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One pipe system minimum pipe diameter

Can I run a one inch line to feed a small one pipe steam radiator about 10 feet from the main?
Radiator is about 2 feet high and 2 feet long
Radiator is about 2 feet high and 2 feet long
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Comments
The slope on that line has to be good.
Bob
Vaporstat with a 12oz cut-out and 4oz cut-in
3PSI gauge
How do I calculate edr?
The rad 2 feet high, 2 feet long, and 9 inches deep with three columns
Vaporstat with a 12oz cut-out and 4oz cut-in
3PSI gauge
NJ Master HVACR Lic# 4630
Specializing in Steam Heating, Serving the residents of New Jersey
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This does cause us a problem in the present, as we have no idea who's chart was used originally. My best suggestion would be to look around the other pipes and see what sizes were run to the radiators in the rest of the facility. You would want to do this since if you put in a pipe that is larger than the others, I guarantee your radiator will heat, however the next one in line may be starved for steam. If you put in a radiator pipe that is too small (albeit from a chart that an engineer made) the "path of least resistance" will be significantly higher in this pipe, and the radiator may be slow to heat.
Hope that somewhat helps.
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Some moron contractor installed a baseboard rad and ran 3/4 pipe to it. So instead of running a 2nd line back and tying it into a wet return, (more work) I have a small one pipe steam rad of 25 to 30 EDR which I am going to install and feed with one inch pipe (since that is the size coming off the bullnose of my tee on main) And slope it 1/2 to 1/4 inch per foot. It's going to be straight run (2) 90s and maybe a 45.
Does anyone see anything wrong with this plan?
Homeowner does not want to me to cut into main to increase tee size.
Lastly, should I install a vent which lets the air out quickly or slowly?
Thanks guys,
Bill