The plumbing is by no means new. I plan on going with 50 PSI, possibly 60. It is a mix of copper and brass (depending on which line). Eventualy I would like to rerun all of it, but I just don't have the time at present.
I plan on replacing the gage with a cap after I'm done adjusting the preasure.
from your answer I take it you wouldn't worry about the fact that it came set wrong? My leaning is not to care, but I'm nervouse for some reason.