On Thu, 06 Apr 2006 20:52:15 -0700, Tamaroak
wrote:

The sight gauges on my diesel tanks are so cloudy they are worthless.
They are made of some 1/2" plastic pipe and I want to replace them. The
company I'm dealing with is so gutless and liability oriented they won't
tell me whether diesel will destroy or erode their ester-based
polycarbonate tubing.

There's another issue which is heat resistance in a fire. If your
sight guages melt down in a few seconds of exposure to flame, your
entire fuel tank is now emptying into the fire.