Air compressor fitting ID help

[jjdeneen918]

Came off the Wits End air system manifold.

It’s got a small pin hole on the main tightening facet that is constantly spewing air, not allowing my rear tank to fill.

Hopefully someone can help ID this part.

I’m at Grainger now, they can’t identify it either.

 

[thatcabledude]

So it’s threaded into a manifold and not the York compressor itself?

 

[jjdeneen918]

Photo of opposite end.

 

[jjdeneen918]

It’s part of the under hood manifold system he designed & sold.

 

[Not So Yeung]

I used image search with Google Lens. It is a check valve for air compressors/ pneumatic systems.

 

[NeverFinis]

Looks like a pressure relief valve.

 

[jjdeneen918]

Those are all my thoughts too.
I also google images it, numerous types of valves appeared, but nothing was specific.

If anyone knows for sure, a part number or link to a site would be amazing.

I haven’t found anything yet myself, at Grainger, or Napa.

 

[Not So Yeung]

Those are all my thoughts too.
I also google images it, numerous types of valves appeared, but nothing was specific.

If anyone knows for sure, a part number or link to a site would be amazing.

I haven’t found anything yet myself, at Grainger, or Napa.

I would email those pictures to pneumatic part stores and see if they can ID it. They can help you better than a car enthusiast forum

 

[jjdeneen918]

I got some better/more complete pics now that I’m back at the repair shop.

It threads directly to the inlet of the manifold. There is an AR adapter fitting to attach the inlet hose to the non vacate side of it.

 

[ThreeEyedBandit]

Looks like an unloader check valve, that's likely why it has a hole in it. Can you show us the hole? Can be replaced with either type of check valve.

 

[NeverFinis]

Looks similar to this one, CDI model: PA-12:

Cdi Control/Unloader Part Pa-12 • Compressor Now Parts Sales

3/8 "Fpt X 3/8" Mpt Load Genie 3-12 Scfm

compressornow.com

 

[jjdeneen918]

Just by the above photo only, it’s hard to say 100%.

I do think I found it at McMasterr-Carr.
Part number 8549T16. $36.10.

I ordered it & will show up tomorrow to confirm.

 

[Not So Yeung]

I think that side could be a compression fitting?? Is there a missing ferrule ring?

 

[Marvelicious]

Unloader check valve. Had a similar one on an old craftsman compressor.