>  BM> If your gauge is leaking air, you are indeed risking a situation 
here
 >  BM> some point in time that gauge will explode, first blowing glass all
 >  BM> over the place, and since it's a high pressure line, you will empty
 >  BM> your air supply very rapidly.
 >   It's not leaking air, water is leaking into the gauge housing.
 >  BM> If any water is coming back into the gauge, you are also risking a
 >   Hmm. What do you mean "back"? I don't see how water could leak back
 >   in a high pressure line.
I didn't mean water leaking into the high pressure line.  I meant if salt 
water is leaking into the inner part of the glass, then corrosion will take 
place eating away at all the mechanics until the gauge weakens and blows out.
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