Compressor Plumbing Help. (Need adapter or advice)

Hello All,

At the shop where I work we have an Ingersoll compressor.  I am in the process of adding a fan cooled aftercooler and moisture seperator.

I have the aftercooler mostly plumbed but unfortunately I'm stuck right now.

The connection between the pump and the tank on the compressor is 5/8 copper with inverted flare fittings (7/8-18) on each end (male)  I have looked high and low for a 7/8-18 (Inverted flare-male) to 1/2" npt (or similar) with no luck.   

Right now I'm thinking I might need to buy a flare kit and split this copper in half and add the male fitting which I can get adapter for.

Or

Split the copper and solder/sweat a NPT adapter on each half

Or.

Do the same with compression fittings.

Thoughts?

Cheers,

Fox

Get the shop to buy the flare tool. Master Cool brand is my preference. If the boss wont pony up for the tool I would solder/sweat, which won't take much extra heat today!

Sure it's not a metric thread?  22mm is .876 vs 7/8's .875.    I think you'd need a 22 x 1.5 to be equivalent, maybe you can find that locally?  Isn't that an o2 sensor thread pitch?