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Posted by Harold hydronicnetwork.net on December 30, 2003 at 09:02:36:
In Reply to: the shutoff valve is the original (150+yrs old) posted by ken on December 29, 2003 at 18:52:14:
A one-pipe system often has a hand valve to service the radiator screwed on the bottom tapping of the radiator.
"The steam valve is on the other side of the radiator from where the shutoff valve is."
This radiator seems to have a steam valve on one side of the boiler attached to a pipe, and a shutoff valve on the other side of the radiator, making the radiator two-pipe. As we discuss the installation, the radiator piping changes while nothing has changed in 150+ years. Yet the radiator has a steam vent.