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wrote:

The glass water gauge on my boiler is so dirty, i cant tell how much
water is in the boiler. I have been told i need to remove it, clean it
and replace. I have a good idea of how to do it, but need advice from
an expert. Do i simply shut off the two valves on the gauge (one at
the top and one at the bottom) remove it and clean. Is there any thing
else i need to worry about, or any trick to doing this successfully?

Get the rubber gaskets and a new gage glass ahead of time-
the rubbers will be hardened and the glass will break :-)

Jim