can't you put a brass valve on the bottom of the tank then connect to
the site guage? Only turn the valve on when looking at the guage....
If it cracks (or burns) you only lose a very small amount into the bilge.

Wayne.B wrote:
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.