Push-on & Barb Fittings

Q: What size push on fitting do I need for a rubber fuel hose?

Choose a push on fitting by the hose’s inner diameter, not its outer diameter. For Evil Energy AN push lock hose ends, 4AN matches 1/4 inch ID hose, 6AN matches 3/8 inch ID hose, 8AN matches 1/2 inch ID hose, 10AN matches 5/8 inch ID hose, and 12AN matches 3/4 inch ID hose. After matching the barb to the hose ID, confirm the thread and sealing type on the opposite end. Similar looking AN, metric, ORB, and NPT threads are not automatically interchangeable.

Q: Can push on fittings be used for high pressure fuel injection systems?

Push on fittings should be used in a fuel injection system only when the complete hose assembly is rated for the fuel, operating temperature, working pressure, vibration, and pressure pulses involved. The 1500 PSI specification listed for Evil Energy push lock hose ends should not be treated as the rating of the assembled hose, fitting, and clamp. The lowest rated component determines the usable system pressure. If the hose compatibility or assembled line rating cannot be confirmed, use a matched hose and hose end system with published assembly specifications.

Q: What is the difference between push on fittings and reusable AN hose ends?

They are not always opposing fitting types because a push on hose end can have an AN connection on its threaded side. The main difference is how the hose is retained. A push on barb grips compatible rubber hose through the barb and interference fit, while a reusable AN hose end uses a socket or compression style assembly matched to a particular braided CPE or PTFE hose. Choose push on fittings for compatible rubber hose when the complete assembly meets the application requirements. Use a reusable hose end made for the exact hose construction when working with PTFE or another system that requires a dedicated end. PTFE hose should not be pushed onto a rubber hose barb.

Push on fittings give builders a direct way to connect compatible rubber hose to AN, metric, ORB, and other automotive ports without assembling a multipart compression style hose end. Evil Energy offers straight and angled fuel hose fittings, AN push lock hose ends from 4AN to 12AN, and application specific hose barb fittings for fuel pumps, regulators, gauges, and custom fluid routing. Start with the hose type and inner diameter, then match the component connection and the angle required by your route.

How Do I Choose the Right Push On Fitting?

Match the rubber fuel hose ID to the barb first. On Evil Energy AN push lock hose ends, 4AN matches 1/4 inch ID hose, 6AN matches 3/8 inch, 8AN matches 1/2 inch, 10AN matches 5/8 inch, and 12AN matches 3/4 inch. Next, identify whether the component uses an AN, metric, ORB, NPT, or weld on connection. You can compare rubber fuel hose options, but confirm the selected hose is approved for the intended fluid, pressure, and temperature before assembly.

Plan the Complete Hose Connection Before You Order

Choose the port type: Use an AN push lock hose end for an AN connection, or select a metric, ORB, NPT, or weld on barb when the component requires that interface.
Choose the routing angle: Straight fittings suit open runs, while angled fittings help route hose around pumps, regulators, tanks, and tight engine bay clearances without forcing a sharp bend.
Check the complete system: The hose, fitting, clamp, fuel type, operating temperature, and working pressure must be compatible. The lowest rated component determines the limit of the assembled line.
Use the correct hose end family: Push on barbs are intended for compatible rubber hose. PTFE hose and other hose constructions require their own matched AN hose fittings. Review the Evil Energy hose barb fitting guide for additional sizing and installation considerations.

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FAQs about Push-on & Barb Fittings

What size push on fitting do I need for a rubber fuel hose?

Choose a push on fitting by the hose’s inner diameter, not its outer diameter. For Evil Energy AN push lock hose ends, 4AN matches 1/4 inch ID hose, 6AN matches 3/8 inch ID hose, 8AN matches 1/2 inch ID hose, 10AN matches 5/8 inch ID hose, and 12AN matches 3/4 inch ID hose. After matching the barb to the hose ID, confirm the thread and sealing type on the opposite end. Similar looking AN, metric, ORB, and NPT threads are not automatically interchangeable.

Can push on fittings be used for high pressure fuel injection systems?

Push on fittings should be used in a fuel injection system only when the complete hose assembly is rated for the fuel, operating temperature, working pressure, vibration, and pressure pulses involved. The 1500 PSI specification listed for Evil Energy push lock hose ends should not be treated as the rating of the assembled hose, fitting, and clamp. The lowest rated component determines the usable system pressure. If the hose compatibility or assembled line rating cannot be confirmed, use a matched hose and hose end system with published assembly specifications.

Do push on barb fittings need hose clamps?

It depends on the exact hose and fitting system. Some engineered push lock systems are designed for a specific hose without a clamp, but that rule does not apply to every hose barb fitting. Evil Energy push lock fuel hose ends recommend clamps for additional retention and sealing. Use the clamp type and installation position specified for the selected fuel hose and fitting. A clamp cannot correct an incorrect hose ID, incompatible hose material, damaged barb, or incomplete insertion.

How do I install a push on hose fitting without damaging the hose or causing leaks?

Depressurize and drain the system before beginning. Confirm that the fitting is designed for the selected rubber fuel hose and that the hose ID matches the barb. Make a square, clean cut and remove debris. Place the specified clamp on the hose before insertion, then push the hose fully over the barb to the fitting collar without scratching or cutting the barb. Use only an assembly aid approved by the hose manufacturer, and never use an open flame around a fuel system. Position the clamp as instructed, route the hose without twist or tension, and pressure test the completed line before operation.

What is the difference between push on fittings and reusable AN hose ends?

They are not always opposing fitting types because a push on hose end can have an AN connection on its threaded side. The main difference is how the hose is retained. A push on barb grips compatible rubber hose through the barb and interference fit, while a reusable AN hose end uses a socket or compression style assembly matched to a particular braided CPE or PTFE hose. Choose push on fittings for compatible rubber hose when the complete assembly meets the application requirements. Use a reusable hose end made for the exact hose construction when working with PTFE or another system that requires a dedicated end. PTFE hose should not be pushed onto a rubber hose barb.

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Push-on & Barb Fittings

How Do I Choose the Right Push On Fitting?

Plan the Complete Hose Connection Before You Order

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