Is R9 still the spec to use for fuel hose

I did try and do a search on here but nothing specific came up. I might be opening an old can of worms here but with e10 and e5 what hose do we recommend and where from? Is the stuff from jk any good? The last time I read about it, R9 was recommended.

Sorry if this has been talked to death.

https://www.justkampers.com/n020355...w-t2-split-and-bay-vw-t25-sold-per-metre.htmle

 

100% ethanol safe hose from Coolair does the trick
https://www.coolairvw.co.uk/product/hosebio55/

 

In theory SAE J30 R9 should be resistant to E10 fuel, in practice it seems to last just months or a few years. 100% biofuel resistant hose is better. https://vwaircooledworks.co.uk/Fuel-Hose-Safety-Campaign

I wouldn’t buy fuel hose from JK.

 

I seem to remember that no part of the SAE J30 R9 refers to it's use specifically with E fuels, just general suitability for "fuel" as opposed to water. IIRC the R part was to do with pressure , R7 being general, R9 for injection.
So, some R7 and R9 hoses are ok, some less so. Best to go by a manufacturer who makes the E claim specifically. I like Gates. Not knocking the 100% resistance route of course, what could be better? A little bit of me wonders whether it will prove to be susceptible to something else though.

 

Indeed re the "R" rating.

Gates 3225 will do you nicely, and it's available off the reel at your local motor factors.

 

This^

SAE 30R7 hoses are typically used for low-pressure applications like carburettors or a fuel return line.
SAE 30R9 hoses are designed for high-pressure applications like fuel injection systems.
Often SAE J30R9 is also CARB approved meaning it is EPA certified to a low permeation standard. This means the hose is designed to contain fuel evaporation through the cover.
SAE 30R7 or SAE 30R9 ‘should’ be suitable for E10 fuel but SAE 30R7 has a relatively high permeability.

 

Thanks everyone. I mostly put e5 in my own bus so I have a few options here. The t25 I'm working on at the mo has R6 hoses fitted and they look in a right state!!

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Gate’s off the roll probably cheaper and more likely to do what it claims to do

 

Hose discussions always get a bit heated

As I recall, the Gates data sheet (can't find it now) rates 3225 up to E15. Believe @77 Westy does have a point about permiability...but is that such a problem?

A while back, I did a post mortem on Gates that had been on my van for about 5 years. No sign of any deterioration, inside or out.

 

Only safe hose to use for bio fuels is FPM or FKM Viton rubber. Expensive, but the best.

 

There are some hoses from Gates, Goodridge and Cohline that can take 100% ethanol , and withstand 120C heat with ethanol in them. Get the part number before purchase, read the datsheets. For at least one if the common Cohline hoses they reach 120C only with diesel in them for instance. Its 100C with ethanol for the same hose.
Otherwise expect surface cracking on tight corners at hot spots above the engine.
I am really still annoyed that my local bunch replaced a metre of Goodridge 200 and threw it away with some R7 when they replaced my tank. That's £35 and emptying the tank myself, a task I paid them for when they swapped the tank..

 

Never trust fuel hose called "Colin".

 

Just buy direct. Advance Fluid Solutions

 

Good shout, looks like about 30% saving.

 

Gates barricade .

 

Yes checked the datasheet 125C, 100% ethanol..

 

Sorry to hijack the OP...
I need to change the fuel pipe from tank into the engine bay (the bit above the gearbox) and mine has a filter in-line in that location.
What is the diameter of the hose there please? eg internal/external? Can't really see without removing...
The tank has plenty of fuel in it - any practical tips for swapping/replacing the hose without losing (too much) fuel?
Ta mutchly

 

5.5mm, that's internal.
Clamp at tank end.
replace all the pipe apart from that last connection.
Whip off on smartish.
This is soooo easy if you take the RH rear wheel off and look/reach through the gap.

 

6mm outlet from the tank but that might change to 8mm at the filter if you have aftermarket carbs. The new hose ID should be slightly smaller than the pipe OD (5.6mm hose for 6mm pipe).

Make up the hoses and change at the tank as quickly as possible but bear in mind if the tank outlet is crusty, it might pull out of the tank or break off. I’d wait until the tank is near empty to minimise loss if the worst happens, or drain the fuel into containers before you start.

Don’t forget to fit the hose clamp on the hose before trying to connect it at the tank – and ignore the myth that worm drive hose clamps are not proper hose clamps, but they must be the correct size.

 

Thanks both, and OMG @77 Westy for the added jeopardy ...