Braided 4AN line is the most practical choice for transporting bulk amounts of fluid under pressure. Whereas, supply to multiple nozzle locations is best done in the smaller 3AN format. Fluid routing with AN fittings is a joy vs. the clumsy pipe fittings used in most kits.
These holders and fittings are beautifully anodized in black to resist 80% or stronger methanol. Find even more in our AN hose & plumbing bits section.