From my experience in pneumatic automation and materials handling, (I sold a
LOT of tubing), the answer is probably not. PVC reacts with a lot of aeromatic
hydrocarbons, and gasoline is a very powerful one. But if all you need is
3/8" ID, you can probably get what you need at an auto parts or marine store.
DO NOT tell the guy its for an airplane. Tell him you need 3/8" ID fuel hose
for your hotrod / custom / racing boat, etc. Then ask if its rated for leaded
racing fuel. A good parts house should have something that will work. A
racing / custom car shop would probably be an even better source. Make sure
that whatever they try to sell you is marked on its side as "fuel hose".

If that doesn't get you anywhere, e-mail me. I'll hook you up with one of the
tubing suppliers I used when I built drum-pump based chemical transfer systems.


Harry