Dan, Most of the clear tubings for the medical, food service and industrical applications have got plenty of clear industrial grades but most operating temperatures are below 200 degree F. To get into the clear tubing with a low hardness that would be flexable would be at about into the 400 degree range, stiff and expensive. The tubing that I use on the fuel baffle is $3.00 per inch and is clear and made to resist chemicals. 50 ft minium. Pressure isn't the problem, it's temp. If your using a clear Poly tubing, most likly the temperature rating may only be 125 to 165 degree. It won't last long as Toby say's. I have all kinds of samples on tubing for all applications. John Hervey www.specialtauto.com --- In dmcnews@xxxxxxxxxxxxxxx, "miltdanfoss" <dan.foss@xxxx> wrote: > since I just got it all bled after I installed my own version of the > auto bleed (with clear tubing).