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Need help, on how this regulator works

DanHolohan
Member, Moderator, Administrator Posts: 16,289
Nice find!
Retired and loving it.
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American Radiator Company boiler
Went to look at this very old boiler made by American Radiator Company. The boiler is round stands about 4' tall, its hot water gravity. What I would to know is on top of the boiler is a regulator #ARC0801-A it has a lever on it about 2 1/2 feet long with a weight that can be moved up and down the lever. Does any one know how this is suppose to work. Thanks Mike0
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