Universal Aluminum Fuel Hose Fitting - 1/4" NPT x 3/8" Barb - (Anti-Siphon Valve)

The Universal Aluminum Fuel Hose Fitting – 1/4" NPT x 3/8" Barb with Anti-Siphon Valve is essential safety equipment for anyone running a boat with an outboard or inboard fuel system. Fuel line leaks and siphoning incidents represent some of the most dangerous—and avoidable—failures in marine operation.

This compact fitting bridges two critical fuel system components while preventing accidental fuel siphon, which can drain your tank when the engine is shut down or if the fuel line ruptures above the tank level. Built from lightweight aluminum alloy, this fitting combines durability with corrosion resistance—critical in saltwater and freshwater environments alike. The integrated anti-siphon valve automatically closes when fuel pressure drops, blocking backflow and preventing fuel from draining through a ruptured or disconnected hose.

Any boater upgrading an aging fuel system, replacing damaged fittings, or installing a new fuel line assembly will benefit from this universal design. It's equally suited for portable fuel tanks, engine fuel inlets, or remote fuel filter applications, making it a versatile choice for various marine fuel systems.