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Old July 19th, 2007, 03:29   #33
Delierious Designer of Dastardly Detonations
MadMax's Avatar
Join Date: Dec 2001
Location: in the dark recesses of some metal chip filled machine shop
All the gauge does is show if the ID of the oring is too small which occurs because the retainer ring is squishing it to a smaller diameter. If the ID is too small, it'll stop the tube from falling past so it'll sit high.

If the ID is at the design spec for the tank, the gauge will fall in and fall back out.
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