1/8" NPT To 5/16" Barb Straight Barb Hose Fittings (Electric Fuel Pump And Regulator)

These 1/8″ NPT to 5/16″ barbed hose fittings are designed for use in low-pressure fuel systems, making them ideal for connecting slightly larger fuel lines to electric fuel pumps and fuel pressure regulators on classic Volkswagen setups. They provide a reliable solution for adapting small threaded ports to 5/16″ fuel hose, ensuring safe and consistent fuel delivery.

Each fitting features a 1/8″ NPT tapered thread, allowing it to screw directly into electric fuel pumps, fuel pressure regulators, or carburettor fuel inlets where applicable. The tapered thread design ensures a tight, leak-resistant seal when installed with fuel-safe thread sealant. The 5/16″ hose barb offers a secure grip on the fuel hose, helping prevent leaks or hose slippage under normal operating conditions.

These fittings are commonly used in upgraded fuel systems where an electric fuel pump replaces the original mechanical pump, or where increased fuel demand requires slightly larger diameter fuel lines. Fuel is drawn from the tank, passed through the pump and regulator, and delivered to the carburettor(s). These fittings act as the key connection between threaded ports and flexible hose, maintaining smooth and uninterrupted fuel flow.

For installation, you may also require 5/16″ fuel hose, suitable hose clamps, and fuel-resistant thread sealant. Depending on your setup, these fittings may be used alongside inline fuel filters, regulators, or carburettor connections.

Sold as a pair, these fittings provide both inlet and outlet connections for your fuel system components.

Vehicle Fitment

Aircooled VW:

• Beetle (1949–1979) – All engines
• Beetle Cabriolet (1949–1979)
• T2 Split Bus (1950–1967)
• T2 Bay Window (1968–1979)
• T25 / T3 Aircooled (1979–1983)
• Karmann Ghia (1955–1974)
• Type 3 (1961–1973)
• Trekker (1968–1983)
• Buggy / Baja (Type 1 based, 1949–1979)

Watercooled VW:

• T25 / T3 Watercooled (1983–1992) – when fitted with carburettor or custom fuel systems

Key Features

• 1/8″ NPT male thread (tapered for secure sealing)
• 5/16″ hose barb for fuel line connection
• Ideal for electric fuel pumps and fuel pressure regulators
• Suitable for low-pressure carburettor fuel systems
• Supports increased fuel flow compared to 1/4″ hose setups
• Durable, leak-resistant construction
• Supplied as a pair (2 fittings)