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Old 11-19-2008, 09:42 PM   #1
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Single Pipe Steam Heat (Please help)


Hello. I'm having a problem with my single pipe steam heat system and cannot seem to find anyone in my area that has a clue. The problem is that the radiators on my second floor are not getting very warm, one not at all, when the thermostat is set between 68-72 degrees. If I crank the heat up to about 86 degrees, they will get hot. I replaced the vents on the side of the radiators and attempted to bleed the air out of them one at a time. I really had no idea what I was doing and since only steam seemed to come out of the holes, I guess there wasn't much air. The radiators downstairs get warm, and at first I thought it was because of this that the heat turned off since the thermostat is located there. After closing the line to the living room radiator where the thermostat is, there was still no heat to the radiators upstairs. Sorry for the long post, any advice will be greatly appreciated. Thanks.

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Old 11-19-2008, 10:37 PM   #2
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Single Pipe Steam Heat (Please help)


jpic: Lets start simple, if you already dont have adjustable vents then replace them with adj vents, next set the farthest vent wide open, next farthest a bit less, etc, when you get to the floor with the tstat you should be running the vents almost closed. Steam will follow the path of least resistance. What SHOULD happen is the farthest rad will heat first then work back to the stat.
If it is not too much work make sure all the main inlet valves to the rads are wide open. IF things are not old and frozen you should be able to unscrew the bonnet nuts and make sure the "washer" has not broken off and blocking the inlet.
This is the easiest thing to start with

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Old 11-20-2008, 08:51 AM   #3
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Single Pipe Steam Heat (Please help)


with a level on top...make sure the radiator is slightly tilted towards the steam supply line on that second floor.are you hearing any knocking up on the second floor when the first is heating?
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