At 05:58 PM 4/14/2010, Robert Fisher wrote:
>This reminds me of a question I keep thinking of and forgetting to ask:
>Where is full/normal on the expansion tank? I see a "min" mark just above

Normally it purges air from the system and runs completely full, no
bubble at all.  Something funny going on.  I hope it's not gas
leaking from the cylinders but you can find out by testing the
pressure tank headspace for hydrocarbons.

Yours,
David