Fuel Compatability of PVC ? CPVC ?

I am building leading edge fiberglass tanks. I need
to insert a 3/8" I.D. tube about 8 ft long in which to insert the fuel
level probe. I have concerns about the long term effects of fuel on
the type of tubing I see in the plumbing/electrical dept in a the "Big
Box" stores. Will this type of product stand up to aviation and auto
fuel. If not I would like some idea or suggestions of a good product
for this type of application