Will vinyl hose work on fuel lines?

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asked Nov 18, 2022 in Repairs/Maintenance by JoeBonner (1,400 points)
Will vinyl hose work on fuel lines?

2 Answers

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answered Feb 27, 2023 by 7maxwarren (13,880 points)
Vinyl hose will not work on fuel lines as vinyl cannot withstand the contact with fuel and will degrade and leak.

Also gasoline and other fuel tends to make a clear vinyl hose go hard, and when that happens the pipe may become brittle and the seals at each end may be compromised.

Silicone tubing and hoses are not resistant to gasoline as silicone hoses are porous and not suitable for fuel or oil.

Stainless steel can be used for fuel line as it's resistant to fuel and good for high pressure as well.

The best material for fuel line is braided stainless steel fuel line that has much higher heat resistance and withstands high pressure liquid better than other fuel hose.

Rubber fuel hose is also good for fuel line.

Fuel lines don't usually need Teflon tape if you're using compression fittings.

However some fuel lines may need Teflon tape depending on the type of fuel line connector you're using.

You can Zip tie fuel lines to hang them or to also submerge the fuel hose in gasoline or diesel.

Plastic zip ties are fuel resistant and safe to be submerged in fuel.

Nylon fuel zip ties are also fuel resistant and also resistant to most chemicals.

The hose clamps for fuel line should be tight enough so that it's squeezes the fuel line somewhat and tight enough so the hose cannot be pulled off.

Tighten the hose clamp a little at a time and check the hose.

Just make sure the fuel hose clamp is not tight enough to cut into the hose.

You can use polyurethane tubing as fuel line as it has exceptional resistance to most gasoline, oils, kerosene, and other petroleum-based chemicals, making PU tubing and hose an ideal choice for fuel lines (although additives in today's gasoline and petroleum products warrant field testing).

The kind of hose you can use for fuel line is rubber fuel line hose that is rated for fuel.

SAE 30R7 hoses are designed for fuel.

Rubber hose that is rated for fuel can be used for return fuel line as well as pressure fuel line.

When using rubber hose for fuel line pressure make sure the rubber hose is rated for the fuel under pressure.

However any fuel hose that is rubber will be okay for fuel return line.

However just note that regular non fuel rated rubber vacuum or heater hose should never be used in fuel applications.

The hose will deteriorate from the inside out and can plug fuel filters and carburetors with rubber debris, long before it springs an external leak.

SAE 30R7 hoses are designed for fuel.

These can go under the hood and are typically used for low-pressure applications like carburetors or a fuel return line.

It can also be used for PCV connections and emissions devices.

SAE 30R9 hoses are designed for high-pressure applications like fuel injection systems.
0 votes
answered Apr 11, 2024 by JHsealstrip (340 points)

Vinyl hoses are generally not recommended for use with fuel lines. They are not designed to withstand the chemicals present in fuel, such as gasoline or diesel, and may degrade over time when exposed to them. This degradation can lead to leaks, which can be hazardous. It's safer to use hoses specifically designed and rated for fuel applications, such as those made from materials like nitrile rubber or fluorinated polymers, which are compatible with fuels and resistant to degradation.

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