Originally Posted by gunner
Unless you are really keen with originality, I would use Tygon fuel hose, which despite being a translucent yellow colour, appears to remain flexible for years, doesn't turn brown and become brittle.

That's interesting. We use Tygon for oil compensated lines on the deep water ROVs. They get exposed to plenty of UV on the back deck of the ship and massive pressure at thousands of meters depth, but I've never seen one give out.