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Squealing steam heat

mchema
mchema Member Posts: 37
Toward the end of my heat cycle  I have this lovely Squealing noise screaming out of every rad in my house. The rads downstairs are worse than upstairs but regardless I wake up in the night to the annoying squeal!  It goes on for about 5 minutes.The pressure is at 1 psi. The squealing started when it got colder and the heat cycled longer to get the house up to temperature.



 In better news I'm having a steam specialist coming out to look at a few issues with our system and get things balance out next week. But is there anything else I can look at in the mean to that might quiet things so I can sleep through the night or should I just wait and have a few more nights of noisy rads.... 

Comments

  • gerry gill
    gerry gill Member Posts: 3,045
    toward the end of the cycle, or

    AT the end of the cycle when the burner shuts down? as the steam collapses with the burner shut down, a vacuum forms which must be broken..if the only way to break the vacuum is with radiator vents they may whistle..main vents help with this..you may need to stand next to the boiler to determine if the squeal is after the fire shuts off..
    gwgillplumbingandheating.com
    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.

  • jpf321
    jpf321 Member Posts: 1,568
    mine too

    I've been meaning to address thisby working on rad pitch (or so I think) .. mine whistle is AT END after fire is down .. my pressure is never more than 6oz .. i have new main vents Gorton #2's .. i'll have to see if they squeal or suck .. it's not every rad but it is the ones where I know I have a pitch problem .. and by pitch I mean angle of sitting not musical pitch of the vents squealing.
    1-pipe Homeowner - Queens, NYC

    NEW: SlantFin Intrepid TR-30 + Tankless + Riello 40-F5 @ 0.85gph | OLD: Fitzgibbons 402 boiler + Beckett "SR" Oil Gun @ 1.75gph

    installed: 0-20oz/si gauge | vaporstat | hour-meter | gortons on all rads | 1pc G#2 + 1pc G#1 on each of 2 mains

    Connected EDR load: 371 sf venting load: 2.95cfm vent capacity: 4.62cfm
    my NEW system pics | my OLD system pics
  • mchema
    mchema Member Posts: 37
    edited December 2009
    HAHA

    Well Gerry funny thing... You are the one coming to my home... and it's more like the last 15 min  of the cycle it's just really loud  the last 5 min.... I'm up listening to it know at 5:30am... not by choice... ugh... 



    And no the burner is on... when all this hissing, squealing, spitting noise is going on... Once the systems tuns off all is quiet. Then about 30 seconds later there is a slight hisss that comes out which I'm assuming is the vacuum..
  • gerry gill
    gerry gill Member Posts: 3,045
    edited December 2009
    that sounds like bad vents.

    you should hear air escaping as the system fills with steam..not loud, but if you listen hard for it you will hear it..then as the steam gets to the vent and it gets hot it should close off some times with a slight click..then all should be quiet..then you may hear the air vent open to break the vacuum once the steam collapses..if the air vent is heated (touch it) and its making sputtering,squealing, hissing, spitting etc noises, then that vent is usually bad..i say ususally because strange and bad things happpen when pipes are pitched wrong, are installed undersized etc..but assuming the pipes are okay, that would be bad vents..Loose or leaky valve packing nuts, and unions can give you those sounds too..that would apply to one pipe or two pipe steam.
    gwgillplumbingandheating.com
    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.

  • mchema
    mchema Member Posts: 37
    I give up...

    we will see what the verdict is come Tuesday... I have no clue... Maybe when we get all those main vents on life will change... 
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