Sullivan ProFlex Fuel Tubing

[Steve Scott]

I picked up a 2' length of this yellow-colored tubing.  Allows you to use either methanol-based glow fuel or gasoline-based fuel.  Diesel, I don't know but this stuff isn't cheap.

I've had an issue with the silicon tubing we've used for years when plumbing our smaller plastic tanks for uniflow clunk setup in that the thicker walled silicon was pretty inflexible.

Anyone tried the Sullivan ProFlex product yet?  It appears (initially) a bit more pliable.

EDIT:  Added product link
http://sullivanproducts.com/product/s211/

[George Albo]

I haven't tried it, but if you end up liking it, you can buy it here at a substantial savings:

http://www.usplastic.com/catalog/item.aspx?itemid=90245&catid=864

[Steve Scott]

Pretty sure the Tygon is not the same stuff.

[Skip Chernoff]

I have used it and it works great!

[katana]

If it is Tygon then it suffers eventually with unleaded gas - goes hard and brittle - seemed ok with leaded gas on our Dragbikes!

[phil c]

Pretty sure the Tygon is not the same stuff.

It's most likely a modfied urethane tubing.  That is fuel proof for both gasoline, diesel, petroleum oils, and alcohols.  Urethane is generally pretty stiff for fuel line.  Or it may be a variant of Viton, which is a fluoroelastomer(fluorinated synthetic rubber)-.  Viton can be made pretty soft and is resistant to almost all solvents and oils except alcohols.  I've used Viton for fuel line and it holds up well, since we don't keep it soaking in fuel.

Viton is just 3-5 times the cost of anything else and not readily available.

[Walter Hicks]

Phil I agree this stuff was too stiff for sure in a clunk tank.

[Randy Cuberly]

It's most likely a modfied urethane tubing.  That is fuel proof for both gasoline, diesel, petroleum oils, and alcohols.  Urethane is generally pretty stiff for fuel line.  Or it may be a variant of Viton, which is a fluoroelastomer(fluorinated synthetic rubber)-.  Viton can be made pretty soft and is resistant to almost all solvents and oils except alcohols.  I've used Viton for fuel line and it holds up well, since we don't keep it soaking in fuel.

It's definitely not Urethane based and it's very flexible.  My guess is that it's a flouroelastomer based tubing, maybe similar to viton!  It's very thin walled and tough but very flexible.  I've used it in plastic tanks for some time with great success!  It seems to last forever!  Expensive but good stuff!

Randy Cuberly

[Brett Buck]

I haven't tried it, but if you end up liking it, you can buy it here at a substantial savings:

http://www.usplastic.com/catalog/item.aspx?itemid=90245&catid=864

     The ProFlex line is definitely not Tygon or anything like it. It's more like some sort of rubber and much more flexible than silicone, almost as flexible as good old  gum rubber - but presumably won't fall apart or get sticky.
   
      The two question marks  are whether it can stand up to touching an exhaust header, and whether or not it "welds" itself to metal fittings like silicone

      Brett