Some Radiators not heating

Alan(CaliforniaRadiant)Forbes

you have a single-pipe steam system. Did the pro check to make sure the air vents on the radiators are working? If air can't get out, steam can't get in.

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Anthony_8

Some Radiators not heating

had a pro at my 4 story house. Some radiators not getting hot others only getting halfway. pro says that all valves are ok. pro says that he has never seen single pipe system where radiators need to be flushed. radiators that are not heating are on 1st and 2nd floor - only one or two not heating on floor.

do have air valves in the pipes in the basement but did not help.

any ideas

Anthony_8

Some Radiators not heating

thanks for the comeback - he took them off the radiators and nothing was coming out. they are all new(ish)

Alan(CaliforniaRadiant)Forbes

So he

took the air vents off? And did he take the valves off between the pipe and the radiator? With the boiler steaming, nothing came out?

I need some help here fellas'; running out of options.

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Anthony_8

Some Radiators not heating

he just took the air vents off. not the valves - all risers were smoking hot though...plus the valves are new

Mike T., Swampeast MO

Bad Hand Valves?

Have felt some before that seem to put up resistance and you think they're turning inside, but the only thing turning is the stem against some broken, ragged metal edges.

Anthony_8

Some Radiators not heating

i'll tell my guy - I got him from this site..if anyone thinks of anything else please let me know..

thanks guys

Steamhead

That's either a problem with pipe pitch

or an underfired boiler, or it might be a couple of other things. Try the Find a Professional page of this site to locate a good steam man. If you're in the Baltimore area, e-mail me!

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tommyoil

Lets not forget

Are the runouts to the rads big enough to accomodate the btu load of the rads in question. Are the runouts excessively long? Cant fit ten pounds of baloney in a five pound bag. Did the tech take out the valves under a full head of steam? Or as steamhead said is the boiler underfired??? Sounds like theres a restriction(i.e half closed or fully closed valve) or poor pitch holding water and restricting steam flow. How close to the rad does the steam actually get?

Weezbo

this is gonna sound dumb....

is there any possibility you lost a valve? near the boiler sorta large? ummm....to me it sounds like an entire supply has been shut off..

Steamhead

I actually saw that once

a king valve was partly shut on a Vapor system, and they had trouble getting heat to the end of the system. The best part was, the steam rushing thru that too-small opening set up a harmonic vibration, and the Vaporstat bounced all over the place.

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