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The original AIR2 hose is dual purpose and made of 2 parts: the AIR2 end of the hose has a standard female thread, same as a second stage hose, plus a screw-in AIR2 specific piece. If you look real hard into your closet, I'm sure you'll find, like me, the same screw-in pieces for regular inflators. So the same hose is good for both standard inflators and AIR2's.
With that said, the AIR2 and its hose are pretty much unbreakable. The only issue I've ever had is a dried out o-ring in the hose that's easy to replace.
Edit
If digging into the closet is too big of a deal, Trident sells these parts:
- A139: reg hose to AIR2
- AA41: reg hose to inflator
Some Air2 hoses are std LP hoses with an Air2 connector screwed in to the end, others have the Air2 connector crimped on to the end of the hose and are not readily removable. There is an adapter to convert an Air2 hose connector to an std LPI connector. Going in that direction, there is no issue with flow capacity.