyboy.

However, if this were my compressor, I would certainly remove the 3/8″ and use the 2″ to 3/4″ reducer bushing to remove any flow restriction that may be caused by the 3/8″ discharge port.

Why reduce the flow through the 3/8″ and then plumb back up to a larger pipe? Go with the 3/4″. It can’t hurt, for sure.

And, I applaud the use of copper as an air line for all the reasons written about on the pages of this site.

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