A fuel hose is a hose used to bring fuel from one point in a vehicle to another or from a storage tank to a vehicle. It includes Fuel injection hose, Marine fuel hose, Farm fuel hose, Diesel fuel hose, Fuel transfer hose. It is commonly made of reinforced rubber to prevent splitting and kinking.
The United States Environmental Protection Agency defines a fuel line as “all hoses or tubing designed to contain liquid fuel or fuel vapor. This includes all hoses or tubing for the filler neck, for connections between dual fuel tanks, and for connecting a carbon canister to the fuel tank. This does not include hoses or tubing for routing crankcase vapors to the engine’s intake or any other hoses or tubing that are open to the atmosphere.
Marine fuel hose is specifically designed and branded for use in supplying fuel to motors in boats or marine vessels. USCG Type A1 hoses are designed for fuel feed applications where the fuel is constantly in the hose, whereas Type A2 hoses are designed for fuel fill type hoses only. The “A” refers to meeting flammability tests and the “1 or 2” differentiates the hoses for fuel permeability tests – “1” being suitable for constant fuel contact where as “2” would not meet constant fuel permeability.