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Posted by mike on January 24, 2005 at 19:40:55:
i have a 35 year old gas furnace for steam heat in brooklyn ny.
the last few winters it has needed to be filled every day when it is cold,
this week i fill it in the morning all the way up the site glass and when i get home from work it is empty or almost empty.
ther is no obvious leak, no puddles no excessive hissing no drain valve leking.
please advise on next step
thank you