big thing here...yes, you can use a tire gauge, but the 12#'s is with an
empty system. Theoretically you can take your current system pressure and
add 12#'s and that should be fairly close to what your bladder pressure
should be.

Yes, 180deg will be a higher pressure, that's what the expension tank is
for...to accomadate that pressure.



"Rsrtgsprngs" wrote in message
...
Thanks for your reply.

He tapped on it and it did not sound full of water and the bottom was not
warm. He did not check the pressure. Can I just put a tire air gage on it
to
see it if has the 12 lbs. the label says it should be charged with?

So gfar the weather has been mild so I haven't raised the water temp above
about 130 degrees. But for winter it's usually 180. That will expand the
water
more giving higher pressure. Am I right?

Could there be too much water in the system? And if so how do I know not
too
drain too much?

I love hot water heat but grew up with steam heated radiators and at least
the
water glass on the boiler let you know if there was too much or too little
water in the system.