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gurgling sound in hot water system

ChrisJChrisJ Posts: 8,807Member
A friend has a forced hot water system using a fairly new WM boiler and he recently noticed a gurgling sound, or a sound as if there is air in the system for 10-20 seconds after the pump turns on.  It sounds like water pouring.



The system seems to heat well and he has tried bleeding radiators several times and has not been able to get any water out of the system.



Any ideas?  I'm a steam guy my self and have never worked on a hot water system.
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment

Steam system pictures
https://goo.gl/photos/ZgpNUTyckkmiEdAf9
Central air project pictures
https://goo.gl/photos/4JjnLStEq42sWsQo8

Comments

  • Mark EathertonMark Eatherton Posts: 5,819Member
    You're a rarity...

    Most people have lots of experience with hot water, but none with steam :-)



    Just guessing that your friends pump is on the return, pumping towards the expansion tank connection, which causes air in suspension to ballon when it sees negative pressures produced by the pump.



    Got pictures?



    Welcome to The Wall.



    ME
    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
  • ChrisJChrisJ Posts: 8,807Member
    return

    Hi Mark,



    Thanks for the response.  He says the pump is on the return but he is not sure where the expansion tank is.  He is going to get me a picture tonight when he goes home.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment

    Steam system pictures
    https://goo.gl/photos/ZgpNUTyckkmiEdAf9
    Central air project pictures
    https://goo.gl/photos/4JjnLStEq42sWsQo8
  • Steve WhitbeckSteve Whitbeck Posts: 669Member
    system pressure

    Is at or near Zero

    The system pressure should be at approx. 12 PSI.

    No water from air vents on radiators means not enough water pressure in system to raise the water to that level.
  • ChrisJChrisJ Posts: 8,807Member
    Ooops

    I meant to say he isn't getting any air when he bleeds the radiators. He gets plenty of water and I'm sure the system is at 12 PSI.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment

    Steam system pictures
    https://goo.gl/photos/ZgpNUTyckkmiEdAf9
    Central air project pictures
    https://goo.gl/photos/4JjnLStEq42sWsQo8
This discussion has been closed.

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