Wow! Thanks again, especially for the links. My application, and why I need 1/8 npt is this. I sourced 3- 30 minute scba tanks locally. They have the quick connect style valves on them, I think scott calls them snap lock. The quick connect scott fitting has a internal diameter that can be drilled and tapped for 1/8 npt. So I need 3 , 1/8 mnpt x foster fittings. I also need a fill hose with a shut off needle valve and a bleed port with a female foster fitting on each end. I will be exploring the links tomorrow. This has been a learning experience so far for sure. I had never heard of bspp, 1 x 10, foster fittings, etc until deciding to purchase a pcp and the support equipment. On that note, the leaving hose that came with the yong heng compressor seems to be plugged solid. My oil for it is not here yet so I haven't run it. Is this a faulty hose, or is it resticted on purpose to wring the water out of the air?