Clear hospital tubing?
If you're talking about the clear, "hard" (as compared to surgical tubing), yet flexible tubing, it should be fine. I believe it's the same stuff they use in fish aquarium air lines and I've use that for my glow engines for years. Before surgical tubing, it was either that or the black neoprene fuel lines. I hated the neoprene because you couldn't see where the fuel was in relation to the fuel inlet. I liked the clear tubing because you could tell when the fuel reached the carb.